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Revert 374882 "[Concepts] Concept Specialization Expressions" 

This reverts commit ec87b00382.
The test fails on Windows, see e.g.
http://lab.llvm.org:8011/builders/clang-x64-windows-msvc/builds/11533/steps/stage%201%20check/logs/stdio

Also revert follow-up r374893.

llvm-svn: 374899
This commit is contained in:
Nico Weber 2019-10-15 14:46:39 +00:00
parent 52d2a567b5
commit b4638f9ff0
37 changed files with 228 additions and 827 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

121
clang/include/clang/AST/ExprCXX.h
View File

@ -17,7 +17,6 @@
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/DeclarationName.h"
#include "clang/AST/Expr.h"
#include "clang/AST/NestedNameSpecifier.h"
@ -57,7 +56,6 @@ class IdentifierInfo;
class LambdaCapture;
class NonTypeTemplateParmDecl;
class TemplateParameterList;
class Sema;
//===--------------------------------------------------------------------===//
// C++ Expressions.
@ -4752,125 +4750,6 @@ public:
}
};
/// \brief Represents the specialization of a concept - evaluates to a prvalue
/// of type bool.
///
/// According to C++2a [expr.prim.id]p3 an id-expression that denotes the
/// specialization of a concept results in a prvalue of type bool.
class ConceptSpecializationExpr final : public Expr,
private llvm::TrailingObjects<ConceptSpecializationExpr,
TemplateArgument> {
friend class ASTStmtReader;
friend TrailingObjects;
// \brief The optional nested name specifier used when naming the concept.
NestedNameSpecifierLoc NestedNameSpec;
/// \brief The location of the template keyword, if specified when naming the
/// concept.
SourceLocation TemplateKWLoc;
/// \brief The location of the concept name in the expression.
SourceLocation ConceptNameLoc;
/// \brief The declaration found by name lookup when the expression was
/// created.
/// Can differ from NamedConcept when, for example, the concept was found
/// through a UsingShadowDecl.
NamedDecl *FoundDecl;
/// \brief The concept named, and whether or not the concept with the given
/// arguments was satisfied when the expression was created.
/// If any of the template arguments are dependent (this expr would then be
/// isValueDependent()), this bit is to be ignored.
llvm::PointerIntPair<ConceptDecl *, 1, bool> NamedConcept;
/// \brief The template argument list source info used to specialize the
/// concept.
const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
/// \brief The number of template arguments in the tail-allocated list of
/// converted template arguments.
unsigned NumTemplateArgs;
ConceptSpecializationExpr(ASTContext &C, NestedNameSpecifierLoc NNS,
SourceLocation TemplateKWLoc,
SourceLocation ConceptNameLoc, NamedDecl *FoundDecl,
ConceptDecl *NamedConcept,
const ASTTemplateArgumentListInfo *ArgsAsWritten,
ArrayRef<TemplateArgument> ConvertedArgs,
Optional<bool> IsSatisfied);
ConceptSpecializationExpr(EmptyShell Empty, unsigned NumTemplateArgs);
public:
static ConceptSpecializationExpr *
Create(ASTContext &C, NestedNameSpecifierLoc NNS,
SourceLocation TemplateKWLoc, SourceLocation ConceptNameLoc,
NamedDecl *FoundDecl, ConceptDecl *NamedConcept,
const ASTTemplateArgumentListInfo *ArgsAsWritten,
ArrayRef<TemplateArgument> ConvertedArgs, Optional<bool> IsSatisfied);
static ConceptSpecializationExpr *
Create(ASTContext &C, EmptyShell Empty, unsigned NumTemplateArgs);
const NestedNameSpecifierLoc &getNestedNameSpecifierLoc() const {
return NestedNameSpec;
}
NamedDecl *getFoundDecl() const {
return FoundDecl;
}
ConceptDecl *getNamedConcept() const {
return NamedConcept.getPointer();
}
ArrayRef<TemplateArgument> getTemplateArguments() const {
return ArrayRef<TemplateArgument>(getTrailingObjects<TemplateArgument>(),
NumTemplateArgs);
}
const ASTTemplateArgumentListInfo *getTemplateArgsAsWritten() const {
return ArgsAsWritten;
}
/// \brief Set new template arguments for this concept specialization.
void setTemplateArguments(const ASTTemplateArgumentListInfo *ArgsAsWritten,
ArrayRef<TemplateArgument> Converted);
/// \brief Whether or not the concept with the given arguments was satisfied
/// when the expression was created. This method assumes that the expression
/// is not dependent!
bool isSatisfied() const {
assert(!isValueDependent()
&& "isSatisfied called on a dependent ConceptSpecializationExpr");
return NamedConcept.getInt();
}
SourceLocation getConceptNameLoc() const { return ConceptNameLoc; }
SourceLocation getTemplateKWLoc() const { return TemplateKWLoc; }
static bool classof(const Stmt *T) {
return T->getStmtClass() == ConceptSpecializationExprClass;
}
SourceLocation getBeginLoc() const LLVM_READONLY { return ConceptNameLoc; }
SourceLocation getEndLoc() const LLVM_READONLY {
return ArgsAsWritten->RAngleLoc;
}
// Iterators
child_range children() {
return child_range(child_iterator(), child_iterator());
}
const_child_range children() const {
return const_child_range(const_child_iterator(), const_child_iterator());
}
};
} // namespace clang
#endif // LLVM_CLANG_AST_EXPRCXX_H

6
clang/include/clang/AST/RecursiveASTVisitor.h
View File

@ -2659,12 +2659,6 @@ DEF_TRAVERSE_STMT(CoyieldExpr, {
}
})
DEF_TRAVERSE_STMT(ConceptSpecializationExpr, {
TRY_TO(TraverseTemplateArgumentLocsHelper(
S->getTemplateArgsAsWritten()->getTemplateArgs(),
S->getTemplateArgsAsWritten()->NumTemplateArgs));
})
// These literals (all of them) do not need any action.
DEF_TRAVERSE_STMT(IntegerLiteral, {})
DEF_TRAVERSE_STMT(FixedPointLiteral, {})

11
clang/include/clang/Basic/DiagnosticSemaKinds.td
View File

@ -2526,6 +2526,8 @@ def note_private_extern : Note<
"use __attribute__((visibility(\"hidden\"))) attribute instead">;
// C++ Concepts
def err_concept_initialized_with_non_bool_type : Error<
"constraint expression must be of type 'bool' but is of type %0">;
def err_concept_decls_may_only_appear_in_global_namespace_scope : Error<
"concept declarations may only appear in global or namespace scope">;
def err_concept_no_parameters : Error<
@ -2537,11 +2539,6 @@ def err_concept_no_associated_constraints : Error<
"concept cannot have associated constraints">;
def err_concept_not_implemented : Error<
"sorry, unimplemented concepts feature %0 used">;
def err_non_constant_constraint_expression : Error<
"substitution into constraint expression resulted in a non-constant "
"expression">;
def err_non_bool_atomic_constraint : Error<
"atomic constraint must be of type 'bool' (found %0)">;
def err_template_different_associated_constraints : Error<
"associated constraints differ in template redeclaration">;
@ -4499,10 +4496,6 @@ def note_prior_template_arg_substitution : Note<
" template parameter%1 %2">;
def note_template_default_arg_checking : Note<
"while checking a default template argument used here">;
def note_concept_specialization_here : Note<
"while checking the satisfaction of concept '%0' requested here">;
def note_constraint_substitution_here : Note<
"while substituting template arguments into constraint expression here">;
def note_instantiation_contexts_suppressed : Note<
"(skipping %0 context%s0 in backtrace; use -ftemplate-backtrace-limit=0 to "
"see all)">;

