Split ES6 Template logic from main functionality.
This commit is contained in:
Ingvar Stepanyan
Marijn Haverbeke
parent
d1a5db36cc
commit
372e1d42f3
157
acorn.js
157
acorn.js
@ -535,11 +535,11 @@
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// `tokRegexpAllowed`, and skips the space after the token, so that
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// the next one's `tokStart` will point at the right position.
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function finishToken(type, val) {
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function finishToken(type, val, shouldSkipSpace) {
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tokEnd = tokPos;
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if (options.locations) tokEndLoc = new Position;
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tokType = type;
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if (type !== _bquote || inTemplate) skipSpace();
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if (shouldSkipSpace !== false) skipSpace();
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tokVal = val;
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tokRegexpAllowed = type.beforeExpr;
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if (options.onToken) {
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@ -720,24 +720,32 @@
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return finishOp(code === 61 ? _eq : _prefix, 1);
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}
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function getTokenFromCode(code) {
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// Special rules work inside ES6 template strings.
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if (inTemplate) {
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// '`' and '${' have special meanings, but they should follow string (can be empty)
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if (tokType === _string) {
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if (code === 96) { // '`'
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++tokPos;
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return finishToken(_bquote);
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}
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if (code === 36 && input.charCodeAt(tokPos + 1) === 123) { // '${'
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tokPos += 2;
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return finishToken(_dollarBraceL);
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}
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// Get token inside ES6 template (special rules work there).
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function getTemplateToken(code) {
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// '`' and '${' have special meanings, but they should follow
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// string (can be empty)
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if (tokType === _string) {
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if (code === 96) { // '`'
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++tokPos;
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return finishToken(_bquote);
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} else
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if (code === 36 && input.charCodeAt(tokPos + 1) === 123) { // '${'
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tokPos += 2;
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return finishToken(_dollarBraceL);
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}
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// anything else is considered string literal
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return readString();
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}
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if (code === 125) { // '}'
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++tokPos;
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return finishToken(_braceR, undefined, false);
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}
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// anything else is considered string literal
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return readTmplString();
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}
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function getTokenFromCode(code) {
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switch (code) {
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// The interpretation of a dot depends on whether it is followed
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// by a digit or another two dots.
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@ -759,7 +767,7 @@
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case 96: // '`'
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if (options.ecmaVersion >= 6) {
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++tokPos;
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return finishToken(_bquote);
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return finishToken(_bquote, undefined, false);
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}
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case 48: // '0'
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@ -819,9 +827,12 @@
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if (tokPos >= inputLen) return finishToken(_eof);
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var code = input.charCodeAt(tokPos);
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if (inTemplate) return getTemplateToken(code);
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// Identifier or keyword. '\uXXXX' sequences are allowed in
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// identifiers, so '\' also dispatches to that.
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if (!inTemplate && (isIdentifierStart(code) || code === 92 /* '\' */)) return readWord();
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if (isIdentifierStart(code) || code === 92 /* '\' */) return readWord();
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var tok = getTokenFromCode(code);
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@ -954,62 +965,46 @@
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}
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function readString(quote) {
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if (!inTemplate) tokPos++;
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++tokPos;
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var out = "";
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for (;;) {
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if (tokPos >= inputLen) raise(tokStart, "Unterminated string constant");
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var ch = input.charCodeAt(tokPos);
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if (inTemplate) {
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if (ch === 96 || ch === 36 && input.charCodeAt(tokPos + 1) === 123) // '`', '${'
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return finishToken(_string, out);
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} else if (ch === quote) {
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if (ch === quote) {
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++tokPos;
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return finishToken(_string, out);
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}
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if (ch === 92) { // '\'
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ch = input.charCodeAt(++tokPos);
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var octal = /^[0-7]+/.exec(input.slice(tokPos, tokPos + 3));
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if (octal) octal = octal[0];
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while (octal && parseInt(octal, 8) > 255) octal = octal.slice(0, -1);
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if (octal === "0") octal = null;
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++tokPos;
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if (octal) {
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if (strict) raise(tokPos - 2, "Octal literal in strict mode");
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out += String.fromCharCode(parseInt(octal, 8));
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tokPos += octal.length - 1;
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} else {
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switch (ch) {
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case 110: out += "\n"; break; // 'n' -> '\n'
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case 114: out += "\r"; break; // 'r' -> '\r'
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case 120: out += String.fromCharCode(readHexChar(2)); break; // 'x'
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case 117: out += readCodePoint(); break; // 'u'
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case 85: out += String.fromCharCode(readHexChar(8)); break; // 'U'
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case 116: out += "\t"; break; // 't' -> '\t'
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case 98: out += "\b"; break; // 'b' -> '\b'
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case 118: out += "\u000b"; break; // 'v' -> '\u000b'
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case 102: out += "\f"; break; // 'f' -> '\f'
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case 48: out += "\0"; break; // 0 -> '\0'
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case 13: if (input.charCodeAt(tokPos) === 10) ++tokPos; // '\r\n'
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case 10: // ' \n'
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if (options.locations) { tokLineStart = tokPos; ++tokCurLine; }
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break;
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default: out += String.fromCharCode(ch); break;
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}
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}
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out += readEscapedChar();
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} else {
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++tokPos;
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if (newline.test(String.fromCharCode(ch))) {
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if (inTemplate) {
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if (ch === 13 && input.charCodeAt(tokPos) === 10) {
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++tokPos;
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ch = 10;
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}
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if (options.locations) {
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++tokCurLine;
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tokLineStart = tokPos;
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}
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} else {
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raise(tokStart, "Unterminated string constant");
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raise(tokStart, "Unterminated string constant");
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}
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out += String.fromCharCode(ch); // '\'
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}
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}
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}
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function readTmplString() {
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var out = "";
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for (;;) {
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if (tokPos >= inputLen) raise(tokStart, "Unterminated string constant");
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var ch = input.charCodeAt(tokPos);
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if (ch === 96 || ch === 36 && input.charCodeAt(tokPos + 1) === 123) // '`', '${'
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return finishToken(_string, out);
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if (ch === 92) { // '\'
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out += readEscapedChar();
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} else {
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++tokPos;
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if (newline.test(String.fromCharCode(ch))) {
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if (ch === 13 && input.charCodeAt(tokPos) === 10) {
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++tokPos;
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ch = 10;
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}
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if (options.locations) {
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++tokCurLine;
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tokLineStart = tokPos;
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}
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}
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out += String.fromCharCode(ch); // '\'
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@ -1017,6 +1012,40 @@
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}
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}
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// Used to read escaped characters
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function readEscapedChar() {
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var ch = input.charCodeAt(++tokPos);
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var octal = /^[0-7]+/.exec(input.slice(tokPos, tokPos + 3));
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if (octal) octal = octal[0];
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while (octal && parseInt(octal, 8) > 255) octal = octal.slice(0, -1);
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if (octal === "0") octal = null;
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++tokPos;
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if (octal) {
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if (strict) raise(tokPos - 2, "Octal literal in strict mode");
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tokPos += octal.length - 1;
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return String.fromCharCode(parseInt(octal, 8));
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} else {
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switch (ch) {
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case 110: return "\n"; // 'n' -> '\n'
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case 114: return "\r"; // 'r' -> '\r'
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case 120: return String.fromCharCode(readHexChar(2)); // 'x'
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case 117: return readCodePoint(); // 'u'
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case 85: return String.fromCharCode(readHexChar(8)); // 'U'
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case 116: return "\t"; // 't' -> '\t'
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case 98: return "\b"; // 'b' -> '\b'
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case 118: return "\u000b"; // 'v' -> '\u000b'
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case 102: return "\f"; // 'f' -> '\f'
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case 48: return "\0"; // 0 -> '\0'
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case 13: if (input.charCodeAt(tokPos) === 10) ++tokPos; // '\r\n'
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case 10: // ' \n'
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if (options.locations) { tokLineStart = tokPos; ++tokCurLine; }
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return "";
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default: return String.fromCharCode(ch);
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}
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}
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}
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// Used to read character escape sequences ('\x', '\u', '\U').
