Changing front

front/app/node_modules/@babel/plugin-transform-block-scoping/lib/index.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _tdz = require("./tdz");
+var _core = require("@babel/core");
+const DONE = new WeakSet();
+var _default = (0, _helperPluginUtils.declare)((api, opts) => {
+  api.assertVersion(7);
+  const {
+    throwIfClosureRequired = false,
+    tdz: tdzEnabled = false
+  } = opts;
+  if (typeof throwIfClosureRequired !== "boolean") {
+    throw new Error(`.throwIfClosureRequired must be a boolean, or undefined`);
+  }
+  if (typeof tdzEnabled !== "boolean") {
+    throw new Error(`.tdz must be a boolean, or undefined`);
+  }
+  return {
+    name: "transform-block-scoping",
+    visitor: {
+      VariableDeclaration(path) {
+        const {
+          node,
+          parent,
+          scope
+        } = path;
+        if (!isBlockScoped(node)) return;
+        convertBlockScopedToVar(path, null, parent, scope, true);
+
+        if (node._tdzThis) {
+          const nodes = [node];
+          for (let i = 0; i < node.declarations.length; i++) {
+            const decl = node.declarations[i];
+            const assign = _core.types.assignmentExpression("=", _core.types.cloneNode(decl.id), decl.init || scope.buildUndefinedNode());
+            _tdz.skipTDZChecks.add(assign);
+            nodes.push(_core.types.expressionStatement(assign));
+            decl.init = this.addHelper("temporalUndefined");
+          }
+
+          node._blockHoist = 2;
+          if (path.isCompletionRecord()) {
+            nodes.push(_core.types.expressionStatement(scope.buildUndefinedNode()));
+          }
+          path.replaceWithMultiple(nodes);
+        }
+      },
+      Loop(path, state) {
+        const {
+          parent,
+          scope
+        } = path;
+        path.ensureBlock();
+        const blockScoping = new BlockScoping(path, path.get("body"), parent, scope, throwIfClosureRequired, tdzEnabled, state);
+        const replace = blockScoping.run();
+        if (replace) path.replaceWith(replace);
+      },
+      CatchClause(path, state) {
+        const {
+          parent,
+          scope
+        } = path;
+        const blockScoping = new BlockScoping(null, path.get("body"), parent, scope, throwIfClosureRequired, tdzEnabled, state);
+        blockScoping.run();
+      },
+      "BlockStatement|SwitchStatement|Program"(path, state) {
+        if (!ignoreBlock(path)) {
+          const blockScoping = new BlockScoping(null, path, path.parent, path.scope, throwIfClosureRequired, tdzEnabled, state);
+          blockScoping.run();
+        }
+      }
+    }
+  };
+});
+exports.default = _default;
+function ignoreBlock(path) {
+  return _core.types.isLoop(path.parent) || _core.types.isCatchClause(path.parent);
+}
+const buildRetCheck = _core.template.statement(`
+  if (typeof RETURN === "object") return RETURN.v;
+`);
+function isBlockScoped(node) {
+  if (!_core.types.isVariableDeclaration(node)) return false;
+  if (
+  node[_core.types.BLOCK_SCOPED_SYMBOL]) {
+    return true;
+  }
+  if (node.kind !== "let" && node.kind !== "const" && node.kind !== "using") {
+    return false;
+  }
+  return true;
+}
+
+function isInLoop(path) {
+  const loopOrFunctionParent = path.find(path => path.isLoop() || path.isFunction());
+  return loopOrFunctionParent == null ? void 0 : loopOrFunctionParent.isLoop();
+}
+function convertBlockScopedToVar(path, node, parent, scope, moveBindingsToParent = false) {
+  if (!node) {
+    node = path.node;
+  }
+
+  if (isInLoop(path) && !_core.types.isFor(parent)) {
+    for (let i = 0; i < node.declarations.length; i++) {
+      const declar = node.declarations[i];
+      declar.init = declar.init || scope.buildUndefinedNode();
+    }
+  }
+
+  node[_core.types.BLOCK_SCOPED_SYMBOL] = true;
+  node.kind = "var";
+
+  if (moveBindingsToParent) {
+    const parentScope = scope.getFunctionParent() || scope.getProgramParent();
+    for (const name of Object.keys(path.getBindingIdentifiers())) {
+      const binding = scope.getOwnBinding(name);
+      if (binding) binding.kind = "var";
+      scope.moveBindingTo(name, parentScope);
+    }
+  }
+}
+function isVar(node) {
+  return _core.types.isVariableDeclaration(node, {
+    kind: "var"
+  }) && !isBlockScoped(node);
+}
+const letReferenceFunctionVisitor = _core.traverse.visitors.merge([{
+  ReferencedIdentifier(path, state) {
+    const ref = state.letReferences.get(path.node.name);
+
+    if (!ref) return;
+
+    const localBinding = path.scope.getBindingIdentifier(path.node.name);