3
clang/include/clang/Basic/StmtNodes.td
View File

@ -163,9 +163,6 @@ def CoawaitExpr : DStmt<CoroutineSuspendExpr>;
def DependentCoawaitExpr : DStmt<Expr>;
def CoyieldExpr : DStmt<CoroutineSuspendExpr>;
// C++2a Concepts expressions
def ConceptSpecializationExpr : DStmt<Expr>;
// Obj-C Expressions.
def ObjCStringLiteral : DStmt<Expr>;
def ObjCBoxedExpr : DStmt<Expr>;

43
clang/include/clang/Sema/Sema.h
View File

@ -6047,16 +6047,7 @@ public:
CXXConversionDecl *Conv,
Expr *Src);
/// Check whether the given expression is a valid constraint expression.
/// A diagnostic is emitted if it is not, and false is returned.
bool CheckConstraintExpression(Expr *CE);
bool CalculateConstraintSatisfaction(ConceptDecl *NamedConcept,
MultiLevelTemplateArgumentList &MLTAL,
Expr *ConstraintExpr,
bool &IsSatisfied);
// ParseObjCStringLiteral - Parse Objective-C string literals.
// ParseObjCStringLiteral - Parse Objective-C string literals.
ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs,
ArrayRef<Expr *> Strings);
@ -6727,9 +6718,9 @@ public:
ExprResult
CheckConceptTemplateId(const CXXScopeSpec &SS,
SourceLocation TemplateKWLoc,
SourceLocation ConceptNameLoc, NamedDecl *FoundDecl,
ConceptDecl *NamedConcept,
const DeclarationNameInfo &NameInfo,
ConceptDecl *Template,
SourceLocation TemplateLoc,
const TemplateArgumentListInfo *TemplateArgs);
void diagnoseMissingTemplateArguments(TemplateName Name, SourceLocation Loc);
@ -7648,15 +7639,6 @@ public:
/// member).
DefiningSynthesizedFunction,
// We are checking the constraints associated with a constrained entity or
// the constraint expression of a concept. This includes the checks that
// atomic constraints have the type 'bool' and that they can be constant
// evaluated.
ConstraintsCheck,
// We are substituting template arguments into a constraint expression.
ConstraintSubstitution,
/// Added for Template instantiation observation.
/// Memoization means we are _not_ instantiating a template because
/// it is already instantiated (but we entered a context where we
@ -7917,23 +7899,6 @@ public:
ArrayRef<TemplateArgument> TemplateArgs,
SourceRange InstantiationRange);
struct ConstraintsCheck {};
/// \brief Note that we are checking the constraints associated with some
/// constrained entity (a concept declaration or a template with associated
/// constraints).
InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
ConstraintsCheck, TemplateDecl *Template,
ArrayRef<TemplateArgument> TemplateArgs,
SourceRange InstantiationRange);
struct ConstraintSubstitution {};
/// \brief Note that we are checking a constraint expression associated
/// with a template declaration or as part of the satisfaction check of a
/// concept.
InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation,
ConstraintSubstitution, TemplateDecl *Template,
sema::TemplateDeductionInfo &DeductionInfo,
SourceRange InstantiationRange);
/// Note that we have finished instantiating this template.
void Clear();

1
clang/include/clang/Serialization/ASTBitCodes.h
View File

@ -1915,7 +1915,6 @@ namespace serialization {
EXPR_FUNCTION_PARM_PACK, // FunctionParmPackExpr
EXPR_MATERIALIZE_TEMPORARY, // MaterializeTemporaryExpr
EXPR_CXX_FOLD, // CXXFoldExpr
EXPR_CONCEPT_SPECIALIZATION,// ConceptSpecializationExpr
// CUDA
EXPR_CUDA_KERNEL_CALL, // CUDAKernelCallExpr

1
clang/lib/AST/Expr.cpp
View File

@ -3403,7 +3403,6 @@ bool Expr::HasSideEffects(const ASTContext &Ctx,
case CXXUuidofExprClass:
case OpaqueValueExprClass:
case SourceLocExprClass:
case ConceptSpecializationExprClass:
// These never have a side-effect.
return false;

79
clang/lib/AST/ExprCXX.cpp
View File

@ -1680,82 +1680,3 @@ CUDAKernelCallExpr *CUDAKernelCallExpr::CreateEmpty(const ASTContext &Ctx,
alignof(CUDAKernelCallExpr));
return new (Mem) CUDAKernelCallExpr(NumArgs, Empty);
}
ConceptSpecializationExpr::ConceptSpecializationExpr(ASTContext &C,
NestedNameSpecifierLoc NNS, SourceLocation TemplateKWLoc,
SourceLocation ConceptNameLoc, NamedDecl *FoundDecl,
ConceptDecl *NamedConcept, const ASTTemplateArgumentListInfo *ArgsAsWritten,
ArrayRef<TemplateArgument> ConvertedArgs, Optional<bool> IsSatisfied)
: Expr(ConceptSpecializationExprClass, C.BoolTy, VK_RValue, OK_Ordinary,
/*TypeDependent=*/false,
// All the flags below are set in setTemplateArguments.
/*ValueDependent=*/!IsSatisfied.hasValue(),
/*InstantiationDependent=*/false,
/*ContainsUnexpandedParameterPacks=*/false),
NestedNameSpec(NNS), TemplateKWLoc(TemplateKWLoc),
ConceptNameLoc(ConceptNameLoc), FoundDecl(FoundDecl),
NamedConcept(NamedConcept, IsSatisfied ? *IsSatisfied : true),
NumTemplateArgs(ConvertedArgs.size()) {
setTemplateArguments(ArgsAsWritten, ConvertedArgs);
}
ConceptSpecializationExpr::ConceptSpecializationExpr(EmptyShell Empty,
unsigned NumTemplateArgs)
: Expr(ConceptSpecializationExprClass, Empty),
NumTemplateArgs(NumTemplateArgs) { }
void ConceptSpecializationExpr::setTemplateArguments(
const ASTTemplateArgumentListInfo *ArgsAsWritten,
ArrayRef<TemplateArgument> Converted) {
assert(Converted.size() == NumTemplateArgs);
assert(!this->ArgsAsWritten && "setTemplateArguments can only be used once");
this->ArgsAsWritten = ArgsAsWritten;
std::uninitialized_copy(Converted.begin(), Converted.end(),
getTrailingObjects<TemplateArgument>());
bool IsInstantiationDependent = false;
bool ContainsUnexpandedParameterPack = false;
for (const TemplateArgumentLoc& LocInfo : ArgsAsWritten->arguments()) {
if (LocInfo.getArgument().isInstantiationDependent())
IsInstantiationDependent = true;
if (LocInfo.getArgument().containsUnexpandedParameterPack())
ContainsUnexpandedParameterPack = true;
if (ContainsUnexpandedParameterPack && IsInstantiationDependent)
break;
}
// Currently guaranteed by the fact concepts can only be at namespace-scope.
assert(!NestedNameSpec ||
(!NestedNameSpec.getNestedNameSpecifier()->isInstantiationDependent() &&
!NestedNameSpec.getNestedNameSpecifier()
->containsUnexpandedParameterPack()));
setInstantiationDependent(IsInstantiationDependent);
setContainsUnexpandedParameterPack(ContainsUnexpandedParameterPack);
assert((!isValueDependent() || isInstantiationDependent()) &&
"should not be value-dependent");
}
ConceptSpecializationExpr *
ConceptSpecializationExpr::Create(ASTContext &C, NestedNameSpecifierLoc NNS,
SourceLocation TemplateKWLoc,
SourceLocation ConceptNameLoc,
NamedDecl *FoundDecl,
ConceptDecl *NamedConcept,
const ASTTemplateArgumentListInfo *ArgsAsWritten,
ArrayRef<TemplateArgument> ConvertedArgs,
Optional<bool> IsSatisfied) {
void *Buffer = C.Allocate(totalSizeToAlloc<TemplateArgument>(
ConvertedArgs.size()));
return new (Buffer) ConceptSpecializationExpr(C, NNS, TemplateKWLoc,
ConceptNameLoc, FoundDecl,
NamedConcept, ArgsAsWritten,
ConvertedArgs, IsSatisfied);
}
ConceptSpecializationExpr *
ConceptSpecializationExpr::Create(ASTContext &C, EmptyShell Empty,
unsigned NumTemplateArgs) {
void *Buffer = C.Allocate(totalSizeToAlloc<TemplateArgument>(
NumTemplateArgs));
return new (Buffer) ConceptSpecializationExpr(Empty, NumTemplateArgs);
}

