1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
//===- ExprCXX.cpp - (C++) Expression AST Node Implementation -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the subclesses of Expr class declared in ExprCXX.h
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ExprConcepts.h"
#include "clang/AST/ASTConcept.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ComputeDependence.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/DeclarationName.h"
#include "clang/AST/DependenceFlags.h"
#include "clang/AST/Expr.h"
#include "clang/AST/NestedNameSpecifier.h"
#include "clang/AST/TemplateBase.h"
#include "clang/AST/Type.h"
#include "clang/Basic/SourceLocation.h"
#include "llvm/Support/TrailingObjects.h"
#include <algorithm>
#include <string>
#include <utility>
using namespace clang;
ConceptSpecializationExpr::ConceptSpecializationExpr(
const ASTContext &C, NestedNameSpecifierLoc NNS,
SourceLocation TemplateKWLoc, DeclarationNameInfo ConceptNameInfo,
NamedDecl *FoundDecl, ConceptDecl *NamedConcept,
const ASTTemplateArgumentListInfo *ArgsAsWritten,
ImplicitConceptSpecializationDecl *SpecDecl,
const ConstraintSatisfaction *Satisfaction)
: Expr(ConceptSpecializationExprClass, C.BoolTy, VK_PRValue, OK_Ordinary),
ConceptReference(NNS, TemplateKWLoc, ConceptNameInfo, FoundDecl,
NamedConcept, ArgsAsWritten),
SpecDecl(SpecDecl),
Satisfaction(Satisfaction
? ASTConstraintSatisfaction::Create(C, *Satisfaction)
: nullptr) {
setDependence(computeDependence(this, /*ValueDependent=*/!Satisfaction));
// Currently guaranteed by the fact concepts can only be at namespace-scope.
assert(!NestedNameSpec ||
(!NestedNameSpec.getNestedNameSpecifier()->isInstantiationDependent() &&
!NestedNameSpec.getNestedNameSpecifier()
->containsUnexpandedParameterPack()));
assert((!isValueDependent() || isInstantiationDependent()) &&
"should not be value-dependent");
}
ConceptSpecializationExpr::ConceptSpecializationExpr(EmptyShell Empty)
: Expr(ConceptSpecializationExprClass, Empty) {}
ConceptSpecializationExpr *ConceptSpecializationExpr::Create(
const ASTContext &C, NestedNameSpecifierLoc NNS,
SourceLocation TemplateKWLoc, DeclarationNameInfo ConceptNameInfo,
NamedDecl *FoundDecl, ConceptDecl *NamedConcept,
const ASTTemplateArgumentListInfo *ArgsAsWritten,
ImplicitConceptSpecializationDecl *SpecDecl,
const ConstraintSatisfaction *Satisfaction) {
return new (C) ConceptSpecializationExpr(
C, NNS, TemplateKWLoc, ConceptNameInfo, FoundDecl, NamedConcept,
ArgsAsWritten, SpecDecl, Satisfaction);
}
ConceptSpecializationExpr::ConceptSpecializationExpr(
const ASTContext &C, ConceptDecl *NamedConcept,
ImplicitConceptSpecializationDecl *SpecDecl,
const ConstraintSatisfaction *Satisfaction, bool Dependent,
bool ContainsUnexpandedParameterPack)
: Expr(ConceptSpecializationExprClass, C.BoolTy, VK_PRValue, OK_Ordinary),
ConceptReference(NestedNameSpecifierLoc(), SourceLocation(),
DeclarationNameInfo(), NamedConcept, NamedConcept,
nullptr),
SpecDecl(SpecDecl),
Satisfaction(Satisfaction
? ASTConstraintSatisfaction::Create(C, *Satisfaction)
: nullptr) {
ExprDependence D = ExprDependence::None;
if (!Satisfaction)
D |= ExprDependence::Value;
if (Dependent)
D |= ExprDependence::Instantiation;
if (ContainsUnexpandedParameterPack)
D |= ExprDependence::UnexpandedPack;
setDependence(D);
}
ConceptSpecializationExpr *ConceptSpecializationExpr::Create(
const ASTContext &C, ConceptDecl *NamedConcept,
