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add patterns support

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This commit is contained in:
Ondrej Kraus 2015-02-25 04:30:17 +01:00
parent 8ca854156a
commit e677c72d58
1 changed files with 11 additions and 16 deletions
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27
src/babel/transformation/transformers/es6/parameters.rest.js
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@ -64,6 +64,17 @@ exports.Function = function (node, parent, scope) {
// otherwise `arguments` will be remapped in arrow functions
argsId._ignoreAliasFunctions = true;
// support patterns
if (t.isPattern(rest)) {
var pattern = rest;
rest = scope.generateUidIdentifier("ref");
var declar = t.variableDeclaration("var", pattern.elements.map(function (elem, index) {
var accessExpr = t.memberExpression(rest, t.literal(index));
return t.variableDeclarator(elem, accessExpr);
}));
node.body.body.unshift(declar);
}
// check if rest is used only in member expressions
var restOuterDeclar = scope.getBindingIdentifier(rest.name);
var state = {
@ -107,22 +118,6 @@ exports.Function = function (node, parent, scope) {
);
}
// support patterns
if (t.isPattern(rest)) {
var pattern = rest;
rest = scope.generateUidIdentifier("ref");
// let the destructuring transformer handle this
var restDeclar = t.variableDeclaration("var", [
t.variableDeclarator(pattern, rest)
]);
// retain evaluation position
restDeclar._blockHoist = node.params.length + 1;
node.body.body.unshift(restDeclar);
}
scope.assignTypeGeneric(rest.name, "Array");
var loop = util.template("rest", {