+    if (localBinding && localBinding !== ref) return;
+    state.closurify = true;
+  }
+}, _tdz.visitor]);
+const letReferenceBlockVisitor = _core.traverse.visitors.merge([{
+  Loop: {
+    enter(path, state) {
+      state.loopDepth++;
+    },
+    exit(path, state) {
+      state.loopDepth--;
+    }
+  },
+  FunctionParent(path, state) {
+    if (state.loopDepth > 0) {
+      path.traverse(letReferenceFunctionVisitor, state);
+    } else {
+      path.traverse(_tdz.visitor, state);
+    }
+    return path.skip();
+  }
+}, _tdz.visitor]);
+const hoistVarDeclarationsVisitor = {
+  enter(path, self) {
+    if (path.isForStatement()) {
+      const {
+        node
+      } = path;
+      if (isVar(node.init)) {
+        const nodes = self.pushDeclar(node.init);
+        if (nodes.length === 1) {
+          node.init = nodes[0];
+        } else {
+          node.init = _core.types.sequenceExpression(nodes);
+        }
+      }
+    } else if (path.isForInStatement() || path.isForOfStatement()) {
+      const {
+        node
+      } = path;
+      if (isVar(node.left)) {
+        self.pushDeclar(node.left);
+        node.left = node.left.declarations[0].id;
+      }
+    } else if (isVar(path.node)) {
+      path.replaceWithMultiple(self.pushDeclar(path.node).map(expr => _core.types.expressionStatement(expr)));
+    } else if (path.isFunction()) {
+      return path.skip();
+    }
+  }
+};
+const loopLabelVisitor = {
+  LabeledStatement({
+    node
+  }, state) {
+    state.innerLabels.push(node.label.name);
+  }
+};
+const continuationVisitor = {
+  enter(path, state) {
+    if (path.isAssignmentExpression() || path.isUpdateExpression()) {
+      for (const name of Object.keys(path.getBindingIdentifiers())) {
+        if (state.outsideReferences.get(name) !== path.scope.getBindingIdentifier(name)) {
+          continue;
+        }
+        state.reassignments[name] = true;
+      }
+    } else if (path.isReturnStatement()) {
+      state.returnStatements.push(path);
+    }
+  }
+};
+function loopNodeTo(node) {
+  if (_core.types.isBreakStatement(node)) {
+    return "break";
+  } else if (_core.types.isContinueStatement(node)) {
+    return "continue";
+  }
+}
+const loopVisitor = {
+  Loop(path, state) {
+    const oldIgnoreLabeless = state.ignoreLabeless;
+    state.ignoreLabeless = true;
+    path.traverse(loopVisitor, state);
+    state.ignoreLabeless = oldIgnoreLabeless;
+    path.skip();
+  },
+  Function(path) {
+    path.skip();
+  },
+  SwitchCase(path, state) {
+    const oldInSwitchCase = state.inSwitchCase;
+    state.inSwitchCase = true;
+    path.traverse(loopVisitor, state);
+    state.inSwitchCase = oldInSwitchCase;
+    path.skip();
+  },
+  "BreakStatement|ContinueStatement|ReturnStatement"(path, state) {
+    const {
+      node,
+      scope
+    } = path;
+    if (state.loopIgnored.has(node)) return;
+    let replace;
+    let loopText = loopNodeTo(node);
+    if (loopText) {
+      if (_core.types.isReturnStatement(node)) {
+        throw new Error("Internal error: unexpected return statement with `loopText`");
+      }
+      if (node.label) {
+        if (state.innerLabels.indexOf(node.label.name) >= 0) {
+          return;
+        }
+        loopText = `${loopText}|${node.label.name}`;
+      } else {
+        if (state.ignoreLabeless) return;
+
+        if (_core.types.isBreakStatement(node) && state.inSwitchCase) return;
+      }
+      state.hasBreakContinue = true;
+      state.map.set(loopText, node);
+      replace = _core.types.stringLiteral(loopText);
+    }
+    if (_core.types.isReturnStatement(node)) {
+      state.hasReturn = true;
+      replace = _core.types.objectExpression([_core.types.objectProperty(_core.types.identifier("v"), node.argument || scope.buildUndefinedNode())]);
+    }
+    if (replace) {
+      replace = _core.types.returnStatement(replace);
+      state.loopIgnored.add(replace);
+      path.skip();
+      path.replaceWith(_core.types.inherits(replace, node));
+    }
+  }
+};
+function isStrict(path) {
+  return !!path.find(({
+    node
+  }) => {
+    if (_core.types.isProgram(node)) {
+      if (node.sourceType === "module") return true;
+    } else if (!_core.types.isBlockStatement(node)) return false;
+    return node.directives.some(directive => directive.value.value === "use strict");
+  });
+}
+class BlockScoping {
+
+  constructor(loopPath, blockPath, parent, scope, throwIfClosureRequired, tdzEnabled, state) {
+    this.parent = void 0;
+    this.state = void 0;
+    this.scope = void 0;
+    this.throwIfClosureRequired = void 0;
