148 lines
11 KiB
JavaScript
148 lines
11 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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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"); } }; }(); /**
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* Copyright (c) 2017-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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exports.default = function (ast, strictCode, env, realm) {
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var _env$partiallyEvaluat = env.partiallyEvaluateCompletionDeref(ast.test, strictCode),
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_env$partiallyEvaluat2 = _slicedToArray(_env$partiallyEvaluat, 3),
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exprValue = _env$partiallyEvaluat2[0],
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exprAst = _env$partiallyEvaluat2[1],
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exprIO = _env$partiallyEvaluat2[2];
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if (exprValue instanceof _completions.AbruptCompletion) return [exprValue, t.expressionStatement(exprAst), exprIO];
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var completion = void 0;
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if (exprValue instanceof _completions.PossiblyNormalCompletion) {
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completion = exprValue;
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exprValue = completion.value;
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}
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(0, _invariant2.default)(exprValue instanceof _index2.Value);
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if (!exprValue.mightNotBeTrue()) {
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// 3.a. Let stmtCompletion be the result of evaluating the first Statement
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var _env$partiallyEvaluat3 = env.partiallyEvaluateCompletionDeref(ast.consequent, strictCode),
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_env$partiallyEvaluat4 = _slicedToArray(_env$partiallyEvaluat3, 3),
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stmtCompletion = _env$partiallyEvaluat4[0],
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stmtAst = _env$partiallyEvaluat4[1],
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stmtIO = _env$partiallyEvaluat4[2];
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// 5. Return Completion(UpdateEmpty(stmtCompletion, undefined)
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stmtCompletion = (0, _index.UpdateEmpty)(realm, stmtCompletion, realm.intrinsics.undefined);
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return [stmtCompletion, stmtAst, exprIO.concat(stmtIO)];
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} else if (!exprValue.mightNotBeFalse()) {
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var _stmtCompletion = void 0,
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_stmtAst = void 0,
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_stmtIO = void 0;
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if (ast.alternate) {
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// 4.a. Let stmtCompletion be the result of evaluating the second Statement
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;
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var _env$partiallyEvaluat5 = env.partiallyEvaluateCompletionDeref(ast.alternate, strictCode);
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var _env$partiallyEvaluat6 = _slicedToArray(_env$partiallyEvaluat5, 3);
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_stmtCompletion = _env$partiallyEvaluat6[0];
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_stmtAst = _env$partiallyEvaluat6[1];
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_stmtIO = _env$partiallyEvaluat6[2];
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} else {
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// 3 (of the if only statement). Return NormalCompletion(undefined)
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_stmtCompletion = realm.intrinsics.undefined;
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_stmtAst = t.emptyStatement();
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_stmtIO = [];
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}
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// 5. Return Completion(UpdateEmpty(stmtCompletion, undefined)
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_stmtCompletion = (0, _index.UpdateEmpty)(realm, _stmtCompletion, realm.intrinsics.undefined);
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return [_stmtCompletion, _stmtAst, exprIO.concat(_stmtIO)];
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}
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(0, _invariant2.default)(exprValue instanceof _index2.AbstractValue);
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// Evaluate consequent and alternate in sandboxes and get their effects.
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var _realm$partiallyEvalu = realm.partiallyEvaluateNodeForEffects(ast.consequent, strictCode, env),
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_realm$partiallyEvalu2 = _slicedToArray(_realm$partiallyEvalu, 3),
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consequentEffects = _realm$partiallyEvalu2[0],
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conAst = _realm$partiallyEvalu2[1],
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conIO = _realm$partiallyEvalu2[2];
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var _consequentEffects = _slicedToArray(consequentEffects, 5),
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conCompl = _consequentEffects[0],
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gen1 = _consequentEffects[1],
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bindings1 = _consequentEffects[2],
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properties1 = _consequentEffects[3],
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createdObj1 = _consequentEffects[4];
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var consequentAst = conAst;
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if (conIO.length > 0) consequentAst = t.blockStatement(conIO.concat(consequentAst));
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var _ref = ast.alternate ? realm.partiallyEvaluateNodeForEffects(ast.alternate, strictCode, env) : [(0, _realm.construct_empty_effects)(realm), undefined, []],
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_ref2 = _slicedToArray(_ref, 3),
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alternateEffects = _ref2[0],
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altAst = _ref2[1],
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altIO = _ref2[2];
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var _alternateEffects = _slicedToArray(alternateEffects, 5),
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altCompl = _alternateEffects[0],
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gen2 = _alternateEffects[1],
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bindings2 = _alternateEffects[2],
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properties2 = _alternateEffects[3],
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createdObj2 = _alternateEffects[4];
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var alternateAst = altAst;
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if (altIO.length > 0) alternateAst = t.blockStatement(altIO.concat(alternateAst));
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// Join the effects, creating an abstract view of what happened, regardless
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// of the actual value of exprValue.
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var joinedEffects = _singletons.Join.joinEffects(realm, exprValue, [conCompl, gen1, bindings1, properties1, createdObj1], [altCompl, gen2, bindings2, properties2, createdObj2]);
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completion = joinedEffects[0];
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if (completion instanceof _completions.PossiblyNormalCompletion) {
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// in this case one of the branches may complete abruptly, which means that
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// not all control flow branches join into one flow at this point.
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// Consequently we have to continue tracking changes until the point where
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// all the branches come together into one.
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realm.captureEffects(completion);
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}
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// Note that the effects of (non joining) abrupt branches are not included
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// in joinedEffects, but are tracked separately inside completion.
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realm.applyEffects(joinedEffects);
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var resultAst = t.ifStatement(exprAst, consequentAst, alternateAst);
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(0, _invariant2.default)(!(completion instanceof _environment.Reference));
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return [completion, resultAst, exprIO];
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};
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var _completions = require("../completions.js");
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var _environment = require("../environment.js");
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var _index = require("../methods/index.js");
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var _index2 = require("../values/index.js");
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var _realm = require("../realm.js");
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var _singletons = require("../singletons.js");
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var _babelTypes = require("babel-types");
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var t = _interopRequireWildcard(_babelTypes);
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var _invariant = require("../invariant.js");
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var _invariant2 = _interopRequireDefault(_invariant);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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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; } }
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//# sourceMappingURL=IfStatement.js.map
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