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 "scriptFunction.h"
17
18#include <binder/binder.h>
19#include <binder/scope.h>
20#include <ir/astDump.h>
21#include <ir/base/methodDefinition.h>
22#include <ir/expression.h>
23#include <ir/expressions/identifier.h>
24#include <ir/statements/blockStatement.h>
25#include <ir/ts/tsTypeParameter.h>
26#include <ir/ts/tsTypeParameterDeclaration.h>
27
28namespace panda::es2panda::ir {
29
30size_t ScriptFunction::FormalParamsLength() const
31{
32    size_t length = 0;
33
34    for (const auto *param : params_) {
35        if (param->IsRestElement() || param->IsAssignmentPattern()) {
36            break;
37        }
38
39        length++;
40    }
41
42    return length;
43}
44
45util::StringView ScriptFunction::GetName() const
46{
47    if (id_) {
48        return id_->Name();
49    }
50
51    if (exportDefault_) {
52        return parser::SourceTextModuleRecord::DEFAULT_LOCAL_NAME;
53    }
54
55    return "";
56}
57
58void ScriptFunction::Iterate(const NodeTraverser &cb) const
59{
60    if (id_) {
61        cb(id_);
62    }
63
64    if (typeParams_) {
65        cb(typeParams_);
66    }
67
68    if (thisParam_) {
69        cb(thisParam_);
70    }
71
72    for (auto *it : params_) {
73        cb(it);
74    }
75
76    if (returnTypeAnnotation_) {
77        cb(returnTypeAnnotation_);
78    }
79
80    if (body_) {
81        cb(body_);
82    }
83}
84
85void ScriptFunction::Dump(ir::AstDumper *dumper) const
86{
87    dumper->Add({{"type", "ScriptFunction"},
88                 {"id", AstDumper::Nullable(id_)},
89                 {"generator", IsGenerator()},
90                 {"async", IsAsync()},
91                 {"expression", ((flags_ & ir::ScriptFunctionFlags::EXPRESSION) != 0)},
92                 {"thisParam", AstDumper::Optional(thisParam_)},
93                 {"params", params_},
94                 {"returnType", AstDumper::Optional(returnTypeAnnotation_)},
95                 {"typeParameters", AstDumper::Optional(typeParams_)},
96                 {"declare", AstDumper::Optional(declare_)},
97                 {"body", AstDumper::Optional(body_)}});
98}
99
100void ScriptFunction::Compile([[maybe_unused]] compiler::PandaGen *pg) const {}
101
102checker::Type *ScriptFunction::Check([[maybe_unused]] checker::Checker *checker) const
103{
104    return nullptr;
105}
106
107void ScriptFunction::UpdateSelf(const NodeUpdater &cb, binder::Binder *binder)
108{
109    if (id_) {
110        id_ = std::get<ir::AstNode *>(cb(id_))->AsIdentifier();
111    }
112
113    auto paramScopeCtx = binder::LexicalScope<binder::FunctionParamScope>::Enter(binder, scope_->ParamScope());
114
115    if (typeParams_) {
116        typeParams_ = std::get<ir::AstNode *>(cb(typeParams_))->AsTSTypeParameterDeclaration();
117    }
118
119    if (thisParam_) {
120        thisParam_ = std::get<ir::AstNode *>(cb(thisParam_))->AsExpression();
121    }
122
123    for (auto iter = params_.begin(); iter != params_.end(); iter++) {
124        *iter = std::get<ir::AstNode *>(cb(*iter))->AsExpression();
125    }
126
127    if (returnTypeAnnotation_) {
128        returnTypeAnnotation_ = std::get<ir::AstNode *>(cb(returnTypeAnnotation_))->AsExpression();
129    }
130
131    auto scopeCtx = binder::LexicalScope<binder::FunctionScope>::Enter(binder, scope_);
132
133    if (body_) {
134        body_ = std::get<ir::AstNode *>(cb(body_));
135    }
136}
137
138util::StringView ScriptFunction::SourceCode(binder::Binder *binder) const
139{
140    auto *funcNode = this->Parent();
141    if (funcNode->IsFunctionExpression() &&
142        funcNode->Parent()->IsMethodDefinition() &&
143        funcNode->Parent()->AsMethodDefinition()->Value() == funcNode->AsFunctionExpression()) {
144        funcNode = funcNode->Parent();
145    }
146
147    auto startIndex = funcNode->Start().index;
148    auto endIndex = funcNode->End().index;
149    return binder->Program()->SourceCode().Substr(startIndex, endIndex);
150}
151
152}  // namespace panda::es2panda::ir
153