From 46d2f69ec61c7dc2fde2f029212aa6e4d69c4757 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Wed, 23 Jun 2021 17:12:02 +0200
Subject: [PATCH] Only forbid await inside class field init values

So that it can be used in computed properties in classes.

Makes the test262 suite run again.

Issue #1048
---
 acorn/src/scopeflags.js |  3 +--
 acorn/src/state.js      | 11 ++++-------
 acorn/src/statement.js  |  7 +------
 3 files changed, 6 insertions(+), 15 deletions(-)

diff --git a/acorn/src/scopeflags.js b/acorn/src/scopeflags.js
index 81c8c92d3..d8b5b8d27 100644
--- a/acorn/src/scopeflags.js
+++ b/acorn/src/scopeflags.js
@@ -8,8 +8,7 @@ export const
     SCOPE_ARROW = 16,
     SCOPE_SIMPLE_CATCH = 32,
     SCOPE_SUPER = 64,
-    SCOPE_DIRECT_SUPER = 128,
-    SCOPE_CLASS = 256
+    SCOPE_DIRECT_SUPER = 128
 
 export function functionFlags(async, generator) {
   return SCOPE_FUNCTION | (async ? SCOPE_ASYNC : 0) | (generator ? SCOPE_GENERATOR : 0)
diff --git a/acorn/src/state.js b/acorn/src/state.js
index c742460cc..563847672 100644
--- a/acorn/src/state.js
+++ b/acorn/src/state.js
@@ -3,10 +3,7 @@ import {types as tt} from "./tokentype.js"
 import {lineBreak} from "./whitespace.js"
 import {getOptions} from "./options.js"
 import {wordsRegexp} from "./util.js"
-import {
-  SCOPE_TOP, SCOPE_FUNCTION, SCOPE_ASYNC, SCOPE_CLASS, SCOPE_GENERATOR,
-  SCOPE_SUPER, SCOPE_DIRECT_SUPER
-} from "./scopeflags.js"
+import {SCOPE_TOP, SCOPE_FUNCTION, SCOPE_ASYNC, SCOPE_GENERATOR, SCOPE_SUPER, SCOPE_DIRECT_SUPER} from "./scopeflags.js"
 
 export class Parser {
   constructor(options, input, startPos) {
@@ -105,9 +102,9 @@ export class Parser {
   get inAsync() { return (this.currentVarScope().flags & SCOPE_ASYNC) > 0 && !this.currentVarScope().inClassFieldInit }
   get canAwait() {
     for (let i = this.scopeStack.length - 1; i >= 0; i--) {
-      let {flags} = this.scopeStack[i]
-      if (flags & SCOPE_FUNCTION) return (flags & SCOPE_ASYNC) > 0
-      if (flags & SCOPE_CLASS) return false
+      let scope = this.scopeStack[i]
+      if (scope.inClassFieldInit) return false
+      if (scope.flags & SCOPE_FUNCTION) return (scope.flags & SCOPE_ASYNC) > 0
     }
     return (this.inModule && this.options.ecmaVersion >= 13) || this.options.allowAwaitOutsideFunction
   }
diff --git a/acorn/src/statement.js b/acorn/src/statement.js
index 5063d149a..a9eb51e1a 100644
--- a/acorn/src/statement.js
+++ b/acorn/src/statement.js
@@ -4,10 +4,7 @@ import {lineBreak, skipWhiteSpace} from "./whitespace.js"
 import {isIdentifierStart, isIdentifierChar, keywordRelationalOperator} from "./identifier.js"
 import {has} from "./util.js"
 import {DestructuringErrors} from "./parseutil.js"
-import {
-  functionFlags, SCOPE_SIMPLE_CATCH, SCOPE_CLASS, BIND_SIMPLE_CATCH,
-  BIND_LEXICAL, BIND_VAR, BIND_FUNCTION
-} from "./scopeflags.js"
+import {functionFlags, SCOPE_SIMPLE_CATCH, BIND_SIMPLE_CATCH, BIND_LEXICAL, BIND_VAR, BIND_FUNCTION} from "./scopeflags.js"
 
 const pp = Parser.prototype
 
@@ -584,7 +581,6 @@ pp.parseClass = function(node, isStatement) {
   let hadConstructor = false
   classBody.body = []
   this.expect(tt.braceL)
-  this.enterScope(SCOPE_CLASS)
   while (this.type !== tt.braceR) {
     const element = this.parseClassElement(node.superClass !== null)
     if (element) {
@@ -601,7 +597,6 @@ pp.parseClass = function(node, isStatement) {
   this.next()
   node.body = this.finishNode(classBody, "ClassBody")
   this.exitClassBody()
-  this.exitScope()
   return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
 }