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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/@babel/plugin-transform-new-target/lib/index.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/@babel/plugin-transform-new-target/lib/index.js')
-rw-r--r--node_modules/@babel/plugin-transform-new-target/lib/index.js89
1 files changed, 89 insertions, 0 deletions
diff --git a/node_modules/@babel/plugin-transform-new-target/lib/index.js b/node_modules/@babel/plugin-transform-new-target/lib/index.js
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+++ b/node_modules/@babel/plugin-transform-new-target/lib/index.js
@@ -0,0 +1,89 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.default = void 0;
+
+function _helperPluginUtils() {
+ const data = require("@babel/helper-plugin-utils");
+
+ _helperPluginUtils = function _helperPluginUtils() {
+ return data;
+ };
+
+ return data;
+}
+
+function _core() {
+ const data = require("@babel/core");
+
+ _core = function _core() {
+ return data;
+ };
+
+ return data;
+}
+
+var _default = (0, _helperPluginUtils().declare)(api => {
+ api.assertVersion(7);
+ return {
+ name: "transform-new-target",
+ visitor: {
+ MetaProperty(path) {
+ const meta = path.get("meta");
+ const property = path.get("property");
+ const scope = path.scope;
+
+ if (meta.isIdentifier({
+ name: "new"
+ }) && property.isIdentifier({
+ name: "target"
+ })) {
+ const func = path.findParent(path => {
+ if (path.isClass()) return true;
+
+ if (path.isFunction() && !path.isArrowFunctionExpression()) {
+ if (path.isClassMethod({
+ kind: "constructor"
+ })) {
+ return false;
+ }
+
+ return true;
+ }
+
+ return false;
+ });
+
+ if (!func) {
+ throw path.buildCodeFrameError("new.target must be under a (non-arrow) function or a class.");
+ }
+
+ const node = func.node;
+
+ if (!node.id) {
+ if (func.isMethod()) {
+ path.replaceWith(scope.buildUndefinedNode());
+ return;
+ }
+
+ node.id = scope.generateUidIdentifier("target");
+ }
+
+ const constructor = _core().types.memberExpression(_core().types.thisExpression(), _core().types.identifier("constructor"));
+
+ if (func.isClass()) {
+ path.replaceWith(constructor);
+ return;
+ }
+
+ path.replaceWith(_core().types.conditionalExpression(_core().types.binaryExpression("instanceof", _core().types.thisExpression(), _core().types.cloneNode(node.id)), constructor, scope.buildUndefinedNode()));
+ }
+ }
+
+ }
+ };
+});
+
+exports.default = _default; \ No newline at end of file