1
clang/lib/AST/ExprClassification.cpp
View File

@ -192,7 +192,6 @@ static Cl::Kinds ClassifyInternal(ASTContext &Ctx, const Expr *E) {
case Expr::NoInitExprClass:
case Expr::DesignatedInitUpdateExprClass:
case Expr::SourceLocExprClass:
case Expr::ConceptSpecializationExprClass:
return Cl::CL_PRValue;
case Expr::ConstantExprClass:

8
clang/lib/AST/ExprConstant.cpp
View File

@ -9768,7 +9768,6 @@ public:
bool VisitCXXNoexceptExpr(const CXXNoexceptExpr *E);
bool VisitSizeOfPackExpr(const SizeOfPackExpr *E);
bool VisitSourceLocExpr(const SourceLocExpr *E);
bool VisitConceptSpecializationExpr(const ConceptSpecializationExpr *E);
// FIXME: Missing: array subscript of vector, member of vector
};
@ -12251,12 +12250,6 @@ bool IntExprEvaluator::VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) {
return Success(E->getValue(), E);
}
bool IntExprEvaluator::VisitConceptSpecializationExpr(
const ConceptSpecializationExpr *E) {
return Success(E->isSatisfied(), E);
}
bool FixedPointExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) {
switch (E->getOpcode()) {
default:
@ -13930,7 +13923,6 @@ static ICEDiag CheckICE(const Expr* E, const ASTContext &Ctx) {
case Expr::CXXBoolLiteralExprClass:
case Expr::CXXScalarValueInitExprClass:
case Expr::TypeTraitExprClass:
case Expr::ConceptSpecializationExprClass:
case Expr::ArrayTypeTraitExprClass:
case Expr::ExpressionTraitExprClass:
case Expr::CXXNoexceptExprClass:

1
clang/lib/AST/ItaniumMangle.cpp
View File

@ -3658,7 +3658,6 @@ recurse:
case Expr::ConvertVectorExprClass:
case Expr::StmtExprClass:
case Expr::TypeTraitExprClass:
case Expr::ConceptSpecializationExprClass:
case Expr::ArrayTypeTraitExprClass:
case Expr::ExpressionTraitExprClass:
case Expr::VAArgExprClass:

11
clang/lib/AST/StmtPrinter.cpp
View File

@ -2231,17 +2231,6 @@ void StmtPrinter::VisitCXXFoldExpr(CXXFoldExpr *E) {
OS << ")";
}
void StmtPrinter::VisitConceptSpecializationExpr(ConceptSpecializationExpr *E) {
NestedNameSpecifierLoc NNS = E->getNestedNameSpecifierLoc();
if (NNS)
NNS.getNestedNameSpecifier()->print(OS, Policy);
if (E->getTemplateKWLoc().isValid())
OS << "template ";
OS << E->getFoundDecl()->getName();
printTemplateArgumentList(OS, E->getTemplateArgsAsWritten()->arguments(),
Policy);
}
// C++ Coroutines TS
void StmtPrinter::VisitCoroutineBodyStmt(CoroutineBodyStmt *S) {

8
clang/lib/AST/StmtProfile.cpp
View File

@ -1309,14 +1309,6 @@ void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
ID.AddInteger(S->getOp());
}
void StmtProfiler::VisitConceptSpecializationExpr(
const ConceptSpecializationExpr *S) {
VisitExpr(S);
VisitDecl(S->getFoundDecl());
VisitTemplateArguments(S->getTemplateArgsAsWritten()->getTemplateArgs(),
S->getTemplateArgsAsWritten()->NumTemplateArgs);
}
static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
UnaryOperatorKind &UnaryOp,
BinaryOperatorKind &BinaryOp) {

4
clang/lib/CodeGen/CGExprScalar.cpp
View File

@ -673,10 +673,6 @@ public:
return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue());
}
Value *VisitConceptSpecializationExpr(const ConceptSpecializationExpr *E) {
return Builder.getInt1(E->isSatisfied());
}
Value *VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) {
return llvm::ConstantInt::get(Builder.getInt32Ty(), E->getValue());
}

4
clang/lib/Frontend/FrontendActions.cpp
View File

@ -417,10 +417,6 @@ private:
return "DefiningSynthesizedFunction";
case CodeSynthesisContext::Memoization:
return "Memoization";
case CodeSynthesisContext::ConstraintsCheck:
return "ConstraintsCheck";
case CodeSynthesisContext::ConstraintSubstitution:
return "ConstraintSubstitution";
}
return "";
}

12
clang/lib/Parse/ParseExpr.cpp
View File

@ -228,16 +228,18 @@ ExprResult Parser::ParseCaseExpression(SourceLocation CaseLoc) {
/// Parse a constraint-expression.
///
/// \verbatim
/// constraint-expression: C++2a[temp.constr.decl]p1
/// constraint-expression: [Concepts TS temp.constr.decl p1]
/// logical-or-expression
/// \endverbatim
ExprResult Parser::ParseConstraintExpression() {
EnterExpressionEvaluationContext ConstantEvaluated(
Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
// FIXME: this may erroneously consume a function-body as the braced
// initializer list of a compound literal
//
// FIXME: this may erroneously consume a parenthesized rvalue reference
// declarator as a parenthesized address-of-label expression
ExprResult LHS(ParseCastExpression(/*isUnaryExpression=*/false));
ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::LogicalOr));
if (Res.isUsable() && !Actions.CheckConstraintExpression(Res.get()))
return ExprError();
return Res;
}

1
clang/lib/Sema/CMakeLists.txt
View File

@ -32,7 +32,6 @@ add_clang_library(clangSema
SemaCast.cpp
SemaChecking.cpp
SemaCodeComplete.cpp
SemaConcept.cpp
SemaConsumer.cpp
SemaCoroutine.cpp
SemaCUDA.cpp

