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perf: Ensure canInsertSemicolon is always called last

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It does a lot of checks and a regex test
This commit is contained in:
Daniel Tschinder
2019-01-15 23:32:18 -08:00
parent 455e003567
commit 58768072ef
2 changed files with 7 additions and 6 deletions
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11
packages/babel-parser/src/parser/expression.js
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@@ -869,9 +869,9 @@ export default class ExpressionParser extends LValParser {
return this.parseFunction(node, false, false, true);
} else if (
canBeArrow &&
!this.canInsertSemicolon() &&
id.name === "async" &&
this.match(tt.name)
this.match(tt.name) &&
!this.canInsertSemicolon()
) {
const oldYOAIPAP = this.state.yieldOrAwaitInPossibleArrowParameters;
const oldInAsync = this.state.inAsync;
@@ -886,7 +886,8 @@ export default class ExpressionParser extends LValParser {
return node;
}
if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
if (canBeArrow && this.match(tt.arrow) && !this.canInsertSemicolon()) {
this.next();
const oldYOAIPAP = this.state.yieldOrAwaitInPossibleArrowParameters;
this.state.yieldOrAwaitInPossibleArrowParameters = null;
this.parseArrowExpression(node, [id]);
@@ -2076,8 +2077,8 @@ export default class ExpressionParser extends LValParser {
this.next();
if (
this.match(tt.semi) ||
this.canInsertSemicolon() ||
(!this.match(tt.star) && !this.state.type.startsExpr)
(!this.match(tt.star) && !this.state.type.startsExpr) ||
this.canInsertSemicolon()
) {
node.delegate = false;
node.argument = null;