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Annotating transformed classes with #__PURE__ comment (#6209)

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This commit is contained in:
Mateusz Burzyński
2017-09-11 17:18:37 +02:00
committed by Henry Zhu
parent c4f6a7a06f
commit c47258d68c
81 changed files with 299 additions and 112 deletions
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12
packages/babel-plugin-transform-es2015-classes/src/index.js
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@@ -2,6 +2,8 @@ import LooseTransformer from "./loose";
import VanillaTransformer from "./vanilla";
import nameFunction from "babel-helper-function-name";
const PURE_ANNOTATION = "#__PURE__";
export default function({ types: t }) {
// todo: investigate traversal requeueing
const VISITED = Symbol();
@@ -51,11 +53,11 @@ export default function({ types: t }) {
path.replaceWith(new Constructor(path, state.file).run());
if (
path.isCallExpression() &&
path.get("callee").isArrowFunctionExpression()
) {
path.get("callee").arrowFunctionToExpression();
if (path.isCallExpression()) {
path.addComment("leading", PURE_ANNOTATION);
if (path.get("callee").isArrowFunctionExpression()) {
path.get("callee").arrowFunctionToExpression();
}
}
},
},