125
clang/lib/Sema/SemaConcept.cpp
View File

@ -1,125 +0,0 @@
//===-- SemaConcept.cpp - Semantic Analysis for Constraints and Concepts --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements semantic analysis for C++ constraints and concepts.
//
//===----------------------------------------------------------------------===//
#include "clang/Sema/Sema.h"
#include "clang/Sema/SemaDiagnostic.h"
#include "clang/Sema/TemplateDeduction.h"
#include "clang/Sema/Template.h"
#include "clang/AST/ExprCXX.h"
using namespace clang;
using namespace sema;
bool Sema::CheckConstraintExpression(Expr *ConstraintExpression) {
// C++2a [temp.constr.atomic]p1
// ..E shall be a constant expression of type bool.
ConstraintExpression = ConstraintExpression->IgnoreParenImpCasts();
if (auto *BinOp = dyn_cast<BinaryOperator>(ConstraintExpression)) {
if (BinOp->getOpcode() == BO_LAnd || BinOp->getOpcode() == BO_LOr)
return CheckConstraintExpression(BinOp->getLHS()) &&
CheckConstraintExpression(BinOp->getRHS());
} else if (auto *C = dyn_cast<ExprWithCleanups>(ConstraintExpression))
return CheckConstraintExpression(C->getSubExpr());
// An atomic constraint!
if (ConstraintExpression->isTypeDependent())
return true;
QualType Type = ConstraintExpression->getType();
if (!Context.hasSameUnqualifiedType(Type, Context.BoolTy)) {
Diag(ConstraintExpression->getExprLoc(),
diag::err_non_bool_atomic_constraint) << Type
<< ConstraintExpression->getSourceRange();
return false;
}
return true;
}
bool
Sema::CalculateConstraintSatisfaction(ConceptDecl *NamedConcept,
MultiLevelTemplateArgumentList &MLTAL,
Expr *ConstraintExpr,
bool &IsSatisfied) {
ConstraintExpr = ConstraintExpr->IgnoreParenImpCasts();
if (auto *BO = dyn_cast<BinaryOperator>(ConstraintExpr)) {
if (BO->getOpcode() == BO_LAnd) {
if (CalculateConstraintSatisfaction(NamedConcept, MLTAL, BO->getLHS(),
IsSatisfied))
return true;
if (!IsSatisfied)
return false;
return CalculateConstraintSatisfaction(NamedConcept, MLTAL, BO->getRHS(),
IsSatisfied);
} else if (BO->getOpcode() == BO_LOr) {
if (CalculateConstraintSatisfaction(NamedConcept, MLTAL, BO->getLHS(),
IsSatisfied))
return true;
if (IsSatisfied)
return false;
return CalculateConstraintSatisfaction(NamedConcept, MLTAL, BO->getRHS(),
IsSatisfied);
}
}
else if (auto *C = dyn_cast<ExprWithCleanups>(ConstraintExpr))
return CalculateConstraintSatisfaction(NamedConcept, MLTAL, C->getSubExpr(),
IsSatisfied);
EnterExpressionEvaluationContext ConstantEvaluated(
*this, Sema::ExpressionEvaluationContext::ConstantEvaluated);
// Atomic constraint - substitute arguments and check satisfaction.
ExprResult E;
{
TemplateDeductionInfo Info(ConstraintExpr->getBeginLoc());
InstantiatingTemplate Inst(*this, ConstraintExpr->getBeginLoc(),
InstantiatingTemplate::ConstraintSubstitution{},
NamedConcept, Info,
ConstraintExpr->getSourceRange());
if (Inst.isInvalid())
return true;
// We do not want error diagnostics escaping here.
Sema::SFINAETrap Trap(*this);
E = SubstExpr(ConstraintExpr, MLTAL);
if (E.isInvalid() || Trap.hasErrorOccurred()) {
// C++2a [temp.constr.atomic]p1
// ...If substitution results in an invalid type or expression, the
// constraint is not satisfied.
IsSatisfied = false;
return false;
}
}
if (!CheckConstraintExpression(E.get()))
return true;
SmallVector<PartialDiagnosticAt, 2> EvaluationDiags;
Expr::EvalResult EvalResult;
EvalResult.Diag = &EvaluationDiags;
if (!E.get()->EvaluateAsRValue(EvalResult, Context)) {
// C++2a [temp.constr.atomic]p1
// ...E shall be a constant expression of type bool.
Diag(E.get()->getBeginLoc(),
diag::err_non_constant_constraint_expression)
<< E.get()->getSourceRange();
for (const PartialDiagnosticAt &PDiag : EvaluationDiags)
Diag(PDiag.first, PDiag.second);
return true;
}
IsSatisfied = EvalResult.Val.getInt().getBoolValue();
return false;
}

1
clang/lib/Sema/SemaExceptionSpec.cpp
View File

@ -1314,7 +1314,6 @@ CanThrowResult Sema::canThrow(const Expr *E) {
case Expr::SizeOfPackExprClass:
case Expr::StringLiteralClass:
case Expr::SourceLocExprClass:
case Expr::ConceptSpecializationExprClass:
// These expressions can never throw.
return CT_Cannot;

69
clang/lib/Sema/SemaTemplate.cpp
View File

@ -4271,47 +4271,14 @@ void Sema::diagnoseMissingTemplateArguments(TemplateName Name,
ExprResult
Sema::CheckConceptTemplateId(const CXXScopeSpec &SS,
SourceLocation TemplateKWLoc,
SourceLocation ConceptNameLoc,
NamedDecl *FoundDecl,
ConceptDecl *NamedConcept,
const DeclarationNameInfo &NameInfo,
ConceptDecl *Template,
SourceLocation TemplateLoc,
const TemplateArgumentListInfo *TemplateArgs) {
assert(NamedConcept && "A concept template id without a template?");
llvm::SmallVector<TemplateArgument, 4> Converted;
if (CheckTemplateArgumentList(NamedConcept, ConceptNameLoc,
const_cast<TemplateArgumentListInfo&>(*TemplateArgs),
/*PartialTemplateArgs=*/false, Converted,
/*UpdateArgsWithConversion=*/false))
return ExprError();
Optional<bool> IsSatisfied;
bool AreArgsDependent = false;
for (TemplateArgument &Arg : Converted) {
if (Arg.isDependent()) {
AreArgsDependent = true;
break;
}
}
if (!AreArgsDependent) {
InstantiatingTemplate Inst(*this, ConceptNameLoc,
InstantiatingTemplate::ConstraintsCheck{}, NamedConcept, Converted,
SourceRange(SS.isSet() ? SS.getBeginLoc() : ConceptNameLoc,
TemplateArgs->getRAngleLoc()));
MultiLevelTemplateArgumentList MLTAL;
MLTAL.addOuterTemplateArguments(Converted);
bool Satisfied;
if (CalculateConstraintSatisfaction(NamedConcept, MLTAL,
NamedConcept->getConstraintExpr(),
Satisfied))
return ExprError();
IsSatisfied = Satisfied;
}
return ConceptSpecializationExpr::Create(Context,
SS.isSet() ? SS.getWithLocInContext(Context) : NestedNameSpecifierLoc{},
TemplateKWLoc, ConceptNameLoc, FoundDecl, NamedConcept,
ASTTemplateArgumentListInfo::Create(Context, *TemplateArgs), Converted,
IsSatisfied);
// TODO: Do concept specialization here.
Diag(NameInfo.getBeginLoc(), diag::err_concept_not_implemented) <<
"concept specialization";
return ExprError();
}
ExprResult Sema::BuildTemplateIdExpr(const CXXScopeSpec &SS,
@ -4355,10 +4322,9 @@ ExprResult Sema::BuildTemplateIdExpr(const CXXScopeSpec &SS,
}
if (R.getAsSingle<ConceptDecl>() && !AnyDependentArguments()) {
return CheckConceptTemplateId(SS, TemplateKWLoc,
R.getLookupNameInfo().getBeginLoc(),
R.getFoundDecl(),
R.getAsSingle<ConceptDecl>(), TemplateArgs);
return CheckConceptTemplateId(SS, R.getLookupNameInfo(),
R.getAsSingle<ConceptDecl>(),
TemplateKWLoc, TemplateArgs);
}
// We don't want lookup warnings at this point.
@ -8088,7 +8054,20 @@ Decl *Sema::ActOnConceptDefinition(Scope *S,
ConceptDecl *NewDecl = ConceptDecl::Create(Context, DC, NameLoc, Name,
TemplateParameterLists.front(),
ConstraintExpr);
if (!ConstraintExpr->isTypeDependent() &&
ConstraintExpr->getType() != Context.BoolTy) {
// C++2a [temp.constr.atomic]p3:
// E shall be a constant expression of type bool.
// TODO: Do this check for individual atomic constraints
// and not the constraint expression. Probably should do it in
// ParseConstraintExpression.
Diag(ConstraintExpr->getSourceRange().getBegin(),
diag::err_concept_initialized_with_non_bool_type)
<< ConstraintExpr->getType();
NewDecl->setInvalidDecl();
}
if (NewDecl->getAssociatedConstraints()) {
// C++2a [temp.concept]p4:
// A concept shall not have associated constraints.

