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fix: Class Field Initializer should not allow await expression as immediate child (#10946)

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* fix: scope.inAsync should exclude reference in class property initializers

* chore: add test on await in computed class property

* fix flow error :(
This commit is contained in:
Huáng Jùnliàng
2019-12-31 09:36:03 -05:00
committed by GitHub
parent 0238244268
commit 26eb891870
17 changed files with 1348 additions and 1 deletions
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15
packages/babel-parser/src/util/scope.js
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@@ -55,8 +55,21 @@ export default class ScopeHandler<IScope: Scope = Scope> {
get inGenerator() {
return (this.currentVarScope().flags & SCOPE_GENERATOR) > 0;
}
// the following loop always exit because SCOPE_PROGRAM is SCOPE_VAR
// $FlowIgnore
get inAsync() {
return (this.currentVarScope().flags & SCOPE_ASYNC) > 0;
for (let i = this.scopeStack.length - 1; ; i--) {
const scope = this.scopeStack[i];
const isVarScope = scope.flags & SCOPE_VAR;
const isClassScope = scope.flags & SCOPE_CLASS;
if (isClassScope && !isVarScope) {
// If it meets a class scope before a var scope, it means it is a class property initializer
// which does not have an [Await] parameter in its grammar
return false;
} else if (isVarScope) {
return (scope.flags & SCOPE_ASYNC) > 0;
}
}
}
get allowSuper() {
return (this.currentThisScope().flags & SCOPE_SUPER) > 0;