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 "memberExpression.h"
17
18 #include <compiler/core/pandagen.h>
19 #include <typescript/checker.h>
20 #include <ir/astDump.h>
21 #include <ir/expressions/identifier.h>
22 #include <ir/expressions/literals/numberLiteral.h>
23 #include <ir/expressions/literals/stringLiteral.h>
24
25 namespace panda::es2panda::ir {
26
Iterate(const NodeTraverser & cb) const27 void MemberExpression::Iterate(const NodeTraverser &cb) const
28 {
29 cb(object_);
30 cb(property_);
31 }
32
Dump(ir::AstDumper * dumper) const33 void MemberExpression::Dump(ir::AstDumper *dumper) const
34 {
35 dumper->Add({{"type", "MemberExpression"},
36 {"object", object_},
37 {"property", property_},
38 {"computed", computed_},
39 {"optional", optional_}});
40 }
41
CompileObject(compiler::PandaGen * pg,compiler::VReg dest) const42 void MemberExpression::CompileObject(compiler::PandaGen *pg, compiler::VReg dest) const
43 {
44 object_->Compile(pg);
45 pg->StoreAccumulator(this, dest);
46 pg->GetOptionalChain()->CheckNullish(optional_, dest);
47 }
48
CompileKey(compiler::PandaGen * pg) const49 compiler::Operand MemberExpression::CompileKey(compiler::PandaGen *pg) const
50 {
51 return pg->ToPropertyKey(property_, computed_);
52 }
53
Compile(compiler::PandaGen * pg) const54 void MemberExpression::Compile(compiler::PandaGen *pg) const
55 {
56 compiler::RegScope rs(pg);
57 compiler::VReg objReg = pg->AllocReg();
58 Compile(pg, objReg);
59 }
60
Compile(compiler::PandaGen * pg,compiler::VReg objReg) const61 void MemberExpression::Compile(compiler::PandaGen *pg, compiler::VReg objReg) const
62 {
63 CompileObject(pg, objReg);
64 compiler::Operand prop = CompileKey(pg);
65
66 if (object_->IsSuperExpression()) {
67 pg->LoadSuperProperty(this, objReg, prop);
68 } else {
69 pg->LoadObjProperty(this, objReg, prop);
70 }
71 }
72
Check(checker::Checker * checker) const73 checker::Type *MemberExpression::Check(checker::Checker *checker) const
74 {
75 checker::Type *baseType = checker->CheckNonNullType(object_->Check(checker), object_->Start());
76
77 if (computed_) {
78 checker::Type *indexType = property_->Check(checker);
79 checker::Type *indexedAccessType = checker->GetPropertyTypeForIndexType(baseType, indexType);
80
81 if (indexedAccessType) {
82 return indexedAccessType;
83 }
84
85 if (!indexType->HasTypeFlag(checker::TypeFlag::STRING_LIKE | checker::TypeFlag::NUMBER_LIKE)) {
86 checker->ThrowTypeError({"Type ", indexType, " cannot be used as index type"}, property_->Start());
87 }
88
89 if (indexType->IsNumberType()) {
90 checker->ThrowTypeError("No index signature with a parameter of type 'string' was found on type this type",
91 Start());
92 }
93
94 if (indexType->IsStringType()) {
95 checker->ThrowTypeError("No index signature with a parameter of type 'number' was found on type this type",
96 Start());
97 }
98
99 switch (property_->Type()) {
100 case ir::AstNodeType::IDENTIFIER: {
101 checker->ThrowTypeError(
102 {"Property ", property_->AsIdentifier()->Name(), " does not exist on this type."},
103 property_->Start());
104 }
105 case ir::AstNodeType::NUMBER_LITERAL: {
106 checker->ThrowTypeError(
107 {"Property ", property_->AsNumberLiteral()->Str(), " does not exist on this type."},
108 property_->Start());
109 }
110 case ir::AstNodeType::STRING_LITERAL: {
111 checker->ThrowTypeError(
112 {"Property ", property_->AsStringLiteral()->Str(), " does not exist on this type."},
113 property_->Start());
114 }
115 default: {
116 UNREACHABLE();
117 }
118 }
119 }
120
121 binder::Variable *prop = checker->GetPropertyOfType(baseType, property_->AsIdentifier()->Name());
122
123 if (prop) {
124 checker::Type *propType = checker->GetTypeOfVariable(prop);
125 if (prop->HasFlag(binder::VariableFlags::READONLY)) {
126 propType->AddTypeFlag(checker::TypeFlag::READONLY);
127 }
128
129 return propType;
130 }
131
132 if (baseType->IsObjectType()) {
133 checker::ObjectType *objType = baseType->AsObjectType();
134
135 if (objType->StringIndexInfo()) {
136 checker::Type *indexType = objType->StringIndexInfo()->GetType();
137 if (objType->StringIndexInfo()->Readonly()) {
138 indexType->AddTypeFlag(checker::TypeFlag::READONLY);
139 }
140
141 return indexType;
142 }
143 }
144
145 checker->ThrowTypeError({"Property ", property_->AsIdentifier()->Name(), " does not exist on this type."},
146 property_->Start());
147 return nullptr;
148 }
149
UpdateSelf(const NodeUpdater & cb,binder::Binder * binder)150 void MemberExpression::UpdateSelf(const NodeUpdater &cb, [[maybe_unused]] binder::Binder *binder)
151 {
152 object_ = std::get<ir::AstNode *>(cb(object_))->AsExpression();
153 property_ = std::get<ir::AstNode *>(cb(property_))->AsExpression();
154 }
155
156 } // namespace panda::es2panda::ir
157