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function readHexChar(len) {
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301
index.html
301
index.html
@ -326,11 +326,11 @@ line break). Used to count lines.</p> </td> <td class="c
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<span class="nx">skipSpace</span><span class="p">();</span>
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<span class="p">}</span></pre></div> </td> </tr> <tr id="section-60"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-60">¶</a> </div> <p>Called at the end of every token. Sets <code>tokEnd</code>, <code>tokVal</code>, and
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<code>tokRegexpAllowed</code>, and skips the space after the token, so that
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the next one's <code>tokStart</code> will point at the right position.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">val</span><span class="p">)</span> <span class="p">{</span>
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the next one's <code>tokStart</code> will point at the right position.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">val</span><span class="p">,</span> <span class="nx">shouldSkipSpace</span><span class="p">)</span> <span class="p">{</span>
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<span class="nx">tokEnd</span> <span class="o">=</span> <span class="nx">tokPos</span><span class="p">;</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span> <span class="nx">tokEndLoc</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Position</span><span class="p">;</span>
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<span class="nx">tokType</span> <span class="o">=</span> <span class="nx">type</span><span class="p">;</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">type</span> <span class="o">!==</span> <span class="nx">_bquote</span> <span class="o">||</span> <span class="nx">inTemplate</span><span class="p">)</span> <span class="nx">skipSpace</span><span class="p">();</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">shouldSkipSpace</span> <span class="o">!==</span> <span class="kc">false</span><span class="p">)</span> <span class="nx">skipSpace</span><span class="p">();</span>
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<span class="nx">tokVal</span> <span class="o">=</span> <span class="nx">val</span><span class="p">;</span>
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<span class="nx">tokRegexpAllowed</span> <span class="o">=</span> <span class="nx">type</span><span class="p">.</span><span class="nx">beforeExpr</span><span class="p">;</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">onToken</span><span class="p">)</span> <span class="p">{</span>
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@ -495,20 +495,25 @@ into it.</p>
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<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_arrow</span><span class="p">);</span>
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<span class="p">}</span>
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<span class="k">return</span> <span class="nx">finishOp</span><span class="p">(</span><span class="nx">code</span> <span class="o">===</span> <span class="mi">61</span> <span class="o">?</span> <span class="nx">_eq</span> <span class="o">:</span> <span class="nx">_prefix</span><span class="p">,</span> <span class="mi">1</span><span class="p">);</span>
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<span class="p">}</span>
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<span class="kd">function</span> <span class="nx">getTokenFromCode</span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-66"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-66">¶</a> </div> <p>Special rules work inside ES6 template strings.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">inTemplate</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-67"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-67">¶</a> </div> <p>'`' and '${' have special meanings, but they should follow string (can be empty)</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_string</span><span class="p">)</span> <span class="p">{</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">code</span> <span class="o">===</span> <span class="mi">96</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// '`'</span>
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<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
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<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_bquote</span><span class="p">);</span>
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<span class="p">}</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">code</span> <span class="o">===</span> <span class="mi">36</span> <span class="o">&&</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">===</span> <span class="mi">123</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// '${'</span>
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<span class="nx">tokPos</span> <span class="o">+=</span> <span class="mi">2</span><span class="p">;</span>
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<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_dollarBraceL</span><span class="p">);</span>
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<span class="p">}</span>
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<span class="p">}</span></pre></div> </td> </tr> <tr id="section-68"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-68">¶</a> </div> <p>anything else is considered string literal</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">return</span> <span class="nx">readString</span><span class="p">();</span>
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<span class="p">}</span></pre></div> </td> </tr> <tr id="section-66"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-66">¶</a> </div> <p>Get token inside ES6 template (special rules work there).</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">getTemplateToken</span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-67"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-67">¶</a> </div> <p>'`' and '${' have special meanings, but they should follow
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string (can be empty)</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_string</span><span class="p">)</span> <span class="p">{</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">code</span> <span class="o">===</span> <span class="mi">96</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// '`'</span>
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<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
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<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_bquote</span><span class="p">);</span>
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<span class="p">}</span> <span class="k">else</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">code</span> <span class="o">===</span> <span class="mi">36</span> <span class="o">&&</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">===</span> <span class="mi">123</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// '${'</span>
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<span class="nx">tokPos</span> <span class="o">+=</span> <span class="mi">2</span><span class="p">;</span>
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<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_dollarBraceL</span><span class="p">);</span>
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<span class="p">}</span>
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<span class="p">}</span>
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<span class="k">if</span> <span class="p">(</span><span class="nx">code</span> <span class="o">===</span> <span class="mi">125</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// '}'</span>
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<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
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<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_braceR</span><span class="p">,</span> <span class="kc">undefined</span><span class="p">,</span> <span class="kc">false</span><span class="p">);</span>
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<span class="p">}</span></pre></div> </td> </tr> <tr id="section-68"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-68">¶</a> </div> <p>anything else is considered string literal</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">return</span> <span class="nx">readTmplString</span><span class="p">();</span>
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<span class="p">}</span>
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<span class="kd">function</span> <span class="nx">getTokenFromCode</span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="p">{</span>
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<span class="k">switch</span> <span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-69"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-69">¶</a> </div> <p>The interpretation of a dot depends on whether it is followed
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by a digit or another two dots.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">case</span> <span class="mi">46</span><span class="o">:</span> <span class="c1">// '.'</span>
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<span class="k">return</span> <span class="nx">readToken_dot</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-70"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-70">¶</a> </div> <p>Punctuation tokens.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">case</span> <span class="mi">40</span><span class="o">:</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_parenL</span><span class="p">);</span>
|
||||
@ -525,7 +530,7 @@ by a digit or another two dots.</p> </td> <td class="cod
|
||||
<span class="k">case</span> <span class="mi">96</span><span class="o">:</span> <span class="c1">// '`'</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_bquote</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_bquote</span><span class="p">,</span> <span class="kc">undefined</span><span class="p">,</span> <span class="kc">false</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
|
||||
<span class="k">case</span> <span class="mi">48</span><span class="o">:</span> <span class="c1">// '0'</span>
|
||||
@ -575,8 +580,10 @@ of the type given by its first argument.</p> </td> <td c
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">forceRegexp</span><span class="p">)</span> <span class="k">return</span> <span class="nx">readRegexp</span><span class="p">();</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokPos</span> <span class="o">>=</span> <span class="nx">inputLen</span><span class="p">)</span> <span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_eof</span><span class="p">);</span>
|
||||
|
||||
<span class="kd">var</span> <span class="nx">code</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-74"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-74">¶</a> </div> <p>Identifier or keyword. '\uXXXX' sequences are allowed in
|
||||
identifiers, so '\' also dispatches to that.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">inTemplate</span> <span class="o">&&</span> <span class="p">(</span><span class="nx">isIdentifierStart</span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">||</span> <span class="nx">code</span> <span class="o">===</span> <span class="mi">92</span> <span class="cm">/* '\' */</span><span class="p">))</span> <span class="k">return</span> <span class="nx">readWord</span><span class="p">();</span>
|
||||
<span class="kd">var</span> <span class="nx">code</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">);</span>
|
||||
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">inTemplate</span><span class="p">)</span> <span class="k">return</span> <span class="nx">getTemplateToken</span><span class="p">(</span><span class="nx">code</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-74"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-74">¶</a> </div> <p>Identifier or keyword. '\uXXXX' sequences are allowed in
|
||||
identifiers, so '\' also dispatches to that.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">isIdentifierStart</span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">||</span> <span class="nx">code</span> <span class="o">===</span> <span class="mi">92</span> <span class="cm">/* '\' */</span><span class="p">)</span> <span class="k">return</span> <span class="nx">readWord</span><span class="p">();</span>
|
||||
|
||||
<span class="kd">var</span> <span class="nx">tok</span> <span class="o">=</span> <span class="nx">getTokenFromCode</span><span class="p">(</span><span class="nx">code</span><span class="p">);</span>
|
||||
|
||||
@ -686,74 +693,88 @@ will return <code>null</code> unless the integer has exactly <code>len</code> di
|
||||
<span class="p">}</span>
|
||||
|
||||
<span class="kd">function</span> <span class="nx">readString</span><span class="p">(</span><span class="nx">quote</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">inTemplate</span><span class="p">)</span> <span class="nx">tokPos</span><span class="o">++</span><span class="p">;</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="kd">var</span> <span class="nx">out</span> <span class="o">=</span> <span class="s2">""</span><span class="p">;</span>
|
||||
<span class="k">for</span> <span class="p">(;;)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokPos</span> <span class="o">>=</span> <span class="nx">inputLen</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">"Unterminated string constant"</span><span class="p">);</span>
|
||||
<span class="kd">var</span> <span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">inTemplate</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">96</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">36</span> <span class="o">&&</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">===</span> <span class="mi">123</span><span class="p">)</span> <span class="c1">// '`', '${'</span>
|
||||
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_string</span><span class="p">,</span> <span class="nx">out</span><span class="p">);</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="nx">quote</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="nx">quote</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_string</span><span class="p">,</span> <span class="nx">out</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">92</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// '\'</span>
|
||||
<span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="o">++</span><span class="nx">tokPos</span><span class="p">);</span>
|
||||
<span class="kd">var</span> <span class="nx">octal</span> <span class="o">=</span> <span class="sr">/^[0-7]+/</span><span class="p">.</span><span class="nx">exec</span><span class="p">(</span><span class="nx">input</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">,</span> <span class="nx">tokPos</span> <span class="o">+</span> <span class="mi">3</span><span class="p">));</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">octal</span><span class="p">)</span> <span class="nx">octal</span> <span class="o">=</span> <span class="nx">octal</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span>
|
||||
<span class="k">while</span> <span class="p">(</span><span class="nx">octal</span> <span class="o">&&</span> <span class="nb">parseInt</span><span class="p">(</span><span class="nx">octal</span><span class="p">,</span> <span class="mi">8</span><span class="p">)</span> <span class="o">></span> <span class="mi">255</span><span class="p">)</span> <span class="nx">octal</span> <span class="o">=</span> <span class="nx">octal</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">octal</span> <span class="o">===</span> <span class="s2">"0"</span><span class="p">)</span> <span class="nx">octal</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">octal</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">strict</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">-</span> <span class="mi">2</span><span class="p">,</span> <span class="s2">"Octal literal in strict mode"</span><span class="p">);</span>
|
||||
