diff options
Diffstat (limited to 'node_modules/@babel/plugin-transform-block-scoping/lib/index.js')
| -rw-r--r-- | node_modules/@babel/plugin-transform-block-scoping/lib/index.js | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/node_modules/@babel/plugin-transform-block-scoping/lib/index.js b/node_modules/@babel/plugin-transform-block-scoping/lib/index.js deleted file mode 100644 index 32956389..00000000 --- a/node_modules/@babel/plugin-transform-block-scoping/lib/index.js +++ /dev/null @@ -1,184 +0,0 @@ -"use strict"; - -Object.defineProperty(exports, "__esModule", { - value: true -}); -exports.default = void 0; -var _helperPluginUtils = require("@babel/helper-plugin-utils"); -var _core = require("@babel/core"); -var _loop = require("./loop.js"); -var _validation = require("./validation.js"); -var _annexB_3_ = require("./annex-B_3_3.js"); -var _default = exports.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: _core.traverse.visitors.merge([_annexB_3_.annexB33FunctionsVisitor, { - Loop(path, state) { - const isForStatement = path.isForStatement(); - const headPath = isForStatement ? path.get("init") : path.isForXStatement() ? path.get("left") : null; - let needsBodyWrap = false; - const markNeedsBodyWrap = () => { - if (throwIfClosureRequired) { - throw path.buildCodeFrameError("Compiling let/const in this block would add a closure " + "(throwIfClosureRequired)."); - } - needsBodyWrap = true; - }; - const body = path.get("body"); - let bodyScope; - if (body.isBlockStatement()) { - bodyScope = body.scope; - } - const bindings = (0, _loop.getLoopBodyBindings)(path); - for (const binding of bindings) { - const { - capturedInClosure - } = (0, _loop.getUsageInBody)(binding, path); - if (capturedInClosure) markNeedsBodyWrap(); - } - const captured = []; - const updatedBindingsUsages = new Map(); - if (headPath && isBlockScoped(headPath.node)) { - const names = Object.keys(headPath.getBindingIdentifiers()); - const headScope = headPath.scope; - for (let name of names) { - var _bodyScope; - if ((_bodyScope = bodyScope) != null && _bodyScope.hasOwnBinding(name)) continue; - let binding = headScope.getOwnBinding(name); - if (!binding) { - headScope.crawl(); - binding = headScope.getOwnBinding(name); - } - const { - usages, - capturedInClosure, - hasConstantViolations - } = (0, _loop.getUsageInBody)(binding, path); - if (headScope.parent.hasBinding(name) || headScope.parent.hasGlobal(name)) { - const newName = headScope.generateUid(name); - headScope.rename(name, newName); - name = newName; - } - if (capturedInClosure) { - markNeedsBodyWrap(); - captured.push(name); - } - if (isForStatement && hasConstantViolations) { - updatedBindingsUsages.set(name, usages); - } - } - } - if (needsBodyWrap) { - const varPath = (0, _loop.wrapLoopBody)(path, captured, updatedBindingsUsages); - if (headPath != null && headPath.isVariableDeclaration()) { - transformBlockScopedVariable(headPath, state, tdzEnabled); - } - varPath.get("declarations.0.init").unwrapFunctionEnvironment(); - } - }, - VariableDeclaration(path, state) { - transformBlockScopedVariable(path, state, tdzEnabled); - }, - ClassDeclaration(path) { - const { - id - } = path.node; - if (!id) return; - const { - scope - } = path.parentPath; - if (!(0, _annexB_3_.isVarScope)(scope) && scope.parent.hasBinding(id.name, { - noUids: true - })) { - path.scope.rename(id.name); - } - } - }]) - }; -}); -const conflictingFunctionsVisitor = { - Scope(path, { - names - }) { - for (const name of names) { - const binding = path.scope.getOwnBinding(name); - if (binding && binding.kind === "hoisted") { - path.scope.rename(name); - } - } - }, - "Expression|Declaration"(path) { - path.skip(); - } -}; -function transformBlockScopedVariable(path, state, tdzEnabled) { - if (!isBlockScoped(path.node)) return; - const dynamicTDZNames = (0, _validation.validateUsage)(path, state, tdzEnabled); - path.node.kind = "var"; - const bindingNames = Object.keys(path.getBindingIdentifiers()); - for (const name of bindingNames) { - const binding = path.scope.getOwnBinding(name); - if (!binding) continue; - binding.kind = "var"; - } - if (isInLoop(path) && !(0, _loop.isVarInLoopHead)(path) || dynamicTDZNames.length > 0) { - for (const decl of path.node.declarations) { - var _decl$init; - (_decl$init = decl.init) != null ? _decl$init : decl.init = path.scope.buildUndefinedNode(); - } - } - const blockScope = path.scope; - const varScope = blockScope.getFunctionParent() || blockScope.getProgramParent(); - if (varScope !== blockScope) { - for (const name of bindingNames) { - let newName = name; - if (blockScope.parent.hasBinding(name, { - noUids: true - }) || blockScope.parent.hasGlobal(name)) { - newName = blockScope.generateUid(name); - blockScope.rename(name, newName); - } - blockScope.moveBindingTo(newName, varScope); - } - } - blockScope.path.traverse(conflictingFunctionsVisitor, { - names: bindingNames - }); - for (const name of dynamicTDZNames) { - path.scope.push({ - id: _core.types.identifier(name), - init: state.addHelper("temporalUndefined") - }); - } -} -function isLetOrConst(kind) { - return kind === "let" || kind === "const"; -} -function isInLoop(path) { - if (!path.parentPath) return false; - if (path.parentPath.isLoop()) return true; - if (path.parentPath.isFunctionParent()) return false; - return isInLoop(path.parentPath); -} -function isBlockScoped(node) { - if (!_core.types.isVariableDeclaration(node)) return false; - if (node[_core.types.BLOCK_SCOPED_SYMBOL]) { - return true; - } - if (!isLetOrConst(node.kind) && node.kind !== "using") { - return false; - } - return true; -} - -//# sourceMappingURL=index.js.map |