51
clang/lib/Sema/SemaTemplateInstantiate.cpp
View File

@ -198,14 +198,12 @@ bool Sema::CodeSynthesisContext::isInstantiationRecord() const {
case ExplicitTemplateArgumentSubstitution:
case DeducedTemplateArgumentSubstitution:
case PriorTemplateArgumentSubstitution:
case ConstraintsCheck:
return true;
case DefaultTemplateArgumentChecking:
case DeclaringSpecialMember:
case DefiningSynthesizedFunction:
case ExceptionSpecEvaluation:
case ConstraintSubstitution:
return false;
// This function should never be called when Kind's value is Memoization.
@ -360,24 +358,6 @@ Sema::InstantiatingTemplate::InstantiatingTemplate(
PointOfInstantiation, InstantiationRange, Param, Template,
TemplateArgs) {}
Sema::InstantiatingTemplate::InstantiatingTemplate(
Sema &SemaRef, SourceLocation PointOfInstantiation,
ConstraintsCheck, TemplateDecl *Template,
ArrayRef<TemplateArgument> TemplateArgs, SourceRange InstantiationRange)
: InstantiatingTemplate(
SemaRef, CodeSynthesisContext::ConstraintsCheck,
PointOfInstantiation, InstantiationRange, Template, nullptr,
TemplateArgs) {}
Sema::InstantiatingTemplate::InstantiatingTemplate(
Sema &SemaRef, SourceLocation PointOfInstantiation,
ConstraintSubstitution, TemplateDecl *Template,
sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange)
: InstantiatingTemplate(
SemaRef, CodeSynthesisContext::ConstraintSubstitution,
PointOfInstantiation, InstantiationRange, Template, nullptr,
{}, &DeductionInfo) {}
void Sema::pushCodeSynthesisContext(CodeSynthesisContext Ctx) {
Ctx.SavedInNonInstantiationSFINAEContext = InNonInstantiationSFINAEContext;
InNonInstantiationSFINAEContext = false;
@ -684,30 +664,6 @@ void Sema::PrintInstantiationStack() {
case CodeSynthesisContext::Memoization:
break;
case CodeSynthesisContext::ConstraintsCheck:
if (auto *CD = dyn_cast<ConceptDecl>(Active->Entity)) {
SmallVector<char, 128> TemplateArgsStr;
llvm::raw_svector_ostream OS(TemplateArgsStr);
CD->printName(OS);
printTemplateArgumentList(OS, Active->template_arguments(),
getPrintingPolicy());
Diags.Report(Active->PointOfInstantiation,
diag::note_concept_specialization_here)
<< OS.str()
<< Active->InstantiationRange;
break;
}
// TODO: Concepts - implement this for constrained templates and partial
// specializations.
llvm_unreachable("only concept constraints are supported right now");
break;
case CodeSynthesisContext::ConstraintSubstitution:
Diags.Report(Active->PointOfInstantiation,
diag::note_constraint_substitution_here)
<< Active->InstantiationRange;
break;
}
}
}
@ -731,7 +687,6 @@ Optional<TemplateDeductionInfo *> Sema::isSFINAEContext() const {
LLVM_FALLTHROUGH;
case CodeSynthesisContext::DefaultFunctionArgumentInstantiation:
case CodeSynthesisContext::ExceptionSpecInstantiation:
case CodeSynthesisContext::ConstraintsCheck:
// This is a template instantiation, so there is no SFINAE.
return None;
@ -745,10 +700,8 @@ Optional<TemplateDeductionInfo *> Sema::isSFINAEContext() const {
case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution:
case CodeSynthesisContext::DeducedTemplateArgumentSubstitution:
case CodeSynthesisContext::ConstraintSubstitution:
// We're either substituting explicitly-specified template arguments
// or deduced template arguments or a constraint expression, so SFINAE
// applies.
// We're either substitution explicitly-specified template arguments
// or deduced template arguments, so SFINAE applies.
assert(Active->DeductionInfo && "Missing deduction info pointer");
return Active->DeductionInfo;

36
clang/lib/Sema/TreeTransform.h
View File

@ -3019,25 +3019,6 @@ public:
///
/// By default, performs semantic analysis to build the new expression.
/// Subclasses may override this routine to provide different behavior.
ExprResult RebuildConceptSpecializationExpr(NestedNameSpecifierLoc NNS,
SourceLocation TemplateKWLoc, SourceLocation ConceptNameLoc,
NamedDecl *FoundDecl, ConceptDecl *NamedConcept,
TemplateArgumentListInfo *TALI) {
CXXScopeSpec SS;
SS.Adopt(NNS);
ExprResult Result = getSema().CheckConceptTemplateId(SS, TemplateKWLoc,
ConceptNameLoc,
FoundDecl,
NamedConcept, TALI);
if (Result.isInvalid())
return ExprError();
return Result;
}
/// \brief Build a new Objective-C boxed expression.
///
/// By default, performs semantic analysis to build the new expression.
/// Subclasses may override this routine to provide different behavior.
ExprResult RebuildObjCBoxedExpr(SourceRange SR, Expr *ValueExpr) {
return getSema().BuildObjCBoxedExpr(SR, ValueExpr);
}
@ -11033,23 +11014,6 @@ TreeTransform<Derived>::TransformTypeTraitExpr(TypeTraitExpr *E) {
E->getEndLoc());
}
template<typename Derived>
ExprResult
TreeTransform<Derived>::TransformConceptSpecializationExpr(
ConceptSpecializationExpr *E) {
const ASTTemplateArgumentListInfo *Old = E->getTemplateArgsAsWritten();
TemplateArgumentListInfo TransArgs(Old->LAngleLoc, Old->RAngleLoc);
if (getDerived().TransformTemplateArguments(Old->getTemplateArgs(),
Old->NumTemplateArgs, TransArgs))
return ExprError();
return getDerived().RebuildConceptSpecializationExpr(
E->getNestedNameSpecifierLoc(), E->getTemplateKWLoc(),
E->getConceptNameLoc(), E->getFoundDecl(), E->getNamedConcept(),
&TransArgs);
}
template<typename Derived>
ExprResult
TreeTransform<Derived>::TransformArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {

24
clang/lib/Serialization/ASTReaderStmt.cpp
View File

@ -734,24 +734,6 @@ void ASTStmtReader::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *E) {
E->setRParenLoc(ReadSourceLocation());
}
void ASTStmtReader::VisitConceptSpecializationExpr(
ConceptSpecializationExpr *E) {
VisitExpr(E);
unsigned NumTemplateArgs = Record.readInt();
E->NestedNameSpec = Record.readNestedNameSpecifierLoc();
E->TemplateKWLoc = Record.readSourceLocation();
E->ConceptNameLoc = Record.readSourceLocation();
E->FoundDecl = ReadDeclAs<NamedDecl>();
E->NamedConcept.setPointer(ReadDeclAs<ConceptDecl>());
const ASTTemplateArgumentListInfo *ArgsAsWritten =
Record.readASTTemplateArgumentListInfo();
llvm::SmallVector<TemplateArgument, 4> Args;
for (unsigned I = 0; I < NumTemplateArgs; ++I)
Args.push_back(Record.readTemplateArgument());
E->setTemplateArguments(ArgsAsWritten, Args);
E->NamedConcept.setInt(Record.readInt() == 1);
}
void ASTStmtReader::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
VisitExpr(E);
E->setLHS(Record.readSubExpr());
@ -3508,12 +3490,6 @@ Stmt *ASTReader::ReadStmtFromStream(ModuleFile &F) {
case EXPR_DEPENDENT_COAWAIT:
S = new (Context) DependentCoawaitExpr(Empty);
break;
case EXPR_CONCEPT_SPECIALIZATION:
unsigned numTemplateArgs = Record[ASTStmtReader::NumExprFields];
S = ConceptSpecializationExpr::Create(Context, Empty, numTemplateArgs);
break;
}
// We hit a STMT_STOP, so we're done with this expression.

18
clang/lib/Serialization/ASTWriterStmt.cpp
View File

@ -388,24 +388,6 @@ void ASTStmtWriter::VisitDependentCoawaitExpr(DependentCoawaitExpr *E) {
Code = serialization::EXPR_DEPENDENT_COAWAIT;
}
void ASTStmtWriter::VisitConceptSpecializationExpr(
ConceptSpecializationExpr *E) {
VisitExpr(E);
ArrayRef<TemplateArgument> TemplateArgs = E->getTemplateArguments();
Record.push_back(TemplateArgs.size());
Record.AddNestedNameSpecifierLoc(E->getNestedNameSpecifierLoc());
Record.AddSourceLocation(E->getTemplateKWLoc());
Record.AddSourceLocation(E->getConceptNameLoc());
Record.AddDeclRef(E->getFoundDecl());
Record.AddDeclRef(E->getNamedConcept());
Record.AddASTTemplateArgumentListInfo(E->getTemplateArgsAsWritten());
for (const TemplateArgument &Arg : TemplateArgs)
Record.AddTemplateArgument(Arg);
Record.push_back(E->isSatisfied());
Code = serialization::EXPR_CONCEPT_SPECIALIZATION;
}
void ASTStmtWriter::VisitCapturedStmt(CapturedStmt *S) {
VisitStmt(S);
// NumCaptures

1
clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
View File

@ -1370,7 +1370,6 @@ void ExprEngine::Visit(const Stmt *S, ExplodedNode *Pred,
case Stmt::CUDAKernelCallExprClass:
case Stmt::OpaqueValueExprClass:
case Stmt::AsTypeExprClass:
case Stmt::ConceptSpecializationExprClass:
// Fall through.
// Cases we intentionally don't evaluate, since they don't need

61
clang/test/CXX/concepts-ts/dcl.dcl/dcl.spec/dcl.spec.concept/p1.cpp Normal file
View File

@ -0,0 +1,61 @@
// RUN: %clang_cc1 -std=c++14 -fconcepts-ts -fcxx-exceptions -x c++ -verify %s
namespace A {
template<typename T> concept bool C1() { return true; }
template<typename T> concept bool C2 = true;
}
template<typename T> concept bool C3() { return (throw 0, true); }
static_assert(noexcept(C3<int>()), "function concept should be treated as if noexcept(true) specified");
template<typename T> concept bool D1(); // expected-error {{function concept declaration must be a definition}}
struct B {
template<typename T> concept bool D2() { return true; } // expected-error {{concept declarations may only appear in namespace scope}}
};
struct C {
template<typename T> static concept bool D3 = true; // expected-error {{concept declarations may only appear in namespace scope}}
};
concept bool D4() { return true; } // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
concept bool D5 = true; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
template<typename T>
concept bool D6; // expected-error {{variable concept declaration must be initialized}}
template<typename T>
concept bool D7() throw(int) { return true; } // expected-error {{function concept cannot have exception specification}}
// Tag
concept class CC1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
concept struct CS1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
concept union CU1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
concept enum CE1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
template <typename T> concept class TCC1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
template <typename T> concept struct TCS1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
template <typename T> concept union TCU1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
typedef concept int CI; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
void fpc(concept int i) {} // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
concept bool; // expected-error {{'concept' can only appear on the definition of a function template or variable template}}
template <typename T> concept bool VCEI{ true };
template concept bool VCEI<int>; // expected-error {{'concept' cannot be applied on an explicit instantiation}}
extern template concept bool VCEI<int>; // expected-error {{'concept' cannot be applied on an explicit instantiation}}
template <typename T> concept bool VCPS{ true };
template <typename T> concept bool VCPS<T *>{ true }; // expected-error {{'concept' cannot be applied on an partial specialization}}
template <typename T> concept bool VCES{ true };
template <> concept bool VCES<int>{ true }; // expected-error {{'concept' cannot be applied on an explicit specialization}}
template <typename T> concept bool FCEI() { return true; }
template concept bool FCEI<int>(); // expected-error {{'concept' cannot be applied on an explicit instantiation}}
extern template concept bool FCEI<int>(); // expected-error {{'concept' cannot be applied on an explicit instantiation}}
template <typename T> concept bool FCES() { return true; }
template <> concept bool FCES<bool>() { return true; } // expected-error {{'concept' cannot be applied on an explicit specialization}}

13
clang/test/CXX/concepts-ts/dcl.dcl/dcl.spec/dcl.spec.concept/p2.cpp Normal file
View File

@ -0,0 +1,13 @@
// RUN: %clang_cc1 -std=c++14 -fconcepts-ts -x c++ -verify %s
template<typename T> concept thread_local bool VCTL = true; // expected-error {{variable concept cannot be declared 'thread_local'}}
template<typename T> concept constexpr bool VCC = true; // expected-error {{variable concept cannot be declared 'constexpr'}}
template<typename T> concept inline bool FCI() { return true; } // expected-error {{function concept cannot be declared 'inline'}}
struct X {
template<typename T> concept friend bool FCF() { return true; } // expected-error {{function concept cannot be declared 'friend'}}
};
template<typename T> concept constexpr bool FCC() { return true; } // expected-error {{function concept cannot be declared 'constexpr'}}

25
clang/test/CXX/concepts-ts/dcl.dcl/dcl.spec/dcl.spec.concept/p5.cpp Normal file
View File

@ -0,0 +1,25 @@
// RUN: %clang_cc1 -std=c++14 -fconcepts-ts -x c++ -verify %s
template<typename T>
concept bool fcpv(void) { return true; }
template<typename T>
concept bool fcpi(int i = 0) { return true; } // expected-error {{function concept cannot have any parameters}}
template<typename... Ts>
concept bool fcpp(Ts... ts) { return true; } // expected-error {{function concept cannot have any parameters}}
template<typename T>
concept bool fcpva(...) { return true; } // expected-error {{function concept cannot have any parameters}}
template<typename T>
concept const bool fcrtc() { return true; } // expected-error {{declared return type of function concept must be 'bool'}}
template<typename T>
concept int fcrti() { return 5; } // expected-error {{declared return type of function concept must be 'bool'}}
template<typename T>
concept float fcrtf() { return 5.5; } // expected-error {{declared return type of function concept must be 'bool'}}
template<typename T>
concept decltype(auto) fcrtd(void) { return true; } // expected-error {{declared return type of function concept must be 'bool'}}

