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Move array reference into for head initializer (#9698)

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* Move array reference into for head initializer

* Update packages/babel-plugin-transform-for-of/src/index.js

Co-Authored-By: danez <daniel@tschinder.de>

* Fix tests
This commit is contained in:
Daniel Tschinder
2019-03-23 17:57:17 -07:00
committed by GitHub
parent d610289812
commit a559397feb
9 changed files with 26 additions and 56 deletions
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18
packages/babel-plugin-transform-for-of/src/index.js
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@@ -70,7 +70,7 @@ export default declare((api, options) => {
: pushComputedPropsSpec;
const buildForOfArray = template(`
for (var KEY = 0; KEY < ARR.length; KEY++) BODY;
for (var KEY = 0, NAME = ARR; KEY < NAME.length; KEY++) BODY;
`);
const buildForOfLoose = template(`
@@ -119,20 +119,14 @@ export default declare((api, options) => {
function _ForOfStatementArray(path) {
const { node, scope } = path;
const uid = scope.generateUid("arr");
const nodes = [
t.variableDeclaration("var", [
t.variableDeclarator(t.identifier(uid), node.right),
]),
];
const right = t.identifier(uid);
const right = scope.generateUidIdentifierBasedOnNode(node.right, "arr");
const iterationKey = scope.generateUidIdentifier("i");
let loop = buildForOfArray({
BODY: node.body,
KEY: iterationKey,
ARR: right,
NAME: right,
ARR: node.right,
});
t.inherits(loop, node);
@@ -160,9 +154,7 @@ export default declare((api, options) => {
loop = t.labeledStatement(path.parentPath.node.label, loop);
}
nodes.push(loop);
return nodes;
return [loop];
}
function replaceWithArray(path) {