Implement a new type trait __is_trivially_constructible(T, Args...)
that provides the behavior of the C++11 library trait
std::is_trivially_constructible<T, Args...>, which can't be
implemented purely as a library.
Since __is_trivially_constructible can have zero or more arguments, I
needed to add Yet Another Type Trait Expression Class, this one
handling arbitrary arguments. The next step will be to migrate
UnaryTypeTrait and BinaryTypeTrait over to this new, more general
TypeTrait class.
Fixes the Clang side of <rdar://problem/10895483> / PR12038.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151352 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index a1770c9..37df904 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -2169,6 +2169,7 @@
case AddrLabelExprClass:
case ArrayTypeTraitExprClass:
case BinaryTypeTraitExprClass:
+ case TypeTraitExprClass:
case CXXBoolLiteralExprClass:
case CXXNoexceptExprClass:
case CXXNullPtrLiteralExprClass:
diff --git a/lib/AST/ExprCXX.cpp b/lib/AST/ExprCXX.cpp
index 7ef3417..da89bf2 100644
--- a/lib/AST/ExprCXX.cpp
+++ b/lib/AST/ExprCXX.cpp
@@ -199,7 +199,6 @@
return SourceRange(Base->getLocStart(), End);
}
-
// UnresolvedLookupExpr
UnresolvedLookupExpr *
UnresolvedLookupExpr::Create(ASTContext &C,
@@ -1262,4 +1261,51 @@
return TemplateArgument(Arguments, NumArguments);
}
+TypeTraitExpr::TypeTraitExpr(QualType T, SourceLocation Loc, TypeTrait Kind,
+ ArrayRef<TypeSourceInfo *> Args,
+ SourceLocation RParenLoc,
+ bool Value)
+ : Expr(TypeTraitExprClass, T, VK_RValue, OK_Ordinary,
+ /*TypeDependent=*/false,
+ /*ValueDependent=*/false,
+ /*InstantiationDependent=*/false,
+ /*ContainsUnexpandedParameterPack=*/false),
+ Loc(Loc), RParenLoc(RParenLoc)
+{
+ TypeTraitExprBits.Kind = Kind;
+ TypeTraitExprBits.Value = Value;
+ TypeTraitExprBits.NumArgs = Args.size();
+
+ TypeSourceInfo **ToArgs = getTypeSourceInfos();
+
+ for (unsigned I = 0, N = Args.size(); I != N; ++I) {
+ if (Args[I]->getType()->isDependentType())
+ setValueDependent(true);
+ if (Args[I]->getType()->isInstantiationDependentType())
+ setInstantiationDependent(true);
+ if (Args[I]->getType()->containsUnexpandedParameterPack())
+ setContainsUnexpandedParameterPack(true);
+
+ ToArgs[I] = Args[I];
+ }
+}
+
+TypeTraitExpr *TypeTraitExpr::Create(ASTContext &C, QualType T,
+ SourceLocation Loc,
+ TypeTrait Kind,
+ ArrayRef<TypeSourceInfo *> Args,
+ SourceLocation RParenLoc,
+ bool Value) {
+ unsigned Size = sizeof(TypeTraitExpr) + sizeof(TypeSourceInfo*) * Args.size();
+ void *Mem = C.Allocate(Size);
+ return new (Mem) TypeTraitExpr(T, Loc, Kind, Args, RParenLoc, Value);
+}
+
+TypeTraitExpr *TypeTraitExpr::CreateDeserialized(ASTContext &C,
+ unsigned NumArgs) {
+ unsigned Size = sizeof(TypeTraitExpr) + sizeof(TypeSourceInfo*) * NumArgs;
+ void *Mem = C.Allocate(Size);
+ return new (Mem) TypeTraitExpr(EmptyShell());
+}
+
void ArrayTypeTraitExpr::anchor() { }
diff --git a/lib/AST/ExprClassification.cpp b/lib/AST/ExprClassification.cpp
index 79d8dc4..1b04428 100644
--- a/lib/AST/ExprClassification.cpp
+++ b/lib/AST/ExprClassification.cpp
@@ -151,6 +151,7 @@
case Expr::CXXScalarValueInitExprClass:
case Expr::UnaryTypeTraitExprClass:
case Expr::BinaryTypeTraitExprClass:
+ case Expr::TypeTraitExprClass:
case Expr::ArrayTypeTraitExprClass:
case Expr::ExpressionTraitExprClass:
case Expr::ObjCSelectorExprClass:
diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index ed64153..85aa5ee 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -4119,6 +4119,10 @@
return Success(E->getValue(), E);
}
+ bool VisitTypeTraitExpr(const TypeTraitExpr *E) {
+ return Success(E->getValue(), E);
+ }
+
bool VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) {
return Success(E->getValue(), E);
}
@@ -6360,6 +6364,7 @@
case Expr::CXXScalarValueInitExprClass:
case Expr::UnaryTypeTraitExprClass:
case Expr::BinaryTypeTraitExprClass:
+ case Expr::TypeTraitExprClass:
case Expr::ArrayTypeTraitExprClass:
case Expr::ExpressionTraitExprClass:
case Expr::CXXNoexceptExprClass:
diff --git a/lib/AST/ItaniumMangle.cpp b/lib/AST/ItaniumMangle.cpp
index 5e167f5..91e6ee5 100644
--- a/lib/AST/ItaniumMangle.cpp
+++ b/lib/AST/ItaniumMangle.cpp
@@ -2383,6 +2383,7 @@
case Expr::StmtExprClass:
case Expr::UnaryTypeTraitExprClass:
case Expr::BinaryTypeTraitExprClass:
+ case Expr::TypeTraitExprClass:
case Expr::ArrayTypeTraitExprClass:
case Expr::ExpressionTraitExprClass:
case Expr::VAArgExprClass:
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index 51296ad..6d3e783 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -1555,6 +1555,13 @@
llvm_unreachable("Binary type trait not covered by switch");
}
+static const char *getTypeTraitName(TypeTrait TT) {
+ switch (TT) {
+ case clang::TT_IsTriviallyConstructible:return "__is_trivially_constructible";
+ }
+ llvm_unreachable("Type trait not covered by switch");
+}
+
static const char *getTypeTraitName(ArrayTypeTrait ATT) {
switch (ATT) {
case ATT_ArrayRank: return "__array_rank";
@@ -1582,6 +1589,16 @@
<< E->getRhsType().getAsString(Policy) << ")";
}
+void StmtPrinter::VisitTypeTraitExpr(TypeTraitExpr *E) {
+ OS << getTypeTraitName(E->getTrait()) << "(";
+ for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I) {
+ if (I > 0)
+ OS << ", ";
+ OS << E->getArg(I)->getType().getAsString(Policy);
+ }
+ OS << ")";
+}
+
void StmtPrinter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
OS << getTypeTraitName(E->getTrait()) << "("
<< E->getQueriedType().getAsString(Policy) << ")";
diff --git a/lib/AST/StmtProfile.cpp b/lib/AST/StmtProfile.cpp
index fdd0c85..643bca8 100644
--- a/lib/AST/StmtProfile.cpp
+++ b/lib/AST/StmtProfile.cpp
@@ -868,6 +868,14 @@
VisitType(S->getRhsType());
}
+void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
+ VisitExpr(S);
+ ID.AddInteger(S->getTrait());
+ ID.AddInteger(S->getNumArgs());
+ for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
+ VisitType(S->getArg(I)->getType());
+}
+
void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
VisitExpr(S);
ID.AddInteger(S->getTrait());