25
clang/test/CXX/concepts-ts/dcl.dcl/dcl.spec/dcl.spec.concept/p6.cpp Normal file
View File

@ -0,0 +1,25 @@
// RUN: %clang_cc1 -std=c++14 -fconcepts-ts -x c++ -verify %s
template<typename T>
concept bool vc { true };
template<typename T>
struct B { typedef bool Boolean; };
template<int N>
B<void>::Boolean concept vctb(!0);
template<typename T>
concept const bool vctc { true }; // expected-error {{declared type of variable concept must be 'bool'}}
template<typename T>
concept int vcti { 5 }; // expected-error {{declared type of variable concept must be 'bool'}}
template<typename T>
concept float vctf { 5.5 }; // expected-error {{declared type of variable concept must be 'bool'}}
template<typename T>
concept auto vcta { true }; // expected-error {{declared type of variable concept must be 'bool'}}
template<typename T>
concept decltype(auto) vctd { true }; // expected-error {{declared type of variable concept must be 'bool'}}

18
clang/test/CXX/concepts-ts/dcl.dcl/dcl.spec/dcl.spec.concept/p7.cpp Normal file
View File

@ -0,0 +1,18 @@
// RUN: %clang_cc1 -std=c++14 -fconcepts-ts -x c++ -verify %s
template <typename T> concept bool FCEI() { return true; } // expected-note {{previous declaration is here}} expected-note {{previous declaration is here}}
template bool FCEI<int>(); // expected-error {{function concept cannot be explicitly instantiated}}
extern template bool FCEI<double>(); // expected-error {{function concept cannot be explicitly instantiated}}
template <typename T> concept bool FCES() { return true; } // expected-note {{previous declaration is here}}
template <> bool FCES<int>() { return true; } // expected-error {{function concept cannot be explicitly specialized}}
template <typename T> concept bool VC { true }; // expected-note {{previous declaration is here}} expected-note {{previous declaration is here}}
template bool VC<int>; // expected-error {{variable concept cannot be explicitly instantiated}}
extern template bool VC<double>; // expected-error {{variable concept cannot be explicitly instantiated}}
template <typename T> concept bool VCES { true }; // expected-note {{previous declaration is here}}
template <> bool VCES<int> { true }; // expected-error {{variable concept cannot be explicitly specialized}}
template <typename T> concept bool VCPS { true }; // expected-note {{previous declaration is here}}
template <typename T> bool VCPS<T *> { true }; // expected-error {{variable concept cannot be partially specialized}}

26
clang/test/CXX/concepts-ts/dcl.dcl/lit.cfg.py Normal file
View File

@ -0,0 +1,26 @@
# -*- Python -*-
import os
import lit.formats
from lit.llvm import llvm_config
# Configuration file for the 'lit' test runner.
# name: The name of this test suite.
config.name = 'Clang-Concepts-TS-Unsupported'
# testFormat: The test format to use to interpret tests.
#
# For now we require '&&' between commands, until they get globally killed and
# the test runner updated.
config.test_format = lit.formats.ShTest(not llvm_config.use_lit_shell)
# suffixes: A list of file extensions to treat as test files.
config.suffixes = ['.c', '.cpp', '.cppm', '.m', '.mm', '.cu',
'.ll', '.cl', '.s', '.S', '.modulemap', '.test', '.rs']
config.unsupported = True
# test_source_root: The root path where tests are located.
config.test_source_root = os.path.dirname(__file__)

4
clang/test/CXX/concepts-ts/expr/expr.prim/expr.prim.id/p3.cpp Normal file
View File

@ -0,0 +1,4 @@
// RUN: %clang_cc1 -std=c++2a -fconcepts-ts -verify %s
template<typename T> concept C = true;
static_assert(C<int>); // expected-error{{sorry, unimplemented concepts feature concept specialization used}}

0
clang/test/CXX/temp/temp.constr/temp.constr.decl/class-template-decl.cpp → clang/test/CXX/concepts-ts/temp/temp.constr/temp.constr.decl/class-template-decl.cpp
View File

149
clang/test/CXX/expr/expr.prim/expr.prim.id/p3.cpp
View File

@ -1,149 +0,0 @@
// RUN: %clang_cc1 -std=c++2a -verify -triple x86_64-linux-gnu %s
template<typename T> concept C1 = true; // expected-note{{template is declared here}}
static_assert(C1<int>);
static_assert(C1);
// expected-error@-1{{use of concept 'C1' requires template arguments}}
template<typename T> concept C2 = sizeof(T) == 4;
static_assert(C2<int>);
static_assert(!C2<long long int>);
static_assert(C2<char[4]>);
static_assert(!C2<char[5]>);
template<typename T> concept C3 = sizeof(*T{}) == 4;
static_assert(C3<int*>);
static_assert(!C3<long long int>);
struct A {
static constexpr int add(int a, int b) {
return a + b;
}
};
struct B {
static int add(int a, int b) { // expected-note{{declared here}}
return a + b;
}
};
template<typename U>
concept C4 = U::add(1, 2) == 3;
// expected-error@-1{{substitution into constraint expression resulted in a non-constant expression}}
// expected-note@-2{{non-constexpr function 'add' cannot be used in a constant expression}}
static_assert(C4<A>);
static_assert(!C4<B>); // expected-note {{while checking the satisfaction of concept 'C4<B>' requested here}}
template<typename T, typename U>
constexpr bool is_same_v = false;
template<typename T>
constexpr bool is_same_v<T, T> = true;
template<typename T, typename U>
concept Same = is_same_v<T, U>;
static_assert(Same<int, int>);
static_assert(Same<int, decltype(1)>);
static_assert(!Same<int, unsigned int>);
static_assert(!Same<A, B>);
static_assert(Same<A, A>);
static_assert(Same<bool, decltype(C1<int>)>);
static_assert(Same<bool, decltype(C2<int>)>);
static_assert(Same<bool, decltype(C3<int*>)>);
static_assert(Same<bool, decltype(C4<A>)>);
template<typename T> concept C5 = T{}; // expected-error {{atomic constraint must be of type 'bool' (found 'int')}}
constexpr bool x = C5<int>; // expected-note {{while checking the satisfaction of concept 'C5<int>' requested here}}
template<int x>
concept IsEven = (x % 2) == 0;
static_assert(IsEven<20>);
static_assert(!IsEven<11>);
template<template<typename T> typename P>
concept IsTypePredicate = is_same_v<decltype(P<bool>::value), const bool>
&& is_same_v<decltype(P<int>::value), const bool>
&& is_same_v<decltype(P<long long>::value), const bool>;
template<typename T> struct T1 {};
template<typename T> struct T2 { static constexpr bool value = sizeof(T) == 2; };
static_assert(IsTypePredicate<T2>);
static_assert(!IsTypePredicate<T1>);
namespace piecewise_substitution {
template <typename T>
concept True = true;
template <typename T>
concept A = True<T> || T::value;
template <typename T>
concept B = (True<T> || T::value);
template <typename T>
concept C = !True<T> && T::value || true;
template <typename T>
concept D = (!True<T> && T::value) || true;
template <typename T>
concept E = T::value || True<T>;
template <typename T>
concept F = (T::value || True<T>);
template <typename T>
concept G = T::value && !True<T> || true;
template <typename T>
concept H = (T::value && !True<T>) || true;
template <typename T>
concept I = T::value;
static_assert(A<int>);
static_assert(B<int>);
static_assert(C<int>);
static_assert(D<int>);
static_assert(E<int>);
static_assert(F<int>);
static_assert(G<int>);
static_assert(H<int>);
static_assert(!I<int>);
}
// Short ciruiting
template<typename T> struct T3 { using type = typename T::type; };
// expected-error@-1{{type 'char' cannot be used prior to '::' because it has no members}}
// expected-error@-2{{type 'short' cannot be used prior to '::' because it has no members}}
template<typename T>
concept C6 = sizeof(T) == 1 && sizeof(typename T3<T>::type) == 1;
// expected-note@-1{{while substituting template arguments into constraint expression here}}
// expected-note@-2{{in instantiation of template class 'T3<char>' requested here}}
template<typename T>
concept C7 = sizeof(T) == 1 || sizeof(
// expected-note@-1{{while substituting template arguments into constraint expression here}}
typename
T3<T>
// expected-note@-1{{in instantiation of template class 'T3<short>' requested here}}
::type) == 1;
static_assert(!C6<short>);
static_assert(!C6<char>); // expected-note{{while checking the satisfaction of concept 'C6<char>' requested here}}
static_assert(C7<char>);
static_assert(!C7<short>); // expected-note{{while checking the satisfaction of concept 'C7<short>' requested here}}
// Make sure argument list is converted when instantiating a CSE.
template<typename T, typename U = int>
concept SameSize = sizeof(T) == sizeof(U);
template<typename T>
struct X { static constexpr bool a = SameSize<T>; };
static_assert(X<unsigned>::a);