<span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nb">parseInt</span><span class="p">(</span><span class="nx">octal</span><span class="p">,</span> <span class="mi">8</span><span class="p">));</span>
|
||||
<span class="nx">tokPos</span> <span class="o">+=</span> <span class="nx">octal</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="k">switch</span> <span class="p">(</span><span class="nx">ch</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">case</span> <span class="mi">110</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">"\n"</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'n' -> '\n'</span>
|
||||
<span class="k">case</span> <span class="mi">114</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">"\r"</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'r' -> '\r'</span>
|
||||
<span class="k">case</span> <span class="mi">120</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">2</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'x'</span>
|
||||
<span class="k">case</span> <span class="mi">117</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nx">readCodePoint</span><span class="p">();</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'u'</span>
|
||||
<span class="k">case</span> <span class="mi">85</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">8</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'U'</span>
|
||||
<span class="k">case</span> <span class="mi">116</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">"\t"</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 't' -> '\t'</span>
|
||||
<span class="k">case</span> <span class="mi">98</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">"\b"</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'b' -> '\b'</span>
|
||||
<span class="k">case</span> <span class="mi">118</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">"\u000b"</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'v' -> '\u000b'</span>
|
||||
<span class="k">case</span> <span class="mi">102</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">"\f"</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 'f' -> '\f'</span>
|
||||
<span class="k">case</span> <span class="mi">48</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">"\0"</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 0 -> '\0'</span>
|
||||
<span class="k">case</span> <span class="mi">13</span><span class="o">:</span> <span class="k">if</span> <span class="p">(</span><span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">)</span> <span class="o">===</span> <span class="mi">10</span><span class="p">)</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="c1">// '\r\n'</span>
|
||||
<span class="k">case</span> <span class="mi">10</span><span class="o">:</span> <span class="c1">// ' \n'</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span> <span class="p">{</span> <span class="nx">tokLineStart</span> <span class="o">=</span> <span class="nx">tokPos</span><span class="p">;</span> <span class="o">++</span><span class="nx">tokCurLine</span><span class="p">;</span> <span class="p">}</span>
|
||||
<span class="k">break</span><span class="p">;</span>
|
||||
<span class="k">default</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">out</span> <span class="o">+=</span> <span class="nx">readEscapedChar</span><span class="p">();</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">newline</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">)))</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">inTemplate</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">13</span> <span class="o">&&</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">)</span> <span class="o">===</span> <span class="mi">10</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="nx">ch</span> <span class="o">=</span> <span class="mi">10</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokCurLine</span><span class="p">;</span>
|
||||
<span class="nx">tokLineStart</span> <span class="o">=</span> <span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">"Unterminated string constant"</span><span class="p">);</span>
|
||||
<span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">"Unterminated string constant"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span> <span class="c1">// '\'</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
|
||||
<span class="kd">function</span> <span class="nx">readTmplString</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">out</span> <span class="o">=</span> <span class="s2">""</span><span class="p">;</span>
|
||||
<span class="k">for</span> <span class="p">(;;)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokPos</span> <span class="o">>=</span> <span class="nx">inputLen</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">"Unterminated string constant"</span><span class="p">);</span>
|
||||
<span class="kd">var</span> <span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">96</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">36</span> <span class="o">&&</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">===</span> <span class="mi">123</span><span class="p">)</span> <span class="c1">// '`', '${'</span>
|
||||
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_string</span><span class="p">,</span> <span class="nx">out</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">92</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// '\'</span>
|
||||
<span class="nx">out</span> <span class="o">+=</span> <span class="nx">readEscapedChar</span><span class="p">();</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">newline</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">)))</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">13</span> <span class="o">&&</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">)</span> <span class="o">===</span> <span class="mi">10</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="nx">ch</span> <span class="o">=</span> <span class="mi">10</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="o">++</span><span class="nx">tokCurLine</span><span class="p">;</span>
|
||||
<span class="nx">tokLineStart</span> <span class="o">=</span> <span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span> <span class="c1">// '\'</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-82"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-82">¶</a> </div> <p>Used to read character escape sequences ('\x', '\u', '\U').</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">readHexChar</span><span class="p">(</span><span class="nx">len</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-82"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-82">¶</a> </div> <p>Used to read escaped characters</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">readEscapedChar</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="o">++</span><span class="nx">tokPos</span><span class="p">);</span>
|
||||
<span class="kd">var</span> <span class="nx">octal</span> <span class="o">=</span> <span class="sr">/^[0-7]+/</span><span class="p">.</span><span class="nx">exec</span><span class="p">(</span><span class="nx">input</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">,</span> <span class="nx">tokPos</span> <span class="o">+</span> <span class="mi">3</span><span class="p">));</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">octal</span><span class="p">)</span> <span class="nx">octal</span> <span class="o">=</span> <span class="nx">octal</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span>
|
||||
<span class="k">while</span> <span class="p">(</span><span class="nx">octal</span> <span class="o">&&</span> <span class="nb">parseInt</span><span class="p">(</span><span class="nx">octal</span><span class="p">,</span> <span class="mi">8</span><span class="p">)</span> <span class="o">></span> <span class="mi">255</span><span class="p">)</span> <span class="nx">octal</span> <span class="o">=</span> <span class="nx">octal</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">octal</span> <span class="o">===</span> <span class="s2">"0"</span><span class="p">)</span> <span class="nx">octal</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">octal</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">strict</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">-</span> <span class="mi">2</span><span class="p">,</span> <span class="s2">"Octal literal in strict mode"</span><span class="p">);</span>
|
||||
<span class="nx">tokPos</span> <span class="o">+=</span> <span class="nx">octal</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span>
|
||||
<span class="k">return</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nb">parseInt</span><span class="p">(</span><span class="nx">octal</span><span class="p">,</span> <span class="mi">8</span><span class="p">));</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="k">switch</span> <span class="p">(</span><span class="nx">ch</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">case</span> <span class="mi">110</span><span class="o">:</span> <span class="k">return</span> <span class="s2">"\n"</span><span class="p">;</span> <span class="c1">// 'n' -> '\n'</span>
|
||||
<span class="k">case</span> <span class="mi">114</span><span class="o">:</span> <span class="k">return</span> <span class="s2">"\r"</span><span class="p">;</span> <span class="c1">// 'r' -> '\r'</span>
|
||||
<span class="k">case</span> <span class="mi">120</span><span class="o">:</span> <span class="k">return</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">2</span><span class="p">));</span> <span class="c1">// 'x'</span>
|
||||
<span class="k">case</span> <span class="mi">117</span><span class="o">:</span> <span class="k">return</span> <span class="nx">readCodePoint</span><span class="p">();</span> <span class="c1">// 'u'</span>
|
||||
<span class="k">case</span> <span class="mi">85</span><span class="o">:</span> <span class="k">return</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">8</span><span class="p">));</span> <span class="c1">// 'U'</span>
|
||||
<span class="k">case</span> <span class="mi">116</span><span class="o">:</span> <span class="k">return</span> <span class="s2">"\t"</span><span class="p">;</span> <span class="c1">// 't' -> '\t'</span>
|
||||
<span class="k">case</span> <span class="mi">98</span><span class="o">:</span> <span class="k">return</span> <span class="s2">"\b"</span><span class="p">;</span> <span class="c1">// 'b' -> '\b'</span>
|
||||
<span class="k">case</span> <span class="mi">118</span><span class="o">:</span> <span class="k">return</span> <span class="s2">"\u000b"</span><span class="p">;</span> <span class="c1">// 'v' -> '\u000b'</span>
|
||||
<span class="k">case</span> <span class="mi">102</span><span class="o">:</span> <span class="k">return</span> <span class="s2">"\f"</span><span class="p">;</span> <span class="c1">// 'f' -> '\f'</span>
|
||||
<span class="k">case</span> <span class="mi">48</span><span class="o">:</span> <span class="k">return</span> <span class="s2">"\0"</span><span class="p">;</span> <span class="c1">// 0 -> '\0'</span>
|
||||
<span class="k">case</span> <span class="mi">13</span><span class="o">:</span> <span class="k">if</span> <span class="p">(</span><span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">)</span> <span class="o">===</span> <span class="mi">10</span><span class="p">)</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="c1">// '\r\n'</span>
|
||||
<span class="k">case</span> <span class="mi">10</span><span class="o">:</span> <span class="c1">// ' \n'</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span> <span class="p">{</span> <span class="nx">tokLineStart</span> <span class="o">=</span> <span class="nx">tokPos</span><span class="p">;</span> <span class="o">++</span><span class="nx">tokCurLine</span><span class="p">;</span> <span class="p">}</span>
|
||||
<span class="k">return</span> <span class="s2">""</span><span class="p">;</span>
|
||||
<span class="k">default</span><span class="o">:</span> <span class="k">return</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-83"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-83">¶</a> </div> <p>Used to read character escape sequences ('\x', '\u', '\U').</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">readHexChar</span><span class="p">(</span><span class="nx">len</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">n</span> <span class="o">=</span> <span class="nx">readInt</span><span class="p">(</span><span class="mi">16</span><span class="p">,</span> <span class="nx">len</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">n</span> <span class="o">===</span> <span class="kc">null</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">"Bad character escape sequence"</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">n</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-83"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-83">¶</a> </div> <p>Used to signal to callers of <code>readWord1</code> whether the word
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-84"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-84">¶</a> </div> <p>Used to signal to callers of <code>readWord1</code> whether the word
|
||||
contained any escape sequences. This is needed because words with
|
||||
escape sequences must not be interpreted as keywords.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">containsEsc</span><span class="p">;</span></pre></div> </td> </tr> <tr id="section-84"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-84">¶</a> </div> <p>Read an identifier, and return it as a string. Sets <code>containsEsc</code>
|
||||
escape sequences must not be interpreted as keywords.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">containsEsc</span><span class="p">;</span></pre></div> </td> </tr> <tr id="section-85"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-85">¶</a> </div> <p>Read an identifier, and return it as a string. Sets <code>containsEsc</code>
|
||||
to whether the word contained a '\u' escape.</p>
|
||||
|
||||
<p>Only builds up the word character-by-character when it actually
|
||||
@ -783,14 +804,14 @@ containeds an escape, as a micro-optimization.</p> </td>
|
||||
<span class="nx">first</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">containsEsc</span> <span class="o">?</span> <span class="nx">word</span> <span class="o">:</span> <span class="nx">input</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="nx">start</span><span class="p">,</span> <span class="nx">tokPos</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-85"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-85">¶</a> </div> <p>Read an identifier or keyword token. Will check for reserved
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-86"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-86">¶</a> </div> <p>Read an identifier or keyword token. Will check for reserved
|
||||
words when necessary.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">readWord</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">word</span> <span class="o">=</span> <span class="nx">readWord1</span><span class="p">();</span>
|
||||
<span class="kd">var</span> <span class="nx">type</span> <span class="o">=</span> <span class="nx">_name</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">containsEsc</span> <span class="o">&&</span> <span class="nx">isKeyword</span><span class="p">(</span><span class="nx">word</span><span class="p">))</span>
|
||||
<span class="nx">type</span> <span class="o">=</span> <span class="nx">keywordTypes</span><span class="p">[</span><span class="nx">word</span><span class="p">];</span>
|
||||
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">word</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-86"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-86">¶</a> </div> <h2>Parser</h2> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-87"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-87">¶</a> </div> <p>A recursive descent parser operates by defining functions for all
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-87"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-87">¶</a> </div> <h2>Parser</h2> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-88"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-88">¶</a> </div> <p>A recursive descent parser operates by defining functions for all
|
||||
syntactic elements, and recursively calling those, each function
|
||||
advancing the input stream and returning an AST node. Precedence
|
||||
of constructs (for example, the fact that <code>!x[1]</code> means <code>!(x[1])</code>
