1 /**
2 * Copyright (c) 2021-2025 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 "switchCaseStatement.h"
17
18 #include "checker/TSchecker.h"
19 #include "compiler/core/ETSGen.h"
20 #include "compiler/core/pandagen.h"
21 #include "checker/ets/typeRelationContext.h"
22 #include "ir/astDump.h"
23 #include "ir/srcDump.h"
24
25 namespace ark::es2panda::ir {
TransformChildren(const NodeTransformer & cb,std::string_view transformationName)26 void SwitchCaseStatement::TransformChildren(const NodeTransformer &cb, std::string_view transformationName)
27 {
28 if (test_ != nullptr) {
29 if (auto *transformedNode = cb(test_); test_ != transformedNode) {
30 test_->SetTransformedNode(transformationName, transformedNode);
31 test_ = transformedNode->AsExpression();
32 }
33 }
34
35 for (auto *&it : VectorIterationGuard(consequent_)) {
36 if (auto *transformedNode = cb(it); it != transformedNode) {
37 it->SetTransformedNode(transformationName, transformedNode);
38 it = transformedNode->AsStatement();
39 }
40 }
41 }
42
Iterate(const NodeTraverser & cb) const43 void SwitchCaseStatement::Iterate(const NodeTraverser &cb) const
44 {
45 if (test_ != nullptr) {
46 cb(test_);
47 }
48
49 for (auto *it : VectorIterationGuard(consequent_)) {
50 cb(it);
51 }
52 }
53
Dump(ir::AstDumper * dumper) const54 void SwitchCaseStatement::Dump(ir::AstDumper *dumper) const
55 {
56 dumper->Add({{"type", "SwitchCase"}, {"test", AstDumper::Nullish(test_)}, {"consequent", consequent_}});
57 }
58
Dump(ir::SrcDumper * dumper) const59 void SwitchCaseStatement::Dump(ir::SrcDumper *dumper) const
60 {
61 if (test_ != nullptr) {
62 dumper->Add("case ");
63 test_->Dump(dumper);
64 dumper->Add(":");
65 } else {
66 dumper->Add("default:");
67 }
68 if (!consequent_.empty()) {
69 dumper->Add(" {");
70 dumper->IncrIndent();
71 dumper->Endl();
72 for (auto cs : consequent_) {
73 cs->Dump(dumper);
74 if (!cs->IsBlockStatement() && cs != consequent_.back()) {
75 dumper->Endl();
76 }
77 }
78 dumper->DecrIndent();
79 dumper->Endl();
80 dumper->Add("}");
81 }
82 }
83
Compile(compiler::PandaGen * pg) const84 void SwitchCaseStatement::Compile(compiler::PandaGen *pg) const
85 {
86 pg->GetAstCompiler()->Compile(this);
87 }
88
Compile(compiler::ETSGen * etsg) const89 void SwitchCaseStatement::Compile(compiler::ETSGen *etsg) const
90 {
91 etsg->GetAstCompiler()->Compile(this);
92 }
93
Check(checker::TSChecker * checker)94 checker::Type *SwitchCaseStatement::Check(checker::TSChecker *checker)
95 {
96 return checker->GetAnalyzer()->Check(this);
97 }
98
Check(checker::ETSChecker * checker)99 checker::VerifiedType SwitchCaseStatement::Check(checker::ETSChecker *checker)
100 {
101 return {this, checker->GetAnalyzer()->Check(this)};
102 }
103
104 // Auxilary function extracted from the 'Check' method for 'SwitchStatement' to reduce function's size.
CheckAndTestCase(checker::ETSChecker * checker,checker::Type * comparedExprType,checker::Type * unboxedDiscType,ir::Expression * node,bool & isDefaultCase)105 void SwitchCaseStatement::CheckAndTestCase(checker::ETSChecker *checker, checker::Type *comparedExprType,
106 checker::Type *unboxedDiscType, ir::Expression *node, bool &isDefaultCase)
107 {
108 if (test_ != nullptr) {
109 auto caseType = test_->Check(checker);
110 bool validCaseType = true;
111
112 if (caseType->HasTypeFlag(checker::TypeFlag::CHAR)) {
113 validCaseType = comparedExprType->HasTypeFlag(checker::TypeFlag::ETS_INTEGRAL);
114 } else if (caseType->IsETSEnumType() || comparedExprType->IsETSEnumType()) {
115 validCaseType = checker->Relation()->IsIdenticalTo(caseType, comparedExprType);
116 } else {
117 const checker::AssignmentContext ctx {
118 checker->Relation(),
119 node,
120 caseType,
121 unboxedDiscType,
122 test_->Start(),
123 std::nullopt,
124 (comparedExprType->IsETSObjectType() ? checker::TypeRelationFlag::NO_WIDENING
125 : checker::TypeRelationFlag::NO_UNBOXING) |
126 checker::TypeRelationFlag::NO_BOXING | checker::TypeRelationFlag::NO_THROW};
127 if (!ctx.IsAssignable()) {
128 checker->LogError(diagnostic::SWITCH_CASE_TYPE_INCOMPARABLE, {caseType, comparedExprType},
129 test_->Start());
130 return;
131 }
132 }
133
134 if (!validCaseType) {
135 checker->LogError(diagnostic::SWITCH_CASE_TYPE_INCOMPARABLE, {caseType, comparedExprType}, test_->Start());
136 return;
137 }
138 } else {
139 isDefaultCase = true;
140 }
141
142 for (auto *caseStmt : consequent_) {
143 caseStmt->Check(checker);
144 }
145 }
146
Clone(ArenaAllocator * const allocator,AstNode * const parent)147 SwitchCaseStatement *SwitchCaseStatement::Clone(ArenaAllocator *const allocator, AstNode *const parent)
148 {
149 auto *const test = test_->Clone(allocator, nullptr)->AsExpression();
150 ArenaVector<Statement *> consequent(allocator->Adapter());
151
152 for (auto *statement : consequent_) {
153 consequent.push_back(statement->Clone(allocator, nullptr)->AsStatement());
154 }
155
156 auto clone = util::NodeAllocator::ForceSetParent<ir::SwitchCaseStatement>(allocator, test, std::move(consequent));
157
158 clone->SetParent(parent);
159 clone->SetRange(Range());
160 return clone;
161 }
162
163 } // namespace ark::es2panda::ir
164