32
clang/test/PCH/cxx2a-concept-specialization-expr.cpp
View File

@ -1,32 +0,0 @@
// RUN: %clang_cc1 -std=c++2a -emit-pch %s -o %t
// RUN: %clang_cc1 -std=c++2a -include-pch %t -verify %s
// expected-no-diagnostics
#ifndef HEADER
#define HEADER
template<typename... T>
concept C = true;
namespace n {
template<typename... T>
concept C = true;
}
void f() {
(void)C<int>;
(void)C<int, void>;
(void)n::C<void>;
}
#else /*included pch*/
int main() {
(void)C<int>;
(void)C<int, void>;
(void)n::C<void>;
f();
}
#endif // HEADER

61
clang/test/Parser/cxx2a-concept-declaration.cpp
View File

@ -14,6 +14,8 @@ template<template<typename> concept T> concept D2 = true;
// expected-error@-2{{template template parameter requires 'class' after the parameter list}}
// expected-error@-3{{concept template parameter list must have at least one parameter; explicit specialization of concepts is not allowed}}
template<typename T> concept C2 = 0.f; // expected-error {{constraint expression must be of type 'bool' but is of type 'float'}}
struct S1 {
template<typename T> concept C1 = true; // expected-error {{concept declarations may only appear in global or namespace scope}}
};
@ -24,15 +26,15 @@ extern "C++" {
template<typename A>
template<typename B>
concept C2 = true; // expected-error {{extraneous template parameter list in concept definition}}
concept C4 = true; // expected-error {{extraneous template parameter list in concept definition}}
template<typename T> concept C3 = true; // expected-note {{previous}} expected-note {{previous}}
int C3; // expected-error {{redefinition}}
struct C3 {}; // expected-error {{redefinition}}
template<typename T> concept C5 = true; // expected-note {{previous}} expected-note {{previous}}
int C5; // expected-error {{redefinition}}
struct C5 {}; // expected-error {{redefinition}}
struct C4 {}; // expected-note{{previous definition is here}}
template<typename T> concept C4 = true;
// expected-error@-1{{redefinition of 'C4' as different kind of symbol}}
struct C6 {}; // expected-note{{previous definition is here}}
template<typename T> concept C6 = true;
// expected-error@-1{{redefinition of 'C6' as different kind of symbol}}
// TODO: Add test to prevent explicit specialization, partial specialization
// and explicit instantiation of concepts.
@ -41,60 +43,31 @@ template<typename T, T v>
struct integral_constant { static constexpr T value = v; };
namespace N {
template<typename T> concept C5 = true;
template<typename T> concept C7 = true;
}
using N::C5;
using N::C7;
template <bool word> concept C6 = integral_constant<bool, wor>::value;
template <bool word> concept C8 = integral_constant<bool, wor>::value;
// expected-error@-1{{use of undeclared identifier 'wor'; did you mean 'word'?}}
// expected-note@-2{{'word' declared here}}
template<typename T> concept bool C7 = true;
template<typename T> concept bool C9 = true;
// expected-warning@-1{{ISO C++2a does not permit the 'bool' keyword after 'concept'}}
template<> concept C8 = false;
template<> concept C10 = false;
// expected-error@-1{{concept template parameter list must have at least one parameter; explicit specialization of concepts is not allowed}}
template<> concept C7<int> = false;
template<> concept C9<int> = false;
// expected-error@-1{{name defined in concept definition must be an identifier}}
template<typename T> concept N::C9 = false;
template<typename T> concept N::C11 = false;
// expected-error@-1{{name defined in concept definition must be an identifier}}
class A { };
// expected-note@-1{{'A' declared here}}
template<typename T> concept A::C10 = false;
template<typename T> concept A::C12 = false;
// expected-error@-1{{expected namespace name}}
template<typename T> concept operator int = false;
// expected-error@-1{{name defined in concept definition must be an identifier}}
template<bool x> concept C11 = 2; // expected-error {{atomic constraint must be of type 'bool' (found 'int')}}
template<bool x> concept C12 = 2 && x; // expected-error {{atomic constraint must be of type 'bool' (found 'int')}}
template<bool x> concept C13 = x || 2 || x; // expected-error {{atomic constraint must be of type 'bool' (found 'int')}}
template<bool x> concept C14 = 8ull && x || x; // expected-error {{atomic constraint must be of type 'bool' (found 'unsigned long long')}}
template<typename T> concept C15 = sizeof(T); // expected-error {{atomic constraint must be of type 'bool' (found 'unsigned long')}}
template<typename T> concept C16 = true && (0 && 0); // expected-error {{atomic constraint must be of type 'bool' (found 'int')}}
// expected-warning@-1{{use of logical '&&' with constant operand}}
// expected-note@-2{{use '&' for a bitwise operation}}
// expected-note@-3{{remove constant to silence this warning}}
template<typename T> concept C17 = T{};
static_assert(!C17<bool>);
template<typename T> concept C18 = (bool&&)true;
static_assert(C18<int>);
template<typename T> concept C19 = (const bool&)true;
static_assert(C19<int>);
template<typename T> concept C20 = (const bool)true;
static_assert(C20<int>);
template <bool c> concept C21 = integral_constant<bool, c>::value && true;
static_assert(C21<true>);
static_assert(!C21<false>);
template <bool c> concept C22 = integral_constant<bool, c>::value;
static_assert(C22<true>);
static_assert(!C22<false>);
template <bool word> concept C23 = integral_constant<bool, wor>::value;
// expected-error@-1{{use of undeclared identifier 'wor'; did you mean 'word'?}}
// expected-note@-2{{'word' declared here}}

1
clang/tools/libclang/CXCursor.cpp
View File

@ -256,7 +256,6 @@ CXCursor cxcursor::MakeCXCursor(const Stmt *S, const Decl *Parent,
case Stmt::BinaryConditionalOperatorClass:
case Stmt::TypeTraitExprClass:
case Stmt::CoawaitExprClass:
case Stmt::ConceptSpecializationExprClass:
case Stmt::DependentCoawaitExprClass:
case Stmt::CoyieldExprClass:
case Stmt::CXXBindTemporaryExprClass: