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
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 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
43 JSHandle<JSTaggedValue> value = GetCallArg(argv, 0);
44
45 // 2.Return ? GeneratorResume(g, value).
46 JSHandle<JSObject> result = JSGeneratorObject::GeneratorResume(thread, generator, value.GetTaggedValue());
47 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
48 return result.GetTaggedValue();
49 }
50
51 // 26.4.1.3 Generator.prototype.return(value)
GeneratorPrototypeReturn(EcmaRuntimeCallInfo *argv)52 JSTaggedValue BuiltinsGenerator::GeneratorPrototypeReturn(EcmaRuntimeCallInfo *argv)
53 {
54 BUILTINS_API_TRACE(argv->GetThread(), Generator, PrototypeReturn);
55 // 1.Let g be the this value.
56 JSThread *thread = argv->GetThread();
57 [[maybe_unused]] EcmaHandleScope handleScope(thread);
58 JSHandle<JSTaggedValue> msg = GetThis(argv);
59 if (!msg->IsGeneratorObject()) {
60 THROW_TYPE_ERROR_AND_RETURN(thread, "Not a generator object.", JSTaggedValue::Exception());
61 }
62 JSHandle<JSGeneratorObject> generator(thread, JSGeneratorObject::Cast(*JSTaggedValue::ToObject(thread, msg)));
63 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
64 // 2.Let C be Completion { [[Type]]: return, [[Value]]: value, [[Target]]: empty }.
65 JSHandle<JSTaggedValue> value = GetCallArg(argv, 0);
66 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
67 JSHandle<CompletionRecord> completionRecord =
68 factory->NewCompletionRecord(CompletionRecordType::RETURN, value);
69
70 // 3.Return ? GeneratorResumeAbrupt(g, C).
71 JSHandle<JSObject> result = JSGeneratorObject::GeneratorResumeAbrupt(thread, generator, completionRecord);
72 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
73 return result.GetTaggedValue();
74 }
75
76 // 26.4.1.4 Generator.prototype.throw(exception)
GeneratorPrototypeThrow(EcmaRuntimeCallInfo *argv)77 JSTaggedValue BuiltinsGenerator::GeneratorPrototypeThrow(EcmaRuntimeCallInfo *argv)
78 {
79 BUILTINS_API_TRACE(argv->GetThread(), Generator, PrototypeThrow);
80 // 1.Let g be the this value.
81 JSThread *thread = argv->GetThread();
82 [[maybe_unused]] EcmaHandleScope handleScope(thread);
83 JSHandle<JSTaggedValue> msg = GetThis(argv);
84 if (!msg->IsGeneratorObject()) {
85 THROW_TYPE_ERROR_AND_RETURN(thread, "Not a generator object.", JSTaggedValue::Exception());
86 }
87 JSHandle<JSGeneratorObject> generator(thread, JSGeneratorObject::Cast(*JSTaggedValue::ToObject(thread, msg)));
88 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
89 // 2.Let C be ThrowCompletion(exception).
90 JSHandle<JSTaggedValue> exception = GetCallArg(argv, 0);
91 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
92 JSHandle<CompletionRecord> completionRecord =
93 factory->NewCompletionRecord(CompletionRecordType::THROW, exception);
94
95 // 3.Return ? GeneratorResumeAbrupt(g, C).
96 JSHandle<JSObject> result = JSGeneratorObject::GeneratorResumeAbrupt(thread, generator, completionRecord);
97 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
98 return result.GetTaggedValue();
99 }
100 } // namespace panda::ecmascript::builtins
101