|
||||
@ -804,12 +825,12 @@ way, it'll receive the node for <code>x[1]</code> already parsed, and wraps
|
||||
operator precedence, because it is much more compact than using
|
||||
the technique outlined above, which uses different, nesting
|
||||
functions to specify precedence, for all of the ten binary
|
||||
precedence levels that JavaScript defines.</p> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-88"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-88">¶</a> </div> <h3>Parser utilities</h3> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-89"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-89">¶</a> </div> <p>Continue to the next token.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">next</span><span class="p">()</span> <span class="p">{</span>
|
||||
precedence levels that JavaScript defines.</p> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-89"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-89">¶</a> </div> <h3>Parser utilities</h3> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-90"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-90">¶</a> </div> <p>Continue to the next token.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">next</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="nx">lastStart</span> <span class="o">=</span> <span class="nx">tokStart</span><span class="p">;</span>
|
||||
<span class="nx">lastEnd</span> <span class="o">=</span> <span class="nx">tokEnd</span><span class="p">;</span>
|
||||
<span class="nx">lastEndLoc</span> <span class="o">=</span> <span class="nx">tokEndLoc</span><span class="p">;</span>
|
||||
<span class="nx">readToken</span><span class="p">();</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-90"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-90">¶</a> </div> <p>Enter strict mode. Re-reads the next token to please pedantic
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-91"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-91">¶</a> </div> <p>Enter strict mode. Re-reads the next token to please pedantic
|
||||
tests ("use strict"; 010; -- should fail).</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">setStrict</span><span class="p">(</span><span class="nx">strct</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">strict</span> <span class="o">=</span> <span class="nx">strct</span><span class="p">;</span>
|
||||
<span class="nx">tokPos</span> <span class="o">=</span> <span class="nx">tokStart</span><span class="p">;</span>
|
||||
@ -821,7 +842,7 @@ tests ("use strict"; 010; -- should fail).</p> </td> <td
|
||||
<span class="p">}</span>
|
||||
<span class="nx">skipSpace</span><span class="p">();</span>
|
||||
<span class="nx">readToken</span><span class="p">();</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-91"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-91">¶</a> </div> <p>Start an AST node, attaching a start offset.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">Node</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-92"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-92">¶</a> </div> <p>Start an AST node, attaching a start offset.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">Node</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="k">this</span><span class="p">.</span><span class="nx">type</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="k">this</span><span class="p">.</span><span class="nx">start</span> <span class="o">=</span> <span class="nx">tokStart</span><span class="p">;</span>
|
||||
<span class="k">this</span><span class="p">.</span><span class="nx">end</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
@ -844,7 +865,7 @@ tests ("use strict"; 010; -- should fail).</p> </td> <td
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ranges</span><span class="p">)</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">range</span> <span class="o">=</span> <span class="p">[</span><span class="nx">tokStart</span><span class="p">,</span> <span class="mi">0</span><span class="p">];</span>
|
||||
<span class="k">return</span> <span class="nx">node</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-92"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-92">¶</a> </div> <p>Start a node whose start offset information should be based on
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-93"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-93">¶</a> </div> <p>Start a node whose start offset information should be based on
|
||||
the start of another node. For example, a binary operator node is
|
||||
only started after its left-hand side has already been parsed.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">startNodeFrom</span><span class="p">(</span><span class="nx">other</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Node</span><span class="p">();</span>
|
||||
@ -857,7 +878,7 @@ only started after its left-hand side has already been parsed.</p> <
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">range</span> <span class="o">=</span> <span class="p">[</span><span class="nx">other</span><span class="p">.</span><span class="nx">range</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="mi">0</span><span class="p">];</span>
|
||||
|
||||
<span class="k">return</span> <span class="nx">node</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-93"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-93">¶</a> </div> <p>Finish an AST node, adding <code>type</code> and <code>end</code> properties.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-94"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-94">¶</a> </div> <p>Finish an AST node, adding <code>type</code> and <code>end</code> properties.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">type</span> <span class="o">=</span> <span class="nx">type</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">end</span> <span class="o">=</span> <span class="nx">lastEnd</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span>
|
||||
@ -865,10 +886,10 @@ only started after its left-hand side has already been parsed.</p> <
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ranges</span><span class="p">)</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">range</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="nx">lastEnd</span><span class="p">;</span>
|
||||
<span class="k">return</span> <span class="nx">node</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-94"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-94">¶</a> </div> <p>Test whether a statement node is the string literal <code>"use strict"</code>.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">isUseStrict</span><span class="p">(</span><span class="nx">stmt</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-95"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-95">¶</a> </div> <p>Test whether a statement node is the string literal <code>"use strict"</code>.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">isUseStrict</span><span class="p">(</span><span class="nx">stmt</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">return</span> <span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">5</span> <span class="o">&&</span> <span class="nx">stmt</span><span class="p">.</span><span class="nx">type</span> <span class="o">===</span> <span class="s2">"ExpressionStatement"</span> <span class="o">&&</span>
|
||||
<span class="nx">stmt</span><span class="p">.</span><span class="nx">expression</span><span class="p">.</span><span class="nx">type</span> <span class="o">===</span> <span class="s2">"Literal"</span> <span class="o">&&</span> <span class="nx">stmt</span><span class="p">.</span><span class="nx">expression</span><span class="p">.</span><span class="nx">value</span> <span class="o">===</span> <span class="s2">"use strict"</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-95"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-95">¶</a> </div> <p>Predicate that tests whether the next token is of the given
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-96"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-96">¶</a> </div> <p>Predicate that tests whether the next token is of the given
|
||||
type, and if yes, consumes it as a side effect.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">eat</span><span class="p">(</span><span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
@ -876,20 +897,20 @@ type, and if yes, consumes it as a side effect.</p> </td>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-96"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-96">¶</a> </div> <p>Test whether a semicolon can be inserted at the current position.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">canInsertSemicolon</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-97"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-97">¶</a> </div> <p>Test whether a semicolon can be inserted at the current position.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">canInsertSemicolon</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="k">return</span> <span class="o">!</span><span class="nx">options</span><span class="p">.</span><span class="nx">strictSemicolons</span> <span class="o">&&</span>
|
||||
<span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_eof</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_braceR</span> <span class="o">||</span> <span class="nx">newline</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">input</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="nx">lastEnd</span><span class="p">,</span> <span class="nx">tokStart</span><span class="p">)));</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-97"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-97">¶</a> </div> <p>Consume a semicolon, or, failing that, see if we are allowed to
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-98"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-98">¶</a> </div> <p>Consume a semicolon, or, failing that, see if we are allowed to
|
||||
pretend that there is a semicolon at this position.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">semicolon</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_semi</span><span class="p">)</span> <span class="o">&&</span> <span class="o">!</span><span class="nx">canInsertSemicolon</span><span class="p">())</span> <span class="nx">unexpected</span><span class="p">();</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-98"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-98">¶</a> </div> <p>Expect a token of a given type. If found, consume it, otherwise,
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-99"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-99">¶</a> </div> <p>Expect a token of a given type. If found, consume it, otherwise,
|
||||
raise an unexpected token error.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">expect</span><span class="p">(</span><span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">eat</span><span class="p">(</span><span class="nx">type</span><span class="p">)</span> <span class="o">||</span> <span class="nx">unexpected</span><span class="p">();</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-99"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-99">¶</a> </div> <p>Raise an unexpected token error.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">unexpected</span><span class="p">(</span><span class="nx">pos</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-100"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-100">¶</a> </div> <p>Raise an unexpected token error.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">unexpected</span><span class="p">(</span><span class="nx">pos</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">raise</span><span class="p">(</span><span class="nx">pos</span> <span class="o">!=</span> <span class="kc">null</span> <span class="o">?</span> <span class="nx">pos</span> <span class="o">:</span> <span class="nx">tokStart</span><span class="p">,</span> <span class="s2">"Unexpected token"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-100"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-100">¶</a> </div> <p>Checks if hash object has a property.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">has</span><span class="p">(</span><span class="nx">obj</span><span class="p">,</span> <span class="nx">propName</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-101"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-101">¶</a> </div> <p>Checks if hash object has a property.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">has</span><span class="p">(</span><span class="nx">obj</span><span class="p">,</span> <span class="nx">propName</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">return</span> <span class="nb">Object</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">hasOwnProperty</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">obj</span><span class="p">,</span> <span class="nx">propName</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-101"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-101">¶</a> </div> <p>Convert existing expression atom to assignable pattern
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-102"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-102">¶</a> </div> <p>Convert existing expression atom to assignable pattern
|
||||
if possible.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">toAssignable</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">allowSpread</span><span class="p">,</span> <span class="nx">checkType</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span> <span class="o">&&</span> <span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">switch</span> <span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -927,10 +948,10 @@ if possible.</p> </td> <td class="code"> <
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">node</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-102"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-102">¶</a> </div> <p>Checks if node can be assignable spread argument.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">checkSpreadAssign</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-103"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-103">¶</a> </div> <p>Checks if node can be assignable spread argument.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">checkSpreadAssign</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">type</span> <span class="o">!==</span> <span class="s2">"Identifier"</span> <span class="o">&&</span> <span class="nx">node</span><span class="p">.</span><span class="nx">type</span> <span class="o">!==</span> <span class="s2">"ArrayPattern"</span><span class="p">)</span>
|
||||
<span class="nx">unexpected</span><span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">start</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-103"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-103">¶</a> </div> <p>Verify that argument names are not repeated, and it does not
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-104"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-104">¶</a> </div> <p>Verify that argument names are not repeated, and it does not
|
||||
try to bind the words <code>eval</code> or <code>arguments</code>.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">checkFunctionParam</span><span class="p">(</span><span class="nx">param</span><span class="p">,</span> <span class="nx">nameHash</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">switch</span> <span class="p">(</span><span class="nx">param</span><span class="p">.</span><span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">case</span> <span class="s2">"Identifier"</span><span class="o">:</span>
|
||||
@ -951,7 +972,7 @@ try to bind the words <code>eval</code> or <code>arguments</code>.</p>
|
||||
<span class="nx">checkFunctionParam</span><span class="p">(</span><span class="nx">param</span><span class="p">.</span><span class="nx">elements</span><span class="p">[</span><span class="nx">i</span><span class="p">],</span> <span class="nx">nameHash</span><span class="p">);</span>
|
||||
<span class="k">break</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-104"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-104">¶</a> </div> <p>Check if property name clashes with already added.
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-105"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-105">¶</a> </div> <p>Check if property name clashes with already added.