ImplicitConceptSpecializationDecl *SpecDecl,
const ConstraintSatisfaction *Satisfaction, bool Dependent,
bool ContainsUnexpandedParameterPack) {
return new (C)
ConceptSpecializationExpr(C, NamedConcept, SpecDecl, Satisfaction,
Dependent, ContainsUnexpandedParameterPack);
}
const TypeConstraint *
concepts::ExprRequirement::ReturnTypeRequirement::getTypeConstraint() const {
assert(isTypeConstraint());
auto TPL =
TypeConstraintInfo.getPointer().get<TemplateParameterList *>();
return cast<TemplateTypeParmDecl>(TPL->getParam(0))
->getTypeConstraint();
}
RequiresExpr::RequiresExpr(ASTContext &C, SourceLocation RequiresKWLoc,
RequiresExprBodyDecl *Body,
ArrayRef<ParmVarDecl *> LocalParameters,
ArrayRef<concepts::Requirement *> Requirements,
SourceLocation RBraceLoc)
: Expr(RequiresExprClass, C.BoolTy, VK_PRValue, OK_Ordinary),
NumLocalParameters(LocalParameters.size()),
NumRequirements(Requirements.size()), Body(Body), RBraceLoc(RBraceLoc) {
RequiresExprBits.IsSatisfied = false;
RequiresExprBits.RequiresKWLoc = RequiresKWLoc;
bool Dependent = false;
bool ContainsUnexpandedParameterPack = false;
for (ParmVarDecl *P : LocalParameters) {
Dependent |= P->getType()->isInstantiationDependentType();
ContainsUnexpandedParameterPack |=
P->getType()->containsUnexpandedParameterPack();
}
RequiresExprBits.IsSatisfied = true;
for (concepts::Requirement *R : Requirements) {
Dependent |= R->isDependent();
ContainsUnexpandedParameterPack |= R->containsUnexpandedParameterPack();
if (!Dependent) {
RequiresExprBits.IsSatisfied = R->isSatisfied();
if (!RequiresExprBits.IsSatisfied)
break;
}
}
std::copy(LocalParameters.begin(), LocalParameters.end(),
getTrailingObjects<ParmVarDecl *>());
std::copy(Requirements.begin(), Requirements.end(),
getTrailingObjects<concepts::Requirement *>());
RequiresExprBits.IsSatisfied |= Dependent;
// FIXME: move the computing dependency logic to ComputeDependence.h
if (ContainsUnexpandedParameterPack)
setDependence(getDependence() | ExprDependence::UnexpandedPack);
// FIXME: this is incorrect for cases where we have a non-dependent
// requirement, but its parameters are instantiation-dependent. RequiresExpr
// should be instantiation-dependent if it has instantiation-dependent
// parameters.
if (Dependent)
setDependence(getDependence() | ExprDependence::ValueInstantiation);
}
RequiresExpr::RequiresExpr(ASTContext &C, EmptyShell Empty,
unsigned NumLocalParameters,
unsigned NumRequirements)
: Expr(RequiresExprClass, Empty), NumLocalParameters(NumLocalParameters),
NumRequirements(NumRequirements) { }
RequiresExpr *
RequiresExpr::Create(ASTContext &C, SourceLocation RequiresKWLoc,
RequiresExprBodyDecl *Body,
ArrayRef<ParmVarDecl *> LocalParameters,
ArrayRef<concepts::Requirement *> Requirements,
SourceLocation RBraceLoc) {
void *Mem =
C.Allocate(totalSizeToAlloc<ParmVarDecl *, concepts::Requirement *>(
LocalParameters.size(), Requirements.size()),
alignof(RequiresExpr));
return new (Mem) RequiresExpr(C, RequiresKWLoc, Body, LocalParameters,
Requirements, RBraceLoc);
}
RequiresExpr *
RequiresExpr::Create(ASTContext &C, EmptyShell Empty,
unsigned NumLocalParameters, unsigned NumRequirements) {
void *Mem =
C.Allocate(totalSizeToAlloc<ParmVarDecl *, concepts::Requirement *>(
NumLocalParameters, NumRequirements),
alignof(RequiresExpr));
return new (Mem) RequiresExpr(C, Empty, NumLocalParameters, NumRequirements);
}
|
