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refactor: extract tt.lt and tt.gt from tt.relation (#13892)

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This commit is contained in:
Huáng Jùnliàng
2021-11-01 21:15:42 -04:00
committed by GitHub
parent 05af38cff2
commit 1fa759f989
7 changed files with 143 additions and 137 deletions
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52
packages/babel-parser/src/tokenizer/index.js
View File

@@ -727,18 +727,38 @@ export default class Tokenizer extends ParserErrors {
}
}
readToken_lt_gt(code: number): void {
// '<>'
const next = this.input.charCodeAt(this.state.pos + 1);
let size = 1;
readToken_lt(): void {
// '<'
const { pos } = this.state;
const next = this.input.charCodeAt(pos + 1);
if (next === code) {
size =
code === charCodes.greaterThan &&
this.input.charCodeAt(this.state.pos + 2) === charCodes.greaterThan
? 3
: 2;
if (this.input.charCodeAt(this.state.pos + size) === charCodes.equalsTo) {
if (next === charCodes.lessThan) {
if (this.input.charCodeAt(pos + 2) === charCodes.equalsTo) {
this.finishOp(tt.assign, 3);
return;
}
this.finishOp(tt.bitShift, 2);
return;
}
if (next === charCodes.equalsTo) {
// <=
this.finishOp(tt.relational, 2);
return;
}
this.finishOp(tt.lt, 1);
}
readToken_gt(): void {
// '>'
const { pos } = this.state;
const next = this.input.charCodeAt(pos + 1);
if (next === charCodes.greaterThan) {
const size =
this.input.charCodeAt(pos + 2) === charCodes.greaterThan ? 3 : 2;
if (this.input.charCodeAt(pos + size) === charCodes.equalsTo) {
this.finishOp(tt.assign, size + 1);
return;
}
@@ -748,10 +768,11 @@ export default class Tokenizer extends ParserErrors {
if (next === charCodes.equalsTo) {
// <= | >=
size = 2;
this.finishOp(tt.relational, 2);
return;
}
this.finishOp(tt.relational, size);
this.finishOp(tt.gt, 1);
}
readToken_eq_excl(code: number): void {
@@ -963,8 +984,11 @@ export default class Tokenizer extends ParserErrors {
return;
case charCodes.lessThan:
this.readToken_lt();
return;
case charCodes.greaterThan:
this.readToken_lt_gt(code);
this.readToken_gt();
return;
case charCodes.equalsTo:

2
packages/babel-parser/src/tokenizer/types.js
View File

@@ -200,6 +200,8 @@ export const tt: { [name: string]: TokenType } = {
bitwiseXOR: createBinop("^", 4),
bitwiseAND: createBinop("&", 5),
equality: createBinop("==/!=/===/!==", 6),
lt: createBinop("</>/<=/>=", 7),
gt: createBinop("</>/<=/>=", 7),
relational: createBinop("</>/<=/>=", 7),
bitShift: createBinop("<</>>/>>>", 8),
plusMin: createToken("+/-", { beforeExpr, binop: 9, prefix, startsExpr }),