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Allow Flowtype's imports and exports when sourceType:script is set. (#771)

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This commit is contained in:
Logan Smyth
2017-10-27 11:55:24 -07:00
committed by GitHub
parent cb6082e98f
commit e4bcd1d0ff
9 changed files with 477 additions and 17 deletions
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40
src/parser/statement.js
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@@ -129,7 +129,7 @@ export default class StatementParser extends ExpressionParser {
case tt.semi:
return this.parseEmptyStatement(node);
case tt._export:
case tt._import:
case tt._import: {
if (
(this.hasPlugin("dynamicImport") &&
this.lookahead().type === tt.parenL) ||
@@ -137,29 +137,26 @@ export default class StatementParser extends ExpressionParser {
)
break;
if (!this.options.allowImportExportEverywhere) {
if (!topLevel) {
this.raise(
this.state.start,
"'import' and 'export' may only appear at the top level",
);
}
if (!this.inModule) {
this.raise(
this.state.start,
`'import' and 'export' may appear only with 'sourceType: "module"'`,
);
}
if (!this.options.allowImportExportEverywhere && !topLevel) {
this.raise(
this.state.start,
"'import' and 'export' may only appear at the top level",
);
}
this.next();
let result;
if (starttype == tt._import) {
return this.parseImport(node);
result = this.parseImport(node);
} else {
return this.parseExport(node);
result = this.parseExport(node);
}
this.assertModuleNodeAllowed(node);
return result;
}
case tt.name:
if (this.state.value === "async") {
// peek ahead and see if next token is a function
@@ -193,6 +190,15 @@ export default class StatementParser extends ExpressionParser {
}
}
assertModuleNodeAllowed(node: N.Node): void {
if (!this.options.allowImportExportEverywhere && !this.inModule) {
this.raise(
node.start,
`'import' and 'export' may appear only with 'sourceType: "module"'`,
);
}
}
takeDecorators(node: N.HasDecorators): void {
const decorators = this.state.decoratorStack[
this.state.decoratorStack.length - 1