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improve compatibility with use strict (#5440)

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This commit is contained in:
Alex Lam S.L
2022-05-14 05:15:54 +01:00
committed by GitHub
parent 8946c87011
commit e31bbe329a
6 changed files with 441 additions and 37 deletions
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21
lib/ast.js
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@@ -827,6 +827,9 @@ var AST_Class = DEFNODE("Class", "extends name properties", {
extends: "[AST_Node?] the super class, or null if not specified",
properties: "[AST_ClassProperty*] array of class properties",
},
resolve: function(def_class) {
return def_class ? this : this.parent_scope.resolve();
},
walk: function(visitor) {
var node = this;
visitor.visit(node, function() {
@@ -851,9 +854,6 @@ var AST_DefClass = DEFNODE("DefClass", null, {
$propdoc: {
name: "[AST_SymbolDefClass] the name of this class",
},
resolve: function(def_class) {
return def_class ? this : this.parent_scope.resolve();
},
_validate: function() {
if (!(this.name instanceof AST_SymbolDefClass)) throw new Error("name must be AST_SymbolDefClass");
},
@@ -1837,7 +1837,7 @@ var AST_Label = DEFNODE("Label", "references", {
initialize: function() {
this.references = [];
this.thedef = this;
}
},
}, AST_Symbol);
var AST_SymbolRef = DEFNODE("SymbolRef", "fixed in_arg redef", {
@@ -2039,16 +2039,21 @@ TreeWalker.prototype = {
return this.stack[this.stack.length - 2 - (n || 0)];
},
push: function(node) {
if (node instanceof AST_Lambda) {
var value;
if (node instanceof AST_Class) {
this.directives = Object.create(this.directives);
value = "use strict";
} else if (node instanceof AST_Directive) {
value = node.value;
} else if (node instanceof AST_Lambda) {
this.directives = Object.create(this.directives);
} else if (node instanceof AST_Directive && !this.directives[node.value]) {
this.directives[node.value] = node;
}
if (value && !this.directives[value]) this.directives[value] = node;
this.stack.push(node);
},
pop: function() {
var node = this.stack.pop();
if (node instanceof AST_Lambda) {
if (node instanceof AST_Class || node instanceof AST_Lambda) {
this.directives = Object.getPrototypeOf(this.directives);
}
},