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support for [await]...of statements (#4627)

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Alex Lam S.L
2021-02-08 20:28:23 +00:00
committed by GitHub
parent aedc1e7fc9
commit e13d1e9969
11 changed files with 203 additions and 64 deletions
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21
lib/ast.js
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@@ -422,11 +422,11 @@ var AST_For = DEFNODE("For", "init condition step", {
},
}, AST_IterationStatement);
var AST_ForIn = DEFNODE("ForIn", "init object", {
$documentation: "A `for ... in` statement",
var AST_ForEnumeration = DEFNODE("ForEnumeration", "init object", {
$documentation: "Base class for enumeration loops, i.e. `for ... in`, `for ... of` & `for await ... of`",
$propdoc: {
init: "[AST_Node] the `for/in` initialization code",
object: "[AST_Node] the object that we're looping through"
init: "[AST_Node] the assignment target during iteration",
object: "[AST_Node] the object to iterate over"
},
walk: function(visitor) {
var node = this;
@@ -437,6 +437,7 @@ var AST_ForIn = DEFNODE("ForIn", "init object", {
});
},
_validate: function() {
if (this.TYPE == "ForEnumeration") throw new Error("should not instantiate AST_ForEnumeration");
if (this.init instanceof AST_Definitions) {
if (this.init.definitions.length != 1) throw new Error("init must have single declaration");
} else {
@@ -450,6 +451,18 @@ var AST_ForIn = DEFNODE("ForIn", "init object", {
},
}, AST_IterationStatement);
var AST_ForIn = DEFNODE("ForIn", null, {
$documentation: "A `for ... in` statement",
}, AST_ForEnumeration);
var AST_ForOf = DEFNODE("ForOf", null, {
$documentation: "A `for ... of` statement",
}, AST_ForEnumeration);
var AST_ForAwaitOf = DEFNODE("ForAwaitOf", null, {
$documentation: "A `for await ... of` statement",
}, AST_ForOf);
var AST_With = DEFNODE("With", "expression", {
$documentation: "A `with` statement",
$propdoc: {