1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "builtins_generator.h"
17 #include "ecmascript/js_function.h"
18 #include "ecmascript/js_generator_object.h"
19
20 namespace panda::ecmascript::builtins {
21 // 26.2.1.1 GeneratorFunction(p1, p2, … , pn, body)
GeneratorFunctionConstructor(EcmaRuntimeCallInfo * argv)22 JSTaggedValue BuiltinsGenerator::GeneratorFunctionConstructor(EcmaRuntimeCallInfo *argv)
23 {
24 BUILTINS_API_TRACE(argv->GetThread(), Generator, Constructor);
25 // not support
26 THROW_TYPE_ERROR_AND_RETURN(argv->GetThread(), "Not support eval. Forbidden using new GeneratorFunction().",
27 JSTaggedValue::Exception());
28 }
29
30 // 26.4.1.2 Generator.prototype.next(value)
GeneratorPrototypeNext(EcmaRuntimeCallInfo * argv)31 JSTaggedValue BuiltinsGenerator::GeneratorPrototypeNext(EcmaRuntimeCallInfo *argv)
32 {
33 BUILTINS_API_TRACE(argv->GetThread(), Generator, PrototypeNext);
34 // 1.Let g be the this value.
35 JSThread *thread = argv->GetThread();
36 [[maybe_unused]] EcmaHandleScope handleScope(thread);
37 JSHandle<JSTaggedValue> msg = GetThis(argv);
38 if (!msg->IsGeneratorObject()) {
39 THROW_TYPE_ERROR_AND_RETURN(thread, "Not a generator object.", JSTaggedValue::Exception());
40 }
41 JSHandle<JSGeneratorObject> generator(thread, JSGeneratorObject::Cast(*JSTaggedValue::ToObject(thread, msg)));
42 JSHandle<JSTaggedValue> value = GetCallArg(argv, 0);
43
44 // 2.Return ? GeneratorResume(g, value).
45 JSHandle<JSObject> result = JSGeneratorObject::GeneratorResume(thread, generator, value.GetTaggedValue());
46 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
47 return result.GetTaggedValue();
48 }
49
50 // 26.4.1.3 Generator.prototype.return(value)
GeneratorPrototypeReturn(EcmaRuntimeCallInfo * argv)51 JSTaggedValue BuiltinsGenerator::GeneratorPrototypeReturn(EcmaRuntimeCallInfo *argv)
52 {
53 BUILTINS_API_TRACE(argv->GetThread(), Generator, PrototypeReturn);
54 // 1.Let g be the this value.
55 JSThread *thread = argv->GetThread();
56 [[maybe_unused]] EcmaHandleScope handleScope(thread);
57 JSHandle<JSTaggedValue> msg = GetThis(argv);
58 if (!msg->IsGeneratorObject()) {
59 THROW_TYPE_ERROR_AND_RETURN(thread, "Not a generator object.", JSTaggedValue::Exception());
60 }
61 JSHandle<JSGeneratorObject> generator(thread, JSGeneratorObject::Cast(*JSTaggedValue::ToObject(thread, msg)));
62
63 // 2.Let C be Completion { [[Type]]: return, [[Value]]: value, [[Target]]: empty }.
64 JSHandle<JSTaggedValue> value = GetCallArg(argv, 0);
65 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
66 JSHandle<CompletionRecord> completionRecord =
67 factory->NewCompletionRecord(CompletionRecordType::RETURN, value);
68
69 // 3.Return ? GeneratorResumeAbrupt(g, C).
70 JSHandle<JSObject> result = JSGeneratorObject::GeneratorResumeAbrupt(thread, generator, completionRecord);
71 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
72 return result.GetTaggedValue();
73 }
74
75 // 26.4.1.4 Generator.prototype.throw(exception)
GeneratorPrototypeThrow(EcmaRuntimeCallInfo * argv)76 JSTaggedValue BuiltinsGenerator::GeneratorPrototypeThrow(EcmaRuntimeCallInfo *argv)
77 {
78 BUILTINS_API_TRACE(argv->GetThread(), Generator, PrototypeThrow);
79 // 1.Let g be the this value.
80 JSThread *thread = argv->GetThread();
81 [[maybe_unused]] EcmaHandleScope handleScope(thread);
82 JSHandle<JSTaggedValue> msg = GetThis(argv);
83 if (!msg->IsGeneratorObject()) {
84 THROW_TYPE_ERROR_AND_RETURN(thread, "Not a generator object.", JSTaggedValue::Exception());
85 }
86 JSHandle<JSGeneratorObject> generator(thread, JSGeneratorObject::Cast(*JSTaggedValue::ToObject(thread, msg)));
87
88 // 2.Let C be ThrowCompletion(exception).
89 JSHandle<JSTaggedValue> exception = GetCallArg(argv, 0);
90 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
91 JSHandle<CompletionRecord> completionRecord =
92 factory->NewCompletionRecord(CompletionRecordType::THROW, exception);
93
94 // 3.Return ? GeneratorResumeAbrupt(g, C).
95 JSHandle<JSObject> result = JSGeneratorObject::GeneratorResumeAbrupt(thread, generator, completionRecord);
96 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
97 return result.GetTaggedValue();
98 }
99 } // namespace panda::ecmascript::builtins
100