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support SpreadElement in destructuring - fixes #128

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This commit is contained in:
Sebastian McKenzie 2014-11-07 20:46:02 +11:00
parent b3206d94a6
commit f8e8cd3979
3 changed files with 25 additions and 1 deletions
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10
lib/6to5/transformers/destructuring.js
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@ -40,7 +40,15 @@ var pushArrayPattern = function (kind, nodes, pattern, parentId) {
_.each(pattern.elements, function (elem, i) {
if (!elem) return;
var newPatternId = t.memberExpression(parentId, t.literal(i), true);
var newPatternId;
if (t.isSpreadElement(elem)) {
newPatternId = t.callExpression(t.memberExpression(parentId, t.identifier("slice")), [t.literal(i)]);
elem = elem.argument;
} else {
newPatternId = t.memberExpression(parentId, t.literal(i), true);
}
push(kind, nodes, elem, newPatternId);
});
};

5
test/fixtures/transformation/destructuring/spread/actual.js vendored Normal file
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@ -0,0 +1,5 @@
var isSorted = ([x, y, ...wow]) => {
if (!zs.length) return true
if (y > x) return isSorted(zs)
return false
};

11
test/fixtures/transformation/destructuring/spread/expected.js vendored Normal file
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@ -0,0 +1,11 @@
"use strict";
var isSorted = function (_ref) {
var x = _ref[0];
var y = _ref[1];
var wow = _ref.slice(2);
if (!zs.length) return true;
if (y > x) return isSorted(zs);
return false;
};