+    this.tdzEnabled = void 0;
+    this.blockPath = void 0;
+    this.block = void 0;
+    this.outsideLetReferences = void 0;
+    this.hasLetReferences = void 0;
+    this.letReferences = void 0;
+    this.body = void 0;
+    this.loopParent = void 0;
+    this.loopLabel = void 0;
+    this.loopPath = void 0;
+    this.loop = void 0;
+    this.has = void 0;
+    this.parent = parent;
+    this.scope = scope;
+    this.state = state;
+    this.throwIfClosureRequired = throwIfClosureRequired;
+    this.tdzEnabled = tdzEnabled;
+    this.blockPath = blockPath;
+    this.block = blockPath.node;
+    this.outsideLetReferences = new Map();
+    this.hasLetReferences = false;
+    this.letReferences = new Map();
+    this.body = [];
+    if (loopPath) {
+      this.loopParent = loopPath.parent;
+      this.loopLabel = _core.types.isLabeledStatement(this.loopParent) && this.loopParent.label;
+      this.loopPath = loopPath;
+      this.loop = loopPath.node;
+    }
+  }
+
+  run() {
+    const block = this.block;
+    if (DONE.has(block)) return;
+    DONE.add(block);
+    const needsClosure = this.getLetReferences();
+    this.checkConstants();
+
+    if (_core.types.isFunction(this.parent) || _core.types.isProgram(this.block)) {
+      this.updateScopeInfo();
+      return;
+    }
+
+    if (!this.hasLetReferences) return;
+    if (needsClosure) {
+      this.wrapClosure();
+    } else {
+      this.remap();
+    }
+    this.updateScopeInfo(needsClosure);
+    if (this.loopLabel && !_core.types.isLabeledStatement(this.loopParent)) {
+      return _core.types.labeledStatement(this.loopLabel, this.loop);
+    }
+  }
+  checkConstants() {
+    const constBindings = new Map();
+
+    for (const scope of new Set([this.scope, this.blockPath.scope])) {
+      for (const name of Object.keys(scope.bindings)) {
+        const binding = scope.bindings[name];
+        if (binding.kind === "const") constBindings.set(name, binding);
+      }
+    }
+    const {
+      state
+    } = this;
+    for (const [name, binding] of constBindings) {
+      for (const violation of binding.constantViolations) {
+        const readOnlyError = state.addHelper("readOnlyError");
+        const throwNode = _core.types.callExpression(readOnlyError, [_core.types.stringLiteral(name)]);
+        if (violation.isAssignmentExpression()) {
+          const {
+            operator
+          } = violation.node;
+          if (operator === "=") {
+            violation.replaceWith(_core.types.sequenceExpression([violation.get("right").node, throwNode]));
+          } else if (["&&=", "||=", "??="].includes(operator)) {
+            violation.replaceWith(_core.types.logicalExpression(
+            operator.slice(0, -1), violation.get("left").node, _core.types.sequenceExpression([violation.get("right").node, throwNode])));
+          } else {
+            violation.replaceWith(_core.types.sequenceExpression([_core.types.binaryExpression(
+            operator.slice(0, -1), violation.get("left").node, violation.get("right").node), throwNode]));
+          }
+        } else if (violation.isUpdateExpression()) {
+          violation.replaceWith(_core.types.sequenceExpression([_core.types.unaryExpression("+", violation.get("argument").node), throwNode]));
+        } else if (violation.isForXStatement()) {
+          violation.ensureBlock();
+          violation.get("left").replaceWith(_core.types.variableDeclaration("var", [_core.types.variableDeclarator(violation.scope.generateUidIdentifier(name))]));
+          violation.node.body.body.unshift(_core.types.expressionStatement(throwNode));
+        }
+      }
+    }
+  }
+  updateScopeInfo(wrappedInClosure) {
+    const blockScope = this.blockPath.scope;
+    const parentScope = blockScope.getFunctionParent() || blockScope.getProgramParent();
+    const letRefs = this.letReferences;
+    for (const key of letRefs.keys()) {
+      const ref = letRefs.get(key);
+      const binding = blockScope.getBinding(ref.name);
+      if (!binding) continue;
+      if (binding.kind === "let" || binding.kind === "const") {
+        binding.kind = "var";
+        if (wrappedInClosure) {
+          if (blockScope.hasOwnBinding(ref.name)) {
+            blockScope.removeBinding(ref.name);
+          }
+        } else {
+          blockScope.moveBindingTo(ref.name, parentScope);
+        }
+      }
+    }
+  }
+  remap() {
+    const letRefs = this.letReferences;
+    const outsideLetRefs = this.outsideLetReferences;
+    const scope = this.scope;
+    const blockPathScope = this.blockPath.scope;
