1 files changed, 106 insertions, 0 deletions
diff --git a/node_modules/@babel/helper-create-class-features-plugin/lib/misc.js b/node_modules/@babel/helper-create-class-features-plugin/lib/misc.js
new file mode 100644
index 00000000..8a4f662f
--- /dev/null
+++ b/node_modules/@babel/helper-create-class-features-plugin/lib/misc.js
@@ -0,0 +1,106 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.extractComputedKeys = extractComputedKeys;
+exports.injectInitialization = injectInitialization;
+var _core = require("@babel/core");
+var _helperEnvironmentVisitor = require("@babel/helper-environment-visitor");
+const findBareSupers = _core.traverse.visitors.merge([{
+  Super(path) {
+    const {
+      node,
+      parentPath
+    } = path;
+    if (parentPath.isCallExpression({
+      callee: node
+    })) {
+      this.push(parentPath);
+    }
+  }
+}, _helperEnvironmentVisitor.default]);
+const referenceVisitor = {
+  "TSTypeAnnotation|TypeAnnotation"(path) {
+    path.skip();
+  },
+  ReferencedIdentifier(path, {
+    scope
+  }) {
+    if (scope.hasOwnBinding(path.node.name)) {
+      scope.rename(path.node.name);
+      path.skip();
+    }
+  }
+};
+function handleClassTDZ(path, state) {
+  if (state.classBinding && state.classBinding === path.scope.getBinding(path.node.name)) {
+    const classNameTDZError = state.file.addHelper("classNameTDZError");
+    const throwNode = _core.types.callExpression(classNameTDZError, [_core.types.stringLiteral(path.node.name)]);
+    path.replaceWith(_core.types.sequenceExpression([throwNode, path.node]));
+    path.skip();
+  }
+}
+const classFieldDefinitionEvaluationTDZVisitor = {
+  ReferencedIdentifier: handleClassTDZ
+};
+function injectInitialization(path, constructor, nodes, renamer) {
+  if (!nodes.length) return;
+  const isDerived = !!path.node.superClass;
+  if (!constructor) {
+    const newConstructor = _core.types.classMethod("constructor", _core.types.identifier("constructor"), [], _core.types.blockStatement([]));
+    if (isDerived) {
+      newConstructor.params = [_core.types.restElement(_core.types.identifier("args"))];
+      newConstructor.body.body.push(_core.template.statement.ast`super(...args)`);
+    }
+    [constructor] = path.get("body").unshiftContainer("body", newConstructor);
+  }
+  if (renamer) {
+    renamer(referenceVisitor, {
+      scope: constructor.scope
+    });
+  }
+  if (isDerived) {
+    const bareSupers = [];
+    constructor.traverse(findBareSupers, bareSupers);
+    let isFirst = true;
+    for (const bareSuper of bareSupers) {
+      if (isFirst) {
+        bareSuper.insertAfter(nodes);
+        isFirst = false;
+      } else {
+        bareSuper.insertAfter(nodes.map(n => _core.types.cloneNode(n)));
+      }
+    }
+  } else {
+    constructor.get("body").unshiftContainer("body", nodes);
+  }
+}
+function extractComputedKeys(path, computedPaths, file) {
+  const declarations = [];
+  const state = {
+    classBinding: path.node.id && path.scope.getBinding(path.node.id.name),
+    file
+  };
+  for (const computedPath of computedPaths) {
+    const computedKey = computedPath.get("key");
+    if (computedKey.isReferencedIdentifier()) {
+      handleClassTDZ(computedKey, state);
+    } else {
+      computedKey.traverse(classFieldDefinitionEvaluationTDZVisitor, state);
+    }
+    const computedNode = computedPath.node;
+    if (!computedKey.isConstantExpression()) {
+      const ident = path.scope.generateUidIdentifierBasedOnNode(computedNode.key);
+      path.scope.push({
+        id: ident,
+        kind: "let"
+      });
+      declarations.push(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.cloneNode(ident), computedNode.key)));
+      computedNode.key = _core.types.cloneNode(ident);
+    }
+  }
+  return declarations;
+}
+
+//# sourceMappingURL=misc.js.map