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retrofit AST_BlockStatement as block-scoped (#4177)

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This commit is contained in:
Alex Lam S.L
2020-10-04 18:58:50 +01:00
committed by GitHub
parent 58ac5b9bd5
commit f9946767c9
6 changed files with 104 additions and 59 deletions
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61
lib/ast.js
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@@ -251,9 +251,40 @@ var AST_Block = DEFNODE("Block", "body", {
},
}, AST_Statement);
var AST_BlockScope = DEFNODE("BlockScope", "enclosed functions make_def parent_scope variables", {
$documentation: "Base class for all statements introducing a lexical scope",
$propdoc: {
enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes",
functions: "[Object/S] like `variables`, but only lists function declarations",
parent_scope: "[AST_Scope?/S] link to the parent scope",
variables: "[Object/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
},
clone: function(deep) {
var node = this._clone(deep);
if (this.enclosed) node.enclosed = this.enclosed.slice();
if (this.functions) node.functions = this.functions.clone();
if (this.variables) node.variables = this.variables.clone();
return node;
},
pinned: function() {
return this.resolve().pinned();
},
resolve: function() {
return this.parent_scope.resolve();
},
_validate: function() {
if (this.parent_scope == null) return;
if (!(this.parent_scope instanceof AST_BlockScope)) throw new Error("parent_scope must be AST_BlockScope");
if (!(this.resolve() instanceof AST_Scope)) throw new Error("must be contained within AST_Scope");
},
}, AST_Block);
var AST_BlockStatement = DEFNODE("BlockStatement", null, {
$documentation: "A block statement",
}, AST_Block);
initialize: function() {
this.variables = new Dictionary();
},
}, AST_BlockScope);
var AST_EmptyStatement = DEFNODE("EmptyStatement", null, {
$documentation: "The empty statement (empty block or simply a semicolon)"
@@ -412,34 +443,6 @@ var AST_With = DEFNODE("With", "expression", {
/* -----[ scope and functions ]----- */
var AST_BlockScope = DEFNODE("BlockScope", "enclosed functions make_def parent_scope variables", {
$documentation: "Base class for all statements introducing a lexical scope",
$propdoc: {
enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes",
functions: "[Object/S] like `variables`, but only lists function declarations",
parent_scope: "[AST_Scope?/S] link to the parent scope",
variables: "[Object/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
},
clone: function(deep) {
var node = this._clone(deep);
if (this.enclosed) node.enclosed = this.enclosed.slice();
if (this.functions) node.functions = this.functions.clone();
if (this.variables) node.variables = this.variables.clone();
return node;
},
pinned: function() {
return this.resolve().pinned();
},
resolve: function() {
return this.parent_scope.resolve();
},
_validate: function() {
if (this.parent_scope == null) return;
if (!(this.parent_scope instanceof AST_BlockScope)) throw new Error("parent_scope must be AST_BlockScope");
if (!(this.resolve() instanceof AST_Scope)) throw new Error("must be contained within AST_Scope");
},
}, AST_Block);
var AST_Scope = DEFNODE("Scope", "cname uses_eval uses_with", {
$documentation: "Base class for all statements introducing a lexical scope",
$propdoc: {