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Non-destructuring default parameters

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This commit is contained in:
Fábio Santos
2015-11-22 17:40:05 +00:00
committed by Richard van Velzen
parent 7f3dbb6df7
commit 084437bc6d
3 changed files with 39 additions and 4 deletions
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17
lib/ast.js
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@@ -422,6 +422,13 @@ var AST_ArrowParametersOrSeq = DEFNODE("ArrowParametersOrSeq", "expressions", {
is_array: true,
names: ex.elements.map(to_fun_args)
});
} else if (ex instanceof AST_Assign && ex.left instanceof AST_Symbol) {
return new AST_SymbolFunarg({
name: ex.left.name,
default: ex.right,
start: ex.start,
end: ex.end
});
} else {
croak("Invalid function parameter", ex.start.line, ex.start.col);
}
@@ -1026,8 +1033,16 @@ var AST_SymbolConst = DEFNODE("SymbolConst", null, {
$documentation: "A constant declaration"
}, AST_SymbolDeclaration);
var AST_SymbolFunarg = DEFNODE("SymbolFunarg", null, {
var AST_SymbolFunarg = DEFNODE("SymbolFunarg", "default", {
$documentation: "Symbol naming a function argument",
$propdoc: {
default: "[AST_Expression] The default for this parameter. For example, `= 6`"
},
_walk: function (visitor) {
return visitor._visit(this, function() {
if (this.default) this.default._walk(visitor);
});
}
}, AST_SymbolVar);
var AST_SymbolDefun = DEFNODE("SymbolDefun", null, {