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support let (#4227)

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This commit is contained in:
Alex Lam S.L
2020-10-19 01:32:39 +01:00
committed by GitHub
parent 6c7226c10e
commit 96bf7fceab
10 changed files with 1186 additions and 152 deletions
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15
lib/ast.js
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@@ -754,6 +754,17 @@ var AST_Const = DEFNODE("Const", null, {
},
}, AST_Definitions);
var AST_Let = DEFNODE("Let", null, {
$documentation: "A `let` statement",
_validate: function() {
this.definitions.forEach(function(node) {
if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
if (!(node.name instanceof AST_SymbolLet)) throw new Error("name must be AST_SymbolLet");
if (node.value != null) must_be_expression(node, "value");
});
},
}, AST_Definitions);
var AST_Var = DEFNODE("Var", null, {
$documentation: "A `var` statement",
_validate: function() {
@@ -1066,6 +1077,10 @@ var AST_SymbolConst = DEFNODE("SymbolConst", null, {
$documentation: "Symbol defining a constant",
}, AST_SymbolDeclaration);
var AST_SymbolLet = DEFNODE("SymbolLet", null, {
$documentation: "Symbol defining a lexical-scoped variable",
}, AST_SymbolDeclaration);
var AST_SymbolVar = DEFNODE("SymbolVar", null, {
$documentation: "Symbol defining a variable",
}, AST_SymbolDeclaration);