+
+    for (const key of letRefs.keys()) {
+      const ref = letRefs.get(key);
+
+      if (scope.parentHasBinding(key) || scope.hasGlobal(key)) {
+        const binding = scope.getOwnBinding(key);
+        if (binding) {
+          const parentBinding = scope.parent.getOwnBinding(key);
+          if (binding.kind === "hoisted" &&
+          !binding.path.node.async &&
+          !binding.path.node.generator && (!parentBinding || isVar(parentBinding.path.parent)) && !isStrict(binding.path.parentPath)) {
+            continue;
+          }
+          scope.rename(ref.name);
+        }
+        if (blockPathScope.hasOwnBinding(key)) {
+          blockPathScope.rename(ref.name);
+        }
+      }
+    }
+    for (const key of outsideLetRefs.keys()) {
+      const ref = letRefs.get(key);
+      if (isInLoop(this.blockPath) && blockPathScope.hasOwnBinding(key)) {
+        blockPathScope.rename(ref.name);
+      }
+    }
+  }
+  wrapClosure() {
+    if (this.throwIfClosureRequired) {
+      throw this.blockPath.buildCodeFrameError("Compiling let/const in this block would add a closure " + "(throwIfClosureRequired).");
+    }
+    const block = this.block;
+    const outsideRefs = this.outsideLetReferences;
+
+    if (this.loop) {
+      for (const name of Array.from(outsideRefs.keys())) {
+        const id = outsideRefs.get(name);
+        if (this.scope.hasGlobal(id.name) || this.scope.parentHasBinding(id.name)) {
+          outsideRefs.delete(id.name);
+          this.letReferences.delete(id.name);
+          this.scope.rename(id.name);
+          this.letReferences.set(id.name, id);
+          outsideRefs.set(id.name, id);
+        }
+      }
+    }
+
+    this.has = this.checkLoop();
+
+    this.hoistVarDeclarations();
+
+    const args = Array.from(outsideRefs.values(), node => _core.types.cloneNode(node));
+    const params = args.map(id => _core.types.cloneNode(id));
+    const isSwitch = block.type === "SwitchStatement";
+
+    const fn = _core.types.functionExpression(null, params, _core.types.blockStatement(isSwitch ? [block] : block.body));
+
+    this.addContinuations(fn);
+    let call = _core.types.callExpression(_core.types.nullLiteral(), args);
+    let basePath = ".callee";
+
+    const hasYield = _core.traverse.hasType(fn.body, "YieldExpression", _core.types.FUNCTION_TYPES);
+    if (hasYield) {
+      fn.generator = true;
+      call = _core.types.yieldExpression(call, true);
+      basePath = ".argument" + basePath;
+    }
+
+    const hasAsync = _core.traverse.hasType(fn.body, "AwaitExpression", _core.types.FUNCTION_TYPES);
+    if (hasAsync) {
+      fn.async = true;
+      call = _core.types.awaitExpression(call);
+      basePath = ".argument" + basePath;
+    }
+    let placeholderPath;
+    let index;
+    if (this.has.hasReturn || this.has.hasBreakContinue) {
+      const ret = this.scope.generateUid("ret");
+      this.body.push(_core.types.variableDeclaration("var", [_core.types.variableDeclarator(_core.types.identifier(ret), call)]));
+      placeholderPath = "declarations.0.init" + basePath;
+      index = this.body.length - 1;
+      this.buildHas(ret);
+    } else {
+      this.body.push(_core.types.expressionStatement(call));
+      placeholderPath = "expression" + basePath;
+      index = this.body.length - 1;
+    }
+    let callPath;
+    if (isSwitch) {
+      const {
+        parentPath,
+        listKey,
+        key
+      } = this.blockPath;
+      this.blockPath.replaceWithMultiple(this.body);
+      callPath = parentPath.get(listKey)[key + index];
+    } else {
+      block.body = this.body;
+      callPath = this.blockPath.get("body")[index];
+    }
+    const placeholder = callPath.get(placeholderPath);
+    let fnPath;
+    if (this.loop) {
+      const loopId = this.scope.generateUid("loop");
+      const p = this.loopPath.insertBefore(_core.types.variableDeclaration("var", [_core.types.variableDeclarator(_core.types.identifier(loopId), fn)]));
+      placeholder.replaceWith(_core.types.identifier(loopId));
+      fnPath = p[0].get("declarations.0.init");
+    } else {
+      placeholder.replaceWith(fn);
+      fnPath = placeholder;
+    }
+
+    fnPath.unwrapFunctionEnvironment();
+  }
+
+  addContinuations(fn) {
+    const state = {
+      reassignments: {},
+      returnStatements: [],
+      outsideReferences: this.outsideLetReferences
+    };
+    this.scope.traverse(fn, continuationVisitor, state);
+    for (let i = 0; i < fn.params.length; i++) {
+      const param = fn.params[i];
+      if (!state.reassignments[param.name]) continue;
+      const paramName = param.name;
+      const newParamName = this.scope.generateUid(param.name);
+      fn.params[i] = _core.types.identifier(newParamName);
+      this.scope.rename(paramName, newParamName, fn);
+      state.returnStatements.forEach(returnStatement => {
+        returnStatement.insertBefore(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.identifier(paramName), _core.types.identifier(newParamName))));
+      });
+
+      fn.body.body.push(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.identifier(paramName), _core.types.identifier(newParamName))));
+    }
+  }
+  getLetReferences() {
+    const block = this.block;
+    const declarators = [];
+    if (this.loop) {
+      const init = this.loop.left || this.loop.init;
+      if (isBlockScoped(init)) {
+        declarators.push(init);
+        const names = _core.types.getBindingIdentifiers(init);
+        for (const name of Object.keys(names)) {
+          this.outsideLetReferences.set(name, names[name]);
+        }
+      }
+    }
+    const addDeclarationsFromChild = (path, node) => {
+      if (_core.types.isClassDeclaration(node) || _core.types.isFunctionDeclaration(node) || isBlockScoped(node)) {
+        if (isBlockScoped(node)) {
+          convertBlockScopedToVar(path, node, block, this.scope);
+        }
+        if (node.type === "VariableDeclaration") {
+          for (let i = 0; i < node.declarations.length; i++) {
+            declarators.push(node.declarations[i]);
+          }
+        } else {
+          declarators.push(node);
+        }
+      }
+      if (_core.types.isLabeledStatement(node)) {
+        addDeclarationsFromChild(path.get("body"), node.body);
+      }
+    };
+    if (block.type === "SwitchStatement") {
+      const declarPaths = this.blockPath.get("cases");
+      for (let i = 0; i < block.cases.length; i++) {
+        const consequents = block.cases[i].consequent;
+        for (let j = 0; j < consequents.length; j++) {
+          const declar = consequents[j];
+          addDeclarationsFromChild(declarPaths[i], declar);
+        }
+      }
+    } else {
+      const declarPaths = this.blockPath.get("body");
+      for (let i = 0; i < block.body.length; i++) {
+        addDeclarationsFromChild(declarPaths[i], declarPaths[i].node);
+      }
+    }
+
+    for (let i = 0; i < declarators.length; i++) {
+      const declar = declarators[i];
+      const keys = _core.types.getBindingIdentifiers(declar, false, true);
+      for (const key of Object.keys(keys)) {
+        this.letReferences.set(key, keys[key]);
+      }
+      this.hasLetReferences = true;
+    }
+
+    if (!this.hasLetReferences) return;
+    const state = {
+      letReferences: this.letReferences,
+      closurify: false,
+      loopDepth: 0,
+      tdzEnabled: this.tdzEnabled,
+      addHelper: name => this.state.addHelper(name)
+    };
+    if (isInLoop(this.blockPath)) {
+      state.loopDepth++;
+    }
+
+    this.blockPath.traverse(letReferenceBlockVisitor, state);
+    return state.closurify;
+  }
+
+  checkLoop() {
+    const state = {
+      hasBreakContinue: false,
+      ignoreLabeless: false,
+      inSwitchCase: false,
+      innerLabels: [],
+      hasReturn: false,
+      isLoop: !!this.loop,
+      map: new Map(),
+      loopIgnored: new WeakSet()
+    };
+    this.blockPath.traverse(loopLabelVisitor, state);
+    this.blockPath.traverse(loopVisitor, state);
+    return state;
+  }
+
+  hoistVarDeclarations() {
+    this.blockPath.traverse(hoistVarDeclarationsVisitor, this);
+  }
+
+  pushDeclar(node) {
+    const declars = [];
+    const names = _core.types.getBindingIdentifiers(node);
+    for (const name of Object.keys(names)) {
+      declars.push(_core.types.variableDeclarator(names[name]));
+    }
+    this.body.push(_core.types.variableDeclaration(node.kind, declars));
+    const replace = [];
+    for (let i = 0; i < node.declarations.length; i++) {
+      const declar = node.declarations[i];
+      if (!declar.init) continue;
+      const expr = _core.types.assignmentExpression("=", _core.types.cloneNode(declar.id), _core.types.cloneNode(declar.init));
+      replace.push(_core.types.inherits(expr, declar));
+    }
+    return replace;
+  }
+  buildHas(ret) {
+    const body = this.body;
+    const has = this.has;
+    if (has.hasBreakContinue) {
+      for (const key of has.map.keys()) {
+        body.push(_core.types.ifStatement(_core.types.binaryExpression("===", _core.types.identifier(ret), _core.types.stringLiteral(key)), has.map.get(key)));
+      }
+    }
+
+    if (has.hasReturn) {
+      body.push(buildRetCheck({
+        RETURN: _core.types.identifier(ret)
+      }));
+    }
+  }
+}
+
+//# sourceMappingURL=index.js.map

front/app/node_modules/@babel/plugin-transform-block-scoping/lib/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["DONE","WeakSet","declare","api","opts","assertVersion","throwIfClosureRequired","tdz","tdzEnabled","Error","name","visitor","VariableDeclaration","path","node","parent","scope","isBlockScoped","convertBlockScopedToVar","_tdzThis","nodes","i","declarations","length","decl","assign","t","assignmentExpression","cloneNode","id","init","buildUndefinedNode","skipTDZChecks","add","push","expressionStatement","addHelper","_blockHoist","isCompletionRecord","replaceWithMultiple","Loop","state","ensureBlock","blockScoping","BlockScoping","get","replace","run","replaceWith","CatchClause","ignoreBlock","isLoop","isCatchClause","buildRetCheck","template","statement","isVariableDeclaration","BLOCK_SCOPED_SYMBOL","kind","isInLoop","loopOrFunctionParent","find","isFunction","moveBindingsToParent","isFor","declar","parentScope","getFunctionParent","getProgramParent","Object","keys","getBindingIdentifiers","binding","getOwnBinding","moveBindingTo","isVar","letReferenceFunctionVisitor","traverse","visitors","merge","ReferencedIdentifier","ref","letReferences","localBinding","getBindingIdentifier","closurify","tdzVisitor","letReferenceBlockVisitor","enter","loopDepth","exit","FunctionParent","skip","hoistVarDeclarationsVisitor","self","isForStatement","pushDeclar","sequenceExpression","isForInStatement","isForOfStatement","left","map","expr","loopLabelVisitor","LabeledStatement","innerLabels","label","continuationVisitor","isAssignmentExpression","isUpdateExpression","outsideReferences","reassignments","isReturnStatement","returnStatements","loopNodeTo","isBreakStatement","isContinueStatement","loopVisitor","oldIgnoreLabeless","ignoreLabeless","Function","SwitchCase","oldInSwitchCase","inSwitchCase","loopIgnored","has","loopText","indexOf","hasBreakContinue","set","stringLiteral","hasReturn","objectExpression","objectProperty","identifier","argument","returnStatement","inherits","isStrict","isProgram","sourceType","isBlockStatement","directives","some","directive","value","constructor","loopPath","blockPath","block","outsideLetReferences","hasLetReferences","body","loopParent","loopLabel","loop","Map","isLabeledStatement","needsClosure","getLetReferences","checkConstants","updateScopeInfo","wrapClosure","remap","labeledStatement","constBindings","Set","bindings","violation","constantViolations","readOnlyError","throwNode","callExpression","operator","includes","logicalExpression","slice","binaryExpression","unaryExpression","isForXStatement","variableDeclaration","variableDeclarator","generateUidIdentifier","unshift","wrappedInClosure","blockScope","letRefs","key","getBinding","hasOwnBinding","removeBinding","outsideLetRefs","blockPathScope","parentHasBinding","hasGlobal","parentBinding","async","generator","parentPath","rename","buildCodeFrameError","outsideRefs","Array","from","delete","checkLoop","hoistVarDeclarations","args","values","params","isSwitch","type","fn","functionExpression","blockStatement","addContinuations","call","nullLiteral","basePath","hasYield","hasType","FUNCTION_TYPES","yieldExpression","hasAsync","awaitExpression","placeholderPath","index","ret","generateUid","buildHas","callPath","listKey","placeholder","fnPath","loopId","p","insertBefore","unwrapFunctionEnvironment","param","paramName","newParamName","forEach","declarators","names","addDeclarationsFromChild","isClassDeclaration","isFunctionDeclaration","declarPaths","cases","consequents","consequent","j","declars","ifStatement","RETURN"],"sources":["../src/index.ts"],"sourcesContent":["import { declare } from \"@babel/helper-plugin-utils\";\nimport type { NodePath, Visitor, Scope, Binding } from \"@babel/traverse\";\nimport { skipTDZChecks, visitor as tdzVisitor } from \"./tdz\";\nimport type { TDZVisitorState } from \"./tdz\";\nimport { traverse, template, types as t } from \"@babel/core\";\nimport type { PluginPass } from \"@babel/core\";\n\nconst DONE = new WeakSet();\n\nexport interface Options {\n  tdz?: boolean;\n  throwIfClosureRequired?: boolean;\n}\n\nexport default declare((api, opts: Options) => {\n  api.assertVersion(7);\n\n  const { throwIfClosureRequired = false, tdz: tdzEnabled = false } = opts;\n  if (typeof throwIfClosureRequired !== \"boolean\") {\n    throw new Error(`.throwIfClosureRequired must be a boolean, or undefined`);\n  }\n  if (typeof tdzEnabled !== \"boolean\") {\n    throw new Error(`.tdz must be a boolean, or undefined`);\n  }\n\n  return {\n    name: \"transform-block-scoping\",\n\n    visitor: {\n      VariableDeclaration(path) {\n        const { node, parent, scope } = path;\n        if (!isBlockScoped(node)) return;\n        convertBlockScopedToVar(path, null, parent, scope, true);\n\n        // @ts-expect-error todo(flow->ts): avoid mutations\n        if (node._tdzThis) {\n          const nodes: t.Node[] = [node];\n\n          for (let i = 0; i < node.declarations.length; i++) {\n            const decl = node.declarations[i];\n            const assign = t.assignmentExpression(\n            Line truncated

front/app/node_modules/@babel/plugin-transform-block-scoping/lib/tdz.js

@@ -0,0 +1,101 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.visitor = exports.skipTDZChecks = void 0;
+var _core = require("@babel/core");
+function getTDZStatus(refPath, bindingPath) {
+  const executionStatus = bindingPath._guessExecutionStatusRelativeTo(refPath);
+  if (executionStatus === "before") {
+    return "outside";
+  } else if (executionStatus === "after") {
+    return "inside";
+  } else {
+    return "maybe";
+  }
+}
+const skipTDZChecks = new WeakSet();
+exports.skipTDZChecks = skipTDZChecks;
+function buildTDZAssert(status, node, state) {
+  if (status === "maybe") {
+    const clone = _core.types.cloneNode(node);
+    skipTDZChecks.add(clone);
+    return _core.types.callExpression(state.addHelper("temporalRef"), [
+    clone, _core.types.stringLiteral(node.name)]);
+  } else {
+    return _core.types.callExpression(state.addHelper("tdz"), [_core.types.stringLiteral(node.name)]);
+  }
+}
+function isReference(node, scope, state) {
+  const declared = state.letReferences.get(node.name);
+  if (!declared) return false;
+
+  return scope.getBindingIdentifier(node.name) === declared;
+}
+function getTDZReplacement(path, state, id = path.node) {
+  if (!isReference(id, path.scope, state)) return;
+  if (skipTDZChecks.has(id)) return;
+  skipTDZChecks.add(id);
+  const bindingPath = path.scope.getBinding(id.name).path;
+  if (bindingPath.isFunctionDeclaration()) return;
+  const status = getTDZStatus(path, bindingPath);
+  if (status === "outside") return;
+  if (status === "maybe") {
+    bindingPath.parent._tdzThis = true;
+  }
+  return {
+    status,
+    node: buildTDZAssert(status, id, state)
+  };
+}
+const visitor = {
+  ReferencedIdentifier(path, state) {
+    if (!state.tdzEnabled) return;
+    if (path.parentPath.isUpdateExpression()) return;
+    if (path.parentPath.isFor({
+      left: path.node
+    })) return;
+    const replacement = getTDZReplacement(path, state);
+    if (!replacement) return;
+    path.replaceWith(replacement.node);
+  },
+  UpdateExpression(path, state) {
+    if (!state.tdzEnabled) return;
+    const {
+      node
+    } = path;
+    if (skipTDZChecks.has(node)) return;
+    skipTDZChecks.add(node);
+    const arg = path.get("argument");
+    if (!arg.isIdentifier()) return;
+    const replacement = getTDZReplacement(path, state, arg.node);
+    if (!replacement) return;
+    if (replacement.status === "maybe") {
+      path.insertBefore(replacement.node);
+    } else {
+      path.replaceWith(replacement.node);
+    }
+  },
+  AssignmentExpression(path, state) {
+    if (!state.tdzEnabled) return;
+    const {
+      node
+    } = path;
+    if (skipTDZChecks.has(node)) return;
+    skipTDZChecks.add(node);
+    const nodes = [];
+    const ids = path.getBindingIdentifiers();
+    for (const name of Object.keys(ids)) {
+      const replacement = getTDZReplacement(path, state, ids[name]);
+      if (replacement) {
+        nodes.push(_core.types.expressionStatement(replacement.node));
+        if (replacement.status === "inside") break;
+      }
+    }
+    if (nodes.length > 0) path.insertBefore(nodes);
+  }
+};
+exports.visitor = visitor;
+
+//# sourceMappingURL=tdz.js.map

