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build/node_modules/prepack/lib/partial-evaluators/BlockStatement.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }(); /**
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * Copyright (c) 2017-present, Facebook, Inc.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * All rights reserved.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          *
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * This source code is licensed under the BSD-style license found in the
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * LICENSE file in the root directory of this source tree. An additional grant
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * of patent rights can be found in the PATENTS file in the same directory.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          */
+
+// ECMA262 13.2.13
+
+
+exports.default = function (ast, strictCode, env, realm) {
+  // 1. Let oldEnv be the running execution context's LexicalEnvironment.
+  var oldEnv = realm.getRunningContext().lexicalEnvironment;
+
+  // 2. Let blockEnv be NewDeclarativeEnvironment(oldEnv).
+  var blockEnv = _singletons.Environment.NewDeclarativeEnvironment(realm, oldEnv);
+
+  // 3. Perform BlockDeclarationInstantiation(StatementList, blockEnv).
+  _singletons.Environment.BlockDeclarationInstantiation(realm, strictCode, ast.body, blockEnv);
+
+  // 4. Set the running execution context's LexicalEnvironment to blockEnv.
+  realm.getRunningContext().lexicalEnvironment = blockEnv;
+
+  try {
+    // 5. Let blockValue be the result of evaluating StatementList.
+    var blockValue = void 0;
+
+    if (ast.directives) {
+      var _iteratorNormalCompletion = true;
+      var _didIteratorError = false;
+      var _iteratorError = undefined;
+
+      try {
+        for (var _iterator = ast.directives[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+          var directive = _step.value;
+
+          blockValue = new _index.StringValue(realm, directive.value.value);
+        }
+      } catch (err) {
+        _didIteratorError = true;
+        _iteratorError = err;
+      } finally {
+        try {
+          if (!_iteratorNormalCompletion && _iterator.return) {
+            _iterator.return();
+          }
+        } finally {
+          if (_didIteratorError) {
+            throw _iteratorError;
+          }
+        }
+      }
+    }
+
+    var _Functions$PartiallyE = _singletons.Functions.PartiallyEvaluateStatements(ast.body, blockValue, strictCode, blockEnv, realm),
+        _Functions$PartiallyE2 = _slicedToArray(_Functions$PartiallyE, 2),
+        res = _Functions$PartiallyE2[0],
+        bAst = _Functions$PartiallyE2[1];
+
+    (0, _invariant2.default)(bAst.length > 0 || res instanceof _index.EmptyValue);
+    if (bAst.length === 0) return [res, t.emptyStatement(), []];
+    var rAst = t.blockStatement(bAst, ast.directives);
+    return [res, rAst, []];
+  } finally {
+    // 6. Set the running execution context's LexicalEnvironment to oldEnv.
+    realm.getRunningContext().lexicalEnvironment = oldEnv;
+    realm.onDestroyScope(blockEnv);
+  }
+};
+
+var _completions = require("../completions.js");
+
+var _index = require("../values/index.js");
+
+var _singletons = require("../singletons.js");
+
+var _invariant = require("../invariant.js");
+
+var _invariant2 = _interopRequireDefault(_invariant);
+
+var _babelTypes = require("babel-types");
+
+var t = _interopRequireWildcard(_babelTypes);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+//# sourceMappingURL=BlockStatement.js.map