|
||||
Object/class getters and setters are not allowed to clash —
|
||||
either with each other or with an init property — and in
|
||||
strict mode, init properties are also not allowed to be repeated.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">checkPropClash</span><span class="p">(</span><span class="nx">prop</span><span class="p">,</span> <span class="nx">propHash</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -976,7 +997,7 @@ strict mode, init properties are also not allowed to be repeated.</p>
|
||||
<span class="p">};</span>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">other</span><span class="p">[</span><span class="nx">kind</span><span class="p">]</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-105"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-105">¶</a> </div> <p>Verify that a node is an lval — something that can be assigned
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-106"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-106">¶</a> </div> <p>Verify that a node is an lval — something that can be assigned
|
||||
to.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">checkLVal</span><span class="p">(</span><span class="nx">expr</span><span class="p">,</span> <span class="nx">isBinding</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">switch</span> <span class="p">(</span><span class="nx">expr</span><span class="p">.</span><span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">case</span> <span class="s2">"Identifier"</span><span class="o">:</span>
|
||||
@ -1008,7 +1029,7 @@ to.</p> </td> <td class="code"> <div class
|
||||
<span class="k">default</span><span class="o">:</span>
|
||||
<span class="nx">raise</span><span class="p">(</span><span class="nx">expr</span><span class="p">.</span><span class="nx">start</span><span class="p">,</span> <span class="s2">"Assigning to rvalue"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-106"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-106">¶</a> </div> <h3>Statement parsing</h3> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-107"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-107">¶</a> </div> <p>Parse a program. Initializes the parser, reads any number of
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-107"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-107">¶</a> </div> <h3>Statement parsing</h3> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-108"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-108">¶</a> </div> <p>Parse a program. Initializes the parser, reads any number of
|
||||
statements, and wraps them in a Program node. Optionally takes a
|
||||
<code>program</code> argument. If present, the statements will be appended
|
||||
to its body instead of creating a new node.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseTopLevel</span><span class="p">(</span><span class="nx">program</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -1029,7 +1050,7 @@ to its body instead of creating a new node.</p> </td> <t
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"Program"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
|
||||
<span class="kd">var</span> <span class="nx">loopLabel</span> <span class="o">=</span> <span class="p">{</span><span class="nx">kind</span><span class="o">:</span> <span class="s2">"loop"</span><span class="p">},</span> <span class="nx">switchLabel</span> <span class="o">=</span> <span class="p">{</span><span class="nx">kind</span><span class="o">:</span> <span class="s2">"switch"</span><span class="p">};</span></pre></div> </td> </tr> <tr id="section-108"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-108">¶</a> </div> <p>Parse a single statement.</p>
|
||||
<span class="kd">var</span> <span class="nx">loopLabel</span> <span class="o">=</span> <span class="p">{</span><span class="nx">kind</span><span class="o">:</span> <span class="s2">"loop"</span><span class="p">},</span> <span class="nx">switchLabel</span> <span class="o">=</span> <span class="p">{</span><span class="nx">kind</span><span class="o">:</span> <span class="s2">"switch"</span><span class="p">};</span></pre></div> </td> </tr> <tr id="section-109"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-109">¶</a> </div> <p>Parse a single statement.</p>
|
||||
|
||||
<p>If expecting a statement and finding a slash operator, parse a
|
||||
regular expression literal. This is to handle cases like
|
||||
@ -1038,7 +1059,7 @@ does not help.</p> </td> <td class="code">
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_slash</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_assign</span> <span class="o">&&</span> <span class="nx">tokVal</span> <span class="o">==</span> <span class="s2">"/="</span><span class="p">)</span>
|
||||
<span class="nx">readToken</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span>
|
||||
|
||||
<span class="kd">var</span> <span class="nx">starttype</span> <span class="o">=</span> <span class="nx">tokType</span><span class="p">,</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-109"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-109">¶</a> </div> <p>Most types of statements are recognized by the keyword they
|
||||
<span class="kd">var</span> <span class="nx">starttype</span> <span class="o">=</span> <span class="nx">tokType</span><span class="p">,</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-110"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-110">¶</a> </div> <p>Most types of statements are recognized by the keyword they
|
||||
start with. Many are trivial to parse, some require a bit of
|
||||
complexity.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">switch</span> <span class="p">(</span><span class="nx">starttype</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">case</span> <span class="nx">_break</span><span class="o">:</span> <span class="k">case</span> <span class="nx">_continue</span><span class="o">:</span> <span class="k">return</span> <span class="nx">parseBreakContinueStatement</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">starttype</span><span class="p">.</span><span class="nx">keyword</span><span class="p">);</span>
|
||||
@ -1058,7 +1079,7 @@ complexity.</p> </td> <td class="code"> <d
|
||||
<span class="k">case</span> <span class="nx">_braceL</span><span class="o">:</span> <span class="k">return</span> <span class="nx">parseBlock</span><span class="p">();</span> <span class="c1">// no point creating a function for this</span>
|
||||
<span class="k">case</span> <span class="nx">_semi</span><span class="o">:</span> <span class="k">return</span> <span class="nx">parseEmptyStatement</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
|
||||
<span class="k">case</span> <span class="nx">_export</span><span class="o">:</span> <span class="k">return</span> <span class="nx">parseExport</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
|
||||
<span class="k">case</span> <span class="nx">_import</span><span class="o">:</span> <span class="k">return</span> <span class="nx">parseImport</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-110"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-110">¶</a> </div> <p>If the statement does not start with a statement keyword or a
|
||||
<span class="k">case</span> <span class="nx">_import</span><span class="o">:</span> <span class="k">return</span> <span class="nx">parseImport</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-111"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-111">¶</a> </div> <p>If the statement does not start with a statement keyword or a
|
||||
brace, it's an ExpressionStatement or LabeledStatement. We
|
||||
simply start parsing an expression, and afterwards, if the
|
||||
next token is a colon and the expression was a simple
|
||||
@ -1078,7 +1099,7 @@ Identifier node, we switch to interpreting it as a label.</p> </td>
|
||||
<span class="k">else</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">label</span> <span class="o">=</span> <span class="nx">parseIdent</span><span class="p">();</span>
|
||||
<span class="nx">semicolon</span><span class="p">();</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-111"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-111">¶</a> </div> <p>Verify that there is an actual destination to break or
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-112"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-112">¶</a> </div> <p>Verify that there is an actual destination to break or
|
||||
continue to.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">for</span> <span class="p">(</span><span class="kd">var</span> <span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><</span> <span class="nx">labels</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span> <span class="o">++</span><span class="nx">i</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">lab</span> <span class="o">=</span> <span class="nx">labels</span><span class="p">[</span><span class="nx">i</span><span class="p">];</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">label</span> <span class="o">==</span> <span class="kc">null</span> <span class="o">||</span> <span class="nx">lab</span><span class="p">.</span><span class="nx">name</span> <span class="o">===</span> <span class="nx">node</span><span class="p">.</span><span class="nx">label</span><span class="p">.</span><span class="nx">name</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -1106,7 +1127,7 @@ continue to.</p> </td> <td class="code"> <
|
||||
<span class="nx">semicolon</span><span class="p">();</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"DoWhileStatement"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div> </td> </tr> <tr id="section-112"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-112">¶</a> </div> <p>Disambiguating between a <code>for</code> and a <code>for</code>/<code>in</code> or <code>for</code>/<code>of</code>
|
||||
</pre></div> </td> </tr> <tr id="section-113"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-113">¶</a> </div> <p>Disambiguating between a <code>for</code> and a <code>for</code>/<code>in</code> or <code>for</code>/<code>of</code>
|
||||
loop is non-trivial. Basically, we have to parse the init <code>var</code>
|
||||
statement or expression, disallowing the <code>in</code> operator (see
|
||||
the second parameter to <code>parseExpression</code>), and then check
|
||||
@ -1152,7 +1173,7 @@ is a regular <code>for</code> loop.</p> </td> <td class=
|
||||
<span class="kd">function</span> <span class="nx">parseReturnStatement</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">inFunction</span> <span class="o">&&</span> <span class="o">!</span><span class="nx">options</span><span class="p">.</span><span class="nx">allowReturnOutsideFunction</span><span class="p">)</span>
|
||||
<span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">"'return' outside of function"</span><span class="p">);</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-113"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-113">¶</a> </div> <p>In <code>return</code> (and <code>break</code>/<code>continue</code>), the keywords with
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-114"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-114">¶</a> </div> <p>In <code>return</code> (and <code>break</code>/<code>continue</code>), the keywords with
|
||||
optional arguments, we eagerly look for a semicolon or the
|
||||
possibility to insert one.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_semi</span><span class="p">)</span> <span class="o">||</span> <span class="nx">canInsertSemicolon</span><span class="p">())</span> <span class="nx">node</span><span class="p">.</span><span class="nx">argument</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="k">else</span> <span class="p">{</span> <span class="nx">node</span><span class="p">.</span><span class="nx">argument</span> <span class="o">=</span> <span class="nx">parseExpression</span><span class="p">();</span> <span class="nx">semicolon</span><span class="p">();</span> <span class="p">}</span>
|
||||
@ -1164,7 +1185,7 @@ possibility to insert one.</p> </td> <td class="code">
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">discriminant</span> <span class="o">=</span> <span class="nx">parseParenExpression</span><span class="p">();</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">cases</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_braceL</span><span class="p">);</span>
|
||||
<span class="nx">labels</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">switchLabel</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-114"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-114">¶</a> </div> <p>Statements under must be grouped (by label) in SwitchCase
|
||||
<span class="nx">labels</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">switchLabel</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-115"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-115">¶</a> </div> <p>Statements under must be grouped (by label) in SwitchCase
|
||||
nodes. <code>cur</code> is used to keep the node that we are currently
|
||||
adding statements to.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">for</span> <span class="p">(</span><span class="kd">var</span> <span class="nx">cur</span><span class="p">,</span> <span class="nx">sawDefault</span><span class="p">;</span> <span class="nx">tokType</span> <span class="o">!=</span> <span class="nx">_braceR</span><span class="p">;)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_case</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_default</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -1266,13 +1287,13 @@ adding statements to.</p> </td> <td class="code">
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">expression</span> <span class="o">=</span> <span class="nx">expr</span><span class="p">;</span>
|
||||
<span class="nx">semicolon</span><span class="p">();</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ExpressionStatement"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-115"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-115">¶</a> </div> <p>Used for constructs like <code>switch</code> and <code>if</code> that insist on
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-116"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-116">¶</a> </div> <p>Used for constructs like <code>switch</code> and <code>if</code> that insist on
|
||||
parentheses around their expression.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseParenExpression</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_parenL</span><span class="p">);</span>
|
||||
<span class="kd">var</span> <span class="nx">val</span> <span class="o">=</span> <span class="nx">parseExpression</span><span class="p">();</span>
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_parenR</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">val</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-116"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-116">¶</a> </div> <p>Parse a semicolon-enclosed block of statements, handling <code>"use
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-117"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-117">¶</a> </div> <p>Parse a semicolon-enclosed block of statements, handling <code>"use
|
||||
strict"</code> declarations when <code>allowStrict</code> is true (used for
|
||||
function bodies).</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseBlock</span><span class="p">(</span><span class="nx">allowStrict</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">(),</span> <span class="nx">first</span> <span class="o">=</span> <span class="kc">true</span><span class="p">,</span> <span class="nx">strict</span> <span class="o">=</span> <span class="kc">false</span><span class="p">,</span> <span class="nx">oldStrict</span><span class="p">;</span>
|
||||
@ -1289,7 +1310,7 @@ function bodies).</p> </td> <td class="code">
|
||||
<span class="p">}</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">strict</span> <span class="o">&&</span> <span class="o">!</span><span class="nx">oldStrict</span><span class="p">)</span> <span class="nx">setStrict</span><span class="p">(</span><span class="kc">false</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"BlockStatement"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-117"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-117">¶</a> </div> <p>Parse a regular <code>for</code> loop. The disambiguation code in
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-118"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-118">¶</a> </div> <p>Parse a regular <code>for</code> loop. The disambiguation code in
|
||||
<code>parseStatement</code> will already have parsed the init statement or
|
||||
expression.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseFor</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">init</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">init</span> <span class="o">=</span> <span class="nx">init</span><span class="p">;</span>
|
||||
@ -1301,7 +1322,7 @@ expression.</p> </td> <td class="code"> <d
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">body</span> <span class="o">=</span> <span class="nx">parseStatement</span><span class="p">();</span>
|
||||
<span class="nx">labels</span><span class="p">.</span><span class="nx">pop</span><span class="p">();</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ForStatement"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-118"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-118">¶</a> </div> <p>Parse a <code>for</code>/<code>in</code> and <code>for</code>/<code>of</code> loop, which are almost
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-119"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-119">¶</a> </div> <p>Parse a <code>for</code>/<code>in</code> and <code>for</code>/<code>of</code> loop, which are almost
|
||||
same from parser's perspective.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseForIn</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">init</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">type</span> <span class="o">=</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_in</span> <span class="o">?</span> <span class="s2">"ForInStatement"</span> <span class="o">:</span> <span class="s2">"ForOfStatement"</span><span class="p">;</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
@ -1311,7 +1332,7 @@ same from parser's perspective.</p> </td> <td class="cod
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">body</span> <span class="o">=</span> <span class="nx">parseStatement</span><span class="p">();</span>
|
||||
<span class="nx">labels</span><span class="p">.</span><span class="nx">pop</span><span class="p">();</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">type</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-119"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-119">¶</a> </div> <p>Parse a list of variable declarations.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseVar</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">noIn</span><span class="p">,</span> <span class="nx">kind</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-120"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-120">¶</a> </div> <p>Parse a list of variable declarations.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseVar</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">noIn</span><span class="p">,</span> <span class="nx">kind</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">declarations</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">kind</span> <span class="o">=</span> <span class="nx">kind</span><span class="p">;</span>
|
||||
<span class="k">for</span> <span class="p">(;;)</span> <span class="p">{</span>
|
||||
@ -1323,11 +1344,11 @@ same from parser's perspective.</p> </td> <td class="cod
|
||||
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_comma</span><span class="p">))</span> <span class="k">break</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">node</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-120"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-120">¶</a> </div> <h3>Expression parsing</h3> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-121"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-121">¶</a> </div> <p>These nest, from the most general expression type at the top to
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-121"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-121">¶</a> </div> <h3>Expression parsing</h3> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-122"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-122">¶</a> </div> <p>These nest, from the most general expression type at the top to
|
||||
'atomic', nondivisible expression types at the bottom. Most of
|
||||
the functions will simply let the function(s) below them parse,
|
||||
and, <em>if</em> the syntactic construct they handle is present, wrap
|
||||
the AST node that the inner parser gave them in another node.</p> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-122"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-122">¶</a> </div> <p>Parse a full expression. The arguments are used to forbid comma
|
||||
the AST node that the inner parser gave them in another node.</p> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-123"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-123">¶</a> </div> <p>Parse a full expression. The arguments are used to forbid comma
|
||||
sequences (in argument lists, array literals, or object literals)
|
||||
or the <code>in</code> operator (in for loops initalization expressions).</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExpression</span><span class="p">(</span><span class="nx">noComma</span><span class="p">,</span> <span class="nx">noIn</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">expr</span> <span class="o">=</span> <span class="nx">parseMaybeAssign</span><span class="p">(</span><span class="nx">noIn</span><span class="p">);</span>
|
||||
@ -1338,7 +1359,7 @@ or the <code>in</code> operator (in for loops initalization expressions).</p>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"SequenceExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">expr</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-123"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-123">¶</a> </div> <p>Parse an assignment expression. This includes applications of
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-124"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-124">¶</a> </div> <p>Parse an assignment expression. This includes applications of
|
||||
operators like <code>+=</code>.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseMaybeAssign</span><span class="p">(</span><span class="nx">noIn</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">left</span> <span class="o">=</span> <span class="nx">parseMaybeConditional</span><span class="p">(</span><span class="nx">noIn</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span><span class="p">.</span><span class="nx">isAssign</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -1351,7 +1372,7 @@ operators like <code>+=</code>.</p> </td> <td class="cod
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"AssignmentExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">left</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-124"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-124">¶</a> </div> <p>Parse a ternary conditional (<code>?:</code>) operator.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseMaybeConditional</span><span class="p">(</span><span class="nx">noIn</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-125"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-125">¶</a> </div> <p>Parse a ternary conditional (<code>?:</code>) operator.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseMaybeConditional</span><span class="p">(</span><span class="nx">noIn</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">expr</span> <span class="o">=</span> <span class="nx">parseExprOps</span><span class="p">(</span><span class="nx">noIn</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_question</span><span class="p">))</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNodeFrom</span><span class="p">(</span><span class="nx">expr</span><span class="p">);</span>
|
||||
@ -1362,9 +1383,9 @@ operators like <code>+=</code>.</p> </td> <td class="cod
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ConditionalExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">expr</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-125"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-125">¶</a> </div> <p>Start the precedence parser.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExprOps</span><span class="p">(</span><span class="nx">noIn</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-126"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-126">¶</a> </div> <p>Start the precedence parser.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExprOps</span><span class="p">(</span><span class="nx">noIn</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">return</span> <span class="nx">parseExprOp</span><span class="p">(</span><span class="nx">parseMaybeUnary</span><span class="p">(),</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="nx">noIn</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-126"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-126">¶</a> </div> <p>Parse binary operators with the operator precedence parsing
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-127"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-127">¶</a> </div> <p>Parse binary operators with the operator precedence parsing
|
||||
algorithm. <code>left</code> is the left-hand side of the operator.
|
||||
<code>minPrec</code> provides context that allows the function to stop and
|
||||
defer further parser to one of its callers when it encounters an
|
||||
@ -1383,7 +1404,7 @@ operator that has a lower precedence than the set it is parsing.</p>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">left</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-127"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-127">¶</a> </div> <p>Parse unary operators, both prefix and postfix.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseMaybeUnary</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-128"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-128">¶</a> </div> <p>Parse unary operators, both prefix and postfix.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseMaybeUnary</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span><span class="p">.</span><span class="nx">prefix</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">(),</span> <span class="nx">update</span> <span class="o">=</span> <span class="nx">tokType</span><span class="p">.</span><span class="nx">isUpdate</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">operator</span> <span class="o">=</span> <span class="nx">tokVal</span><span class="p">;</span>
|
||||
@ -1408,7 +1429,7 @@ operator that has a lower precedence than the set it is parsing.</p>
|
||||
<span class="nx">expr</span> <span class="o">=</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"UpdateExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">expr</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-128"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-128">¶</a> </div> <p>Parse call, dot, and <code>[]</code>-subscript expressions.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExprSubscripts</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-129"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-129">¶</a> </div> <p>Parse call, dot, and <code>[]</code>-subscript expressions.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExprSubscripts</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="k">return</span> <span class="nx">parseSubscripts</span><span class="p">(</span><span class="nx">parseExprAtom</span><span class="p">());</span>
|
||||
<span class="p">}</span>
|
||||
|
||||
@ -1437,7 +1458,7 @@ operator that has a lower precedence than the set it is parsing.</p>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">quasi</span> <span class="o">=</span> <span class="nx">parseTemplate</span><span class="p">();</span>
|
||||
<span class="k">return</span> <span class="nx">parseSubscripts</span><span class="p">(</span><span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"TaggedTemplateExpression"</span><span class="p">),</span> <span class="nx">noCalls</span><span class="p">);</span>
|
||||
<span class="p">}</span> <span class="k">return</span> <span class="nx">base</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-129"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-129">¶</a> </div> <p>Parse an atomic expression — either a single token that is an
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-130"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-130">¶</a> </div> <p>Parse an atomic expression — either a single token that is an
|
||||
expression, an expression started by a keyword like <code>function</code> or
|
||||
<code>new</code>, or an expression wrapped in punctuation like <code>()</code>, <code>[]</code>,
|
||||
or <code>{}</code>.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExprAtom</span><span class="p">()</span> <span class="p">{</span>
|
||||
@ -1473,7 +1494,7 @@ or <code>{}</code>.</p> </td> <td class="code">
|
||||
|
||||
<span class="k">case</span> <span class="nx">_parenL</span><span class="o">:</span>
|
||||
<span class="kd">var</span> <span class="nx">tokStartLoc1</span> <span class="o">=</span> <span class="nx">tokStartLoc</span><span class="p">,</span> <span class="nx">tokStart1</span> <span class="o">=</span> <span class="nx">tokStart</span><span class="p">,</span> <span class="nx">val</span><span class="p">,</span> <span class="nx">exprList</span><span class="p">;</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-130"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-130">¶</a> </div> <p>check whether this is generator comprehension or regular expression</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span> <span class="o">&&</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_for</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-131"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-131">¶</a> </div> <p>check whether this is generator comprehension or regular expression</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span> <span class="o">&&</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_for</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">val</span> <span class="o">=</span> <span class="nx">parseComprehension</span><span class="p">(</span><span class="nx">startNode</span><span class="p">(),</span> <span class="kc">true</span><span class="p">);</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">oldParenL</span> <span class="o">=</span> <span class="o">++</span><span class="nx">metParenL</span><span class="p">;</span>
|
||||
@ -1483,9 +1504,9 @@ or <code>{}</code>.</p> </td> <td class="code">
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
|
||||
<span class="nx">exprList</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_parenR</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-131"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-131">¶</a> </div> <p>if '=>' follows '(...)', convert contents to arguments</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">metParenL</span> <span class="o">===</span> <span class="nx">oldParenL</span> <span class="o">&&</span> <span class="nx">eat</span><span class="p">(</span><span class="nx">_arrow</span><span class="p">))</span> <span class="p">{</span>
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_parenR</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-132"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-132">¶</a> </div> <p>if '=>' follows '(...)', convert contents to arguments</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">metParenL</span> <span class="o">===</span> <span class="nx">oldParenL</span> <span class="o">&&</span> <span class="nx">eat</span><span class="p">(</span><span class="nx">_arrow</span><span class="p">))</span> <span class="p">{</span>
|
||||
<span class="nx">val</span> <span class="o">=</span> <span class="nx">parseArrowExpression</span><span class="p">(</span><span class="nx">startNode</span><span class="p">(),</span> <span class="nx">exprList</span><span class="p">);</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-132"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-132">¶</a> </div> <p>forbid '()' before everything but '=>'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">val</span><span class="p">)</span> <span class="nx">unexpected</span><span class="p">(</span><span class="nx">lastStart</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-133"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-133">¶</a> </div> <p>forbid '...' in sequence expressions</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-133"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-133">¶</a> </div> <p>forbid '()' before everything but '=>'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">val</span><span class="p">)</span> <span class="nx">unexpected</span><span class="p">(</span><span class="nx">lastStart</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-134"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-134">¶</a> </div> <p>forbid '...' in sequence expressions</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">for</span> <span class="p">(</span><span class="kd">var</span> <span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><</span> <span class="nx">exprList</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span> <span class="nx">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">exprList</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">type</span> <span class="o">===</span> <span class="s2">"SpreadElement"</span><span class="p">)</span> <span class="nx">unexpected</span><span class="p">();</span>
|
||||
<span class="p">}</span>
|
||||
@ -1505,7 +1526,7 @@ or <code>{}</code>.</p> </td> <td class="code">
|
||||
|
||||
<span class="k">case</span> <span class="nx">_bracketL</span><span class="o">:</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-134"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-134">¶</a> </div> <p>check whether this is array comprehension or regular array</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span> <span class="o">&&</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_for</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-135"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-135">¶</a> </div> <p>check whether this is array comprehension or regular array</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span> <span class="o">&&</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_for</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="k">return</span> <span class="nx">parseComprehension</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="kc">false</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">elements</span> <span class="o">=</span> <span class="nx">parseExprList</span><span class="p">(</span><span class="nx">_bracketR</span><span class="p">,</span> <span class="kc">true</span><span class="p">,</span> <span class="kc">true</span><span class="p">);</span>
|
||||
@ -1534,7 +1555,7 @@ or <code>{}</code>.</p> </td> <td class="code">
|
||||
<span class="k">default</span><span class="o">:</span>
|
||||
<span class="nx">unexpected</span><span class="p">();</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-135"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-135">¶</a> </div> <p>New's precedence is slightly tricky. It must allow its argument
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-136"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-136">¶</a> </div> <p>New's precedence is slightly tricky. It must allow its argument
|
||||
to be a <code>[]</code> or dot subscript expression, but not a call — at
|
||||
least, not without wrapping it in parentheses. Thus, it uses the</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseNew</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
@ -1543,12 +1564,12 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_parenL</span><span class="p">))</span> <span class="nx">node</span><span class="p">.</span><span class="nx">arguments</span> <span class="o">=</span> <span class="nx">parseExprList</span><span class="p">(</span><span class="nx">_parenR</span><span class="p">,</span> <span class="kc">false</span><span class="p">);</span>
|
||||
<span class="k">else</span> <span class="nx">node</span><span class="p">.</span><span class="nx">arguments</span> <span class="o">=</span> <span class="nx">empty</span><span class="p">;</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"NewExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-136"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-136">¶</a> </div> <p>Parse spread element '...expr'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseSpread</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-137"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-137">¶</a> </div> <p>Parse spread element '...expr'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseSpread</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">argument</span> <span class="o">=</span> <span class="nx">parseExpression</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"SpreadElement"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-137"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-137">¶</a> </div> <p>Parse template expression.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseTemplate</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-138"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-138">¶</a> </div> <p>Parse template expression.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseTemplate</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">expressions</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">quasis</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
@ -1572,7 +1593,7 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">inTemplate</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"TemplateLiteral"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-138"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-138">¶</a> </div> <p>Parse an object literal.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseObj</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-139"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-139">¶</a> </div> <p>Parse an object literal.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseObj</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">(),</span> <span class="nx">first</span> <span class="o">=</span> <span class="kc">true</span><span class="p">,</span> <span class="nx">propHash</span> <span class="o">=</span> <span class="p">{};</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">properties</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
@ -1626,7 +1647,7 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">prop</span><span class="p">.</span><span class="nx">key</span> <span class="o">=</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_num</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_string</span><span class="p">)</span> <span class="o">?</span> <span class="nx">parseExprAtom</span><span class="p">()</span> <span class="o">:</span> <span class="nx">parseIdent</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-139"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-139">¶</a> </div> <p>Initialize empty function node.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">initFunction</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-140"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-140">¶</a> </div> <p>Initialize empty function node.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">initFunction</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">id</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">params</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -1634,7 +1655,7 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">rest</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">generator</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-140"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-140">¶</a> </div> <p>Parse a function declaration or literal (depending on the
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-141"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-141">¶</a> </div> <p>Parse a function declaration or literal (depending on the
|
||||
<code>isStatement</code> parameter).</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseFunction</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">isStatement</span><span class="p">,</span> <span class="nx">allowExpressionBody</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">initFunction</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">ecmaVersion</span> <span class="o">>=</span> <span class="mi">6</span><span class="p">)</span> <span class="p">{</span>
|
||||
@ -1646,7 +1667,7 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
<span class="nx">parseFunctionParams</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
|
||||
<span class="nx">parseFunctionBody</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">allowExpressionBody</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">isStatement</span> <span class="o">?</span> <span class="s2">"FunctionDeclaration"</span> <span class="o">:</span> <span class="s2">"FunctionExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-141"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-141">¶</a> </div> <p>Parse object or class method.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseMethod</span><span class="p">(</span><span class="nx">isGenerator</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-142"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-142">¶</a> </div> <p>Parse object or class method.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseMethod</span><span class="p">(</span><span class="nx">isGenerator</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="nx">initFunction</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
|
||||
<span class="nx">parseFunctionParams</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
|
||||
@ -1659,7 +1680,7 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
<span class="p">}</span>
|
||||
<span class="nx">parseFunctionBody</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">allowExpressionBody</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"FunctionExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-142"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-142">¶</a> </div> <p>Parse arrow function expression with given parameters.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseArrowExpression</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">params</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-143"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-143">¶</a> </div> <p>Parse arrow function expression with given parameters.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseArrowExpression</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">params</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">initFunction</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
|
||||
|
||||
<span class="kd">var</span> <span class="nx">defaults</span> <span class="o">=</span> <span class="nx">node</span><span class="p">.</span><span class="nx">defaults</span><span class="p">,</span> <span class="nx">hasDefaults</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
@ -1687,7 +1708,7 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
|
||||
<span class="nx">parseFunctionBody</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="kc">true</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ArrowFunctionExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-143"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-143">¶</a> </div> <p>Parse function parameters.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseFunctionParams</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-144"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-144">¶</a> </div> <p>Parse function parameters.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseFunctionParams</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">defaults</span> <span class="o">=</span> <span class="p">[],</span> <span class="nx">hasDefaults</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_parenL</span><span class="p">);</span>
|
||||
@ -1714,19 +1735,19 @@ least, not without wrapping it in parentheses. Thus, it uses the</p>
|
||||
<span class="p">}</span>
|
||||
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">hasDefaults</span><span class="p">)</span> <span class="nx">node</span><span class="p">.</span><span class="nx">defaults</span> <span class="o">=</span> <span class="nx">defaults</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-144"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-144">¶</a> </div> <p>Parse function body and check parameters.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseFunctionBody</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">allowExpression</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-145"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-145">¶</a> </div> <p>Parse function body and check parameters.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseFunctionBody</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">allowExpression</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">isExpression</span> <span class="o">=</span> <span class="nx">allowExpression</span> <span class="o">&&</span> <span class="nx">tokType</span> <span class="o">!==</span> <span class="nx">_braceL</span><span class="p">;</span>
|
||||
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">isExpression</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">body</span> <span class="o">=</span> <span class="nx">parseExpression</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">expression</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-145"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-145">¶</a> </div> <p>Start a new scope with regard to labels and the <code>inFunction</code>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-146"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-146">¶</a> </div> <p>Start a new scope with regard to labels and the <code>inFunction</code>
|
||||
flag (restore them to their old value afterwards).</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">oldInFunc</span> <span class="o">=</span> <span class="nx">inFunction</span><span class="p">,</span> <span class="nx">oldInGen</span> <span class="o">=</span> <span class="nx">inGenerator</span><span class="p">,</span> <span class="nx">oldLabels</span> <span class="o">=</span> <span class="nx">labels</span><span class="p">;</span>
|
||||
<span class="nx">inFunction</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span> <span class="nx">inGenerator</span> <span class="o">=</span> <span class="nx">node</span><span class="p">.</span><span class="nx">generator</span><span class="p">;</span> <span class="nx">labels</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">body</span> <span class="o">=</span> <span class="nx">parseBlock</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">expression</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
<span class="nx">inFunction</span> <span class="o">=</span> <span class="nx">oldInFunc</span><span class="p">;</span> <span class="nx">inGenerator</span> <span class="o">=</span> <span class="nx">oldInGen</span><span class="p">;</span> <span class="nx">labels</span> <span class="o">=</span> <span class="nx">oldLabels</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-146"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-146">¶</a> </div> <p>If this is a strict mode function, verify that argument names
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-147"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-147">¶</a> </div> <p>If this is a strict mode function, verify that argument names
|
||||
are not repeated, and it does not try to bind the words <code>eval</code>
|
||||
or <code>arguments</code>.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">strict</span> <span class="o">||</span> <span class="o">!</span><span class="nx">isExpression</span> <span class="o">&&</span> <span class="nx">node</span><span class="p">.</span><span class="nx">body</span><span class="p">.</span><span class="nx">body</span><span class="p">.</span><span class="nx">length</span> <span class="o">&&</span> <span class="nx">isUseStrict</span><span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">body</span><span class="p">.</span><span class="nx">body</span><span class="p">[</span><span class="mi">0</span><span class="p">]))</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">nameHash</span> <span class="o">=</span> <span class="p">{};</span>
|
||||
@ -1737,7 +1758,7 @@ or <code>arguments</code>.</p> </td> <td class="code">
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">rest</span><span class="p">)</span>
|
||||
<span class="nx">checkFunctionParam</span><span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">rest</span><span class="p">,</span> <span class="nx">nameHash</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-147"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-147">¶</a> </div> <p>Parse a class declaration or literal (depending on the
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-148"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-148">¶</a> </div> <p>Parse a class declaration or literal (depending on the
|
||||
<code>isStatement</code> parameter).</p> </td> <td class="code"> <div class="highlight"><pre>
|
||||
<span class="kd">function</span> <span class="nx">parseClass</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">isStatement</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
@ -1771,7 +1792,7 @@ or <code>arguments</code>.</p> </td> <td class="code">
|
||||
<span class="p">}</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">body</span> <span class="o">=</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">classBody</span><span class="p">,</span> <span class="s2">"ClassBody"</span><span class="p">);</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">isStatement</span> <span class="o">?</span> <span class="s2">"ClassDeclaration"</span> <span class="o">:</span> <span class="s2">"ClassExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-148"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-148">¶</a> </div> <p>Parses a comma-separated list of expressions, and returns them as
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-149"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-149">¶</a> </div> <p>Parses a comma-separated list of expressions, and returns them as
|
||||
an array. <code>close</code> is the token type that ends the list, and
|
||||
<code>allowEmpty</code> can be turned on to allow subsequent commas with
|
||||
nothing in between them to be parsed as <code>null</code> (which is needed
|
||||
@ -1787,7 +1808,7 @@ for array literals).</p> </td> <td class="code">
|
||||
<span class="k">else</span> <span class="nx">elts</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">parseExpression</span><span class="p">(</span><span class="kc">true</span><span class="p">));</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">elts</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-149"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-149">¶</a> </div> <p>Parse the next token as an identifier. If <code>liberal</code> is true (used
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-150"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-150">¶</a> </div> <p>Parse the next token as an identifier. If <code>liberal</code> is true (used
|
||||
when parsing properties), it will also convert keywords into
|
||||
identifiers.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseIdent</span><span class="p">(</span><span class="nx">liberal</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
@ -1808,19 +1829,19 @@ identifiers.</p> </td> <td class="code"> <
|
||||
<span class="nx">tokRegexpAllowed</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"Identifier"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-150"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-150">¶</a> </div> <p>Parses module export declaration.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExport</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-151"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-151">¶</a> </div> <p>export var|const|let|function|class ...;</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_var</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_const</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_let</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_function</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_class</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-151"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-151">¶</a> </div> <p>Parses module export declaration.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExport</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-152"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-152">¶</a> </div> <p>export var|const|let|function|class ...;</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_var</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_const</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_let</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_function</span> <span class="o">||</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_class</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">declaration</span> <span class="o">=</span> <span class="nx">parseStatement</span><span class="p">();</span>
|
||||
<span class="nx">node</span><span class="p">[</span><span class="s1">'default'</span><span class="p">]</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">specifiers</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">source</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="p">}</span> <span class="k">else</span></pre></div> </td> </tr> <tr id="section-152"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-152">¶</a> </div> <p>export default ...;</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_default</span><span class="p">))</span> <span class="p">{</span>
|
||||
<span class="p">}</span> <span class="k">else</span></pre></div> </td> </tr> <tr id="section-153"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-153">¶</a> </div> <p>export default ...;</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_default</span><span class="p">))</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">declaration</span> <span class="o">=</span> <span class="nx">parseExpression</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span>
|
||||
<span class="nx">node</span><span class="p">[</span><span class="s1">'default'</span><span class="p">]</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">specifiers</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">source</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="nx">semicolon</span><span class="p">();</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-153"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-153">¶</a> </div> <p>export * from '...'
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-154"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-154">¶</a> </div> <p>export * from '...'
|
||||
export { x, y as z } [from '...']</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">isBatch</span> <span class="o">=</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_star</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">declaration</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
<span class="nx">node</span><span class="p">[</span><span class="s1">'default'</span><span class="p">]</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
|
||||
@ -1834,12 +1855,12 @@ export { x, y as z } [from '...']</p> </td> <td class="c
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ExportDeclaration"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-154"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-154">¶</a> </div> <p>Parses a comma-separated list of module exports.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExportSpecifiers</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-155"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-155">¶</a> </div> <p>Parses a comma-separated list of module exports.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseExportSpecifiers</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">nodes</span> <span class="o">=</span> <span class="p">[],</span> <span class="nx">first</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_star</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-155"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-155">¶</a> </div> <p>export * from '...'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_star</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-156"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-156">¶</a> </div> <p>export * from '...'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
<span class="nx">nodes</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ExportBatchSpecifier"</span><span class="p">));</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-156"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-156">¶</a> </div> <p>export { x, y as z } [from '...']</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">expect</span><span class="p">(</span><span class="nx">_braceL</span><span class="p">);</span>
|
||||
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-157"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-157">¶</a> </div> <p>export { x, y as z } [from '...']</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">expect</span><span class="p">(</span><span class="nx">_braceL</span><span class="p">);</span>
|
||||
<span class="k">while</span> <span class="p">(</span><span class="o">!</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_braceR</span><span class="p">))</span> <span class="p">{</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">first</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_comma</span><span class="p">);</span>
|
||||
@ -1858,8 +1879,8 @@ export { x, y as z } [from '...']</p> </td> <td class="c
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">nodes</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-157"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-157">¶</a> </div> <p>Parses import declaration.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseImport</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-158"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-158">¶</a> </div> <p>import '...';</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_string</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-158"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-158">¶</a> </div> <p>Parses import declaration.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseImport</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-159"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-159">¶</a> </div> <p>import '...';</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_string</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">specifiers</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">source</span> <span class="o">=</span> <span class="nx">parseExprAtom</span><span class="p">();</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">kind</span> <span class="o">=</span> <span class="s2">""</span><span class="p">;</span>
|
||||
@ -1867,11 +1888,11 @@ export { x, y as z } [from '...']</p> </td> <td class="c
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">specifiers</span> <span class="o">=</span> <span class="nx">parseImportSpecifiers</span><span class="p">();</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">!==</span> <span class="nx">_name</span> <span class="o">||</span> <span class="nx">tokVal</span> <span class="o">!==</span> <span class="s2">"from"</span><span class="p">)</span> <span class="nx">unexpected</span><span class="p">();</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">source</span> <span class="o">=</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_string</span> <span class="o">?</span> <span class="nx">parseExprAtom</span><span class="p">()</span> <span class="o">:</span> <span class="nx">unexpected</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-159"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-159">¶</a> </div> <p>only for backward compatibility with Esprima's AST
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">source</span> <span class="o">=</span> <span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_string</span> <span class="o">?</span> <span class="nx">parseExprAtom</span><span class="p">()</span> <span class="o">:</span> <span class="nx">unexpected</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-160"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-160">¶</a> </div> <p>only for backward compatibility with Esprima's AST
|
||||
(it doesn't support mixed default + named yet)</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">node</span><span class="p">.</span><span class="nx">kind</span> <span class="o">=</span> <span class="nx">node</span><span class="p">.</span><span class="nx">specifiers</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="s1">'default'</span><span class="p">]</span> <span class="o">?</span> <span class="s2">"default"</span> <span class="o">:</span> <span class="s2">"named"</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ImportDeclaration"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-160"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-160">¶</a> </div> <p>Parses a comma-separated list of module imports.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseImportSpecifiers</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-161"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-161">¶</a> </div> <p>Parses a comma-separated list of module imports.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseImportSpecifiers</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">nodes</span> <span class="o">=</span> <span class="p">[],</span> <span class="nx">first</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_star</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
@ -1883,7 +1904,7 @@ export { x, y as z } [from '...']</p> </td> <td class="c
|
||||
<span class="nx">nodes</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ImportBatchSpecifier"</span><span class="p">));</span>
|
||||
<span class="k">return</span> <span class="nx">nodes</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_name</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-161"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-161">¶</a> </div> <p>import defaultObj, { x, y as z } from '...'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_name</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-162"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-162">¶</a> </div> <p>import defaultObj, { x, y as z } from '...'</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">id</span> <span class="o">=</span> <span class="nx">parseIdent</span><span class="p">();</span>
|
||||
<span class="nx">checkLVal</span><span class="p">(</span><span class="nx">node</span><span class="p">.</span><span class="nx">id</span><span class="p">,</span> <span class="kc">true</span><span class="p">);</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">name</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
|
||||
@ -1911,7 +1932,7 @@ export { x, y as z } [from '...']</p> </td> <td class="c
|
||||
<span class="nx">nodes</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"ImportSpecifier"</span><span class="p">));</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">nodes</span><span class="p">;</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-162"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-162">¶</a> </div> <p>Parses yield expression inside generator.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseYield</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-163"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-163">¶</a> </div> <p>Parses yield expression inside generator.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseYield</span><span class="p">()</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">node</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
<span class="nx">next</span><span class="p">();</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">eat</span><span class="p">(</span><span class="nx">_semi</span><span class="p">)</span> <span class="o">||</span> <span class="nx">canInsertSemicolon</span><span class="p">())</span> <span class="p">{</span>
|
||||
@ -1922,7 +1943,7 @@ export { x, y as z } [from '...']</p> </td> <td class="c
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">argument</span> <span class="o">=</span> <span class="nx">parseExpression</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">return</span> <span class="nx">finishNode</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="s2">"YieldExpression"</span><span class="p">);</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-163"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-163">¶</a> </div> <p>Parses array and generator comprehensions.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseComprehension</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">isGenerator</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-164"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-164">¶</a> </div> <p>Parses array and generator comprehensions.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">parseComprehension</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">isGenerator</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="nx">node</span><span class="p">.</span><span class="nx">blocks</span> <span class="o">=</span> <span class="p">[];</span>
|
||||
<span class="k">while</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">===</span> <span class="nx">_for</span><span class="p">)</span> <span class="p">{</span>
|
||||
<span class="kd">var</span> <span class="nx">block</span> <span class="o">=</span> <span class="nx">startNode</span><span class="p">();</span>
|
||||
@ -1931,7 +1952,7 @@ export { x, y as z } [from '...']</p> </td> <td class="c
|
||||
<span class="nx">block</span><span class="p">.</span><span class="nx">left</span> <span class="o">=</span> <span class="nx">toAssignable</span><span class="p">(</span><span class="nx">parseExprAtom</span><span class="p">());</span>
|
||||
<span class="nx">checkLVal</span><span class="p">(</span><span class="nx">block</span><span class="p">.</span><span class="nx">left</span><span class="p">,</span> <span class="kc">true</span><span class="p">);</span>
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nx">tokType</span> <span class="o">!==</span> <span class="nx">_name</span> <span class="o">||</span> <span class="nx">tokVal</span> <span class="o">!==</span> <span class="s2">"of"</span><span class="p">)</span> <span class="nx">unexpected</span><span class="p">();</span>
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-164"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-164">¶</a> </div> <p><code>of</code> property is here for compatibility with Esprima's AST
|
||||
<span class="nx">next</span><span class="p">();</span></pre></div> </td> </tr> <tr id="section-165"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-165">¶</a> </div> <p><code>of</code> property is here for compatibility with Esprima's AST
|
||||
which also supports deprecated [for (... in ...) expr]</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">block</span><span class="p">.</span><span class="nx">of</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>
|
||||
<span class="nx">block</span><span class="p">.</span><span class="nx">right</span> <span class="o">=</span> <span class="nx">parseExpression</span><span class="p">();</span>
|
||||
<span class="nx">expect</span><span class="p">(</span><span class="nx">_parenR</span><span class="p">);</span>
|
||||
|
||||
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Reference in New Issue
Block a user