front/app/node_modules/@babel/plugin-transform-block-scoping/lib/tdz.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["getTDZStatus","refPath","bindingPath","executionStatus","_guessExecutionStatusRelativeTo","skipTDZChecks","WeakSet","buildTDZAssert","status","node","state","clone","t","cloneNode","add","callExpression","addHelper","stringLiteral","name","isReference","scope","declared","letReferences","get","getBindingIdentifier","getTDZReplacement","path","id","has","getBinding","isFunctionDeclaration","parent","_tdzThis","visitor","ReferencedIdentifier","tdzEnabled","parentPath","isUpdateExpression","isFor","left","replacement","replaceWith","UpdateExpression","arg","isIdentifier","insertBefore","AssignmentExpression","nodes","ids","getBindingIdentifiers","Object","keys","push","expressionStatement","length"],"sources":["../src/tdz.ts"],"sourcesContent":["import { types as t, type PluginPass } from \"@babel/core\";\nimport type { NodePath, Scope, Visitor } from \"@babel/traverse\";\n\nfunction getTDZStatus(refPath: NodePath, bindingPath: NodePath) {\n  const executionStatus = bindingPath._guessExecutionStatusRelativeTo(refPath);\n\n  if (executionStatus === \"before\") {\n    return \"outside\";\n  } else if (executionStatus === \"after\") {\n    return \"inside\";\n  } else {\n    return \"maybe\";\n  }\n}\n\nexport const skipTDZChecks = new WeakSet();\n\nfunction buildTDZAssert(\n  status: \"maybe\" | \"inside\",\n  node: t.Identifier | t.JSXIdentifier,\n  state: TDZVisitorState,\n) {\n  if (status === \"maybe\") {\n    const clone = t.cloneNode(node);\n    skipTDZChecks.add(clone);\n    return t.callExpression(state.addHelper(\"temporalRef\"), [\n      // @ts-expect-error Fixme: we may need to handle JSXIdentifier\n      clone,\n      t.stringLiteral(node.name),\n    ]);\n  } else {\n    return t.callExpression(state.addHelper(\"tdz\"), [\n      t.stringLiteral(node.name),\n    ]);\n  }\n}\n\nfunction isReference(\n  node: t.Identifier | t.JSXIdentifier,\n  scope: Scope,\n  state: TDZVisitorState,\n) {\n  const declared = state.letReferences.get(node.name);\n  if (!declared) return false;\n\n  // declared node is different in this scope\n  return scope.getBindingIdentifier(node.name) === declared;\n}\n\ntype TDZReplacement = { status: \"maybe\" | \"inside\"; node: t.Expression };\nfunction getTDZReplacement(\n  path: NodePath<t.Identifier | t.JSXIdentifier>,\n  state: TDZVisitorState,\n): TDZReplacement | undefined;\nfunction getTDZReplacement(\n  path: NodePath,\n  state: TDZVisitorState,\n  id: t.Identifier | t.JSXIdentifier,\n): TDZReplacement | undefined;\nfunction getTDZReplacement(\n  path: NodePath,\n  state: TDZVisitorState,\n  id: t.Identifier | t.JSXIdentifier = path.node as any,\n): TDZReplacement | undefined {\n  if (!isReference(id, path.scope, state)) return;\n\n  if (skipTDZChecks.has(id)) return;\n  skipTDZChecks.add(id);\n\n  const bindingPath = path.scope.getBinding(id.name).path;\n\n  if (bindingPath.isFunctionDeclaration()) return;\n\n  const status = getTDZStatus(path, bindingPath);\n  if (status === \"outside\") return;\n\n  if (status === \"maybe\") {\n    // add tdzThis to parent variable declarator so it's exploded\n    // @ts-expect-error todo(flow->ts): avoid mutations\n    bindingPath.parent._tdzThis = true;\n  }\n\n  return { status, node: buildTDZAssert(status, id, state) };\n}\n\nexport interface TDZVisitorState {\n  tdzEnabled: boolean;\n  addHelper: PluginPass[\"addHelper\"];\n  letReferences: Map<string, t.Identifier>;\n}\n\nexport const visitor: Visitor<TDZVisitorState> = {\n  ReferencedIdentifier(path, state) {\n    if (!state.tdzEnabled) return;\n    if (path.parentPath.isUpdateExpression()) return;\n    // It will be handled after transforming the loop\n    if (path.parentPath.isFor({ left: path.node })) return;\n\n    const replacement = getTDZReplacement(path, state);\n    if (!replacement) return;\n\n    path.replaceWith(replacement.node);\n  },\n\n  UpdateExpression(path, state) {\n    if (!state.tdzEnabled) return;\n\n    const { node } = path;\n    if (skipTDZChecks.has(node)) return;\n    skipTDZChecks.add(node);\n\n    const arg = path.get(\"argument\");\n    if (!arg.isIdentifier()) return;\n\n    const replacement = getTDZReplacement(path, state, arg.node);\n    if (!replacement) return;\n\n    if (replacement.status === \"maybe\") {\n      path.insertBefore(replacement.node);\n    } else {\n      path.replaceWith(replacement.node);\n    }\n  },\n\n  AssignmentExpression(path, state) {\n    if (!state.tdzEnabled) return;\n\n    const { node } = path;\n    if (skipTDZChecks.has(node)) return;\n    skipTDZChecks.add(node);\n\n    const nodes = [];\n    const ids = path.getBindingIdentifiers();\n\n    for (const name of Object.keys(ids)) {\n      const replacement = getTDZReplacement(path, state, ids[name]);\n      if (replacement) {\n        nodes.push(t.expressionStatement(replacement.node));\n        if (replacement.status === \"inside\") break;\n      }\n    }\n\n    if (nodes.length > 0) path.insertBefore(nodes);\n  },\n};\n"],"mappings":";;;;;Line truncated