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support destructuring of catch variable (#4412)

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This commit is contained in:
Alex Lam S.L
2020-12-19 12:28:38 +08:00
committed by GitHub
parent 0f55bd92f1
commit e6dd471f8f
5 changed files with 120 additions and 50 deletions
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10
lib/ast.js
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@@ -786,7 +786,7 @@ var AST_Try = DEFNODE("Try", "bcatch bfinally", {
var AST_Catch = DEFNODE("Catch", "argname", {
$documentation: "A `catch` node; only makes sense as part of a `try` statement",
$propdoc: {
argname: "[AST_SymbolCatch?] symbol for the exception, or null if not present",
argname: "[(AST_Destructured|AST_SymbolCatch)?] symbol for the exception, or null if not present",
},
walk: function(visitor) {
var node = this;
@@ -796,9 +796,9 @@ var AST_Catch = DEFNODE("Catch", "argname", {
});
},
_validate: function() {
if (this.argname != null) {
if (!(this.argname instanceof AST_SymbolCatch)) throw new Error("argname must be AST_SymbolCatch");
}
if (this.argname != null) validate_destructured(this.argname, function(node) {
if (!(node instanceof AST_SymbolCatch)) throw new Error("argname must be AST_SymbolCatch");
});
},
}, AST_Block);
@@ -868,7 +868,7 @@ var AST_Var = DEFNODE("Var", null, {
var AST_VarDef = DEFNODE("VarDef", "name value", {
$documentation: "A variable declaration; only appears in a AST_Definitions node",
$propdoc: {
name: "[AST_SymbolVar] name of the variable",
name: "[AST_Destructured|AST_SymbolVar] name of the variable",
value: "[AST_Node?] initializer, or null of there's no initializer"
},
walk: function(visitor) {