[clang] 2a2c228 - Add new 'preferred_name' attribute.
Richard Smith via cfe-commits
cfe-commits at lists.llvm.org
Wed Dec 9 12:23:21 PST 2020
Author: Richard Smith
Date: 2020-12-09T12:22:35-08:00
New Revision: 2a2c228c7ada0a5d77c48b4d445ab0013ca0ae19
URL: https://github.com/llvm/llvm-project/commit/2a2c228c7ada0a5d77c48b4d445ab0013ca0ae19
DIFF: https://github.com/llvm/llvm-project/commit/2a2c228c7ada0a5d77c48b4d445ab0013ca0ae19.diff
LOG: Add new 'preferred_name' attribute.
This attribute permits a typedef to be associated with a class template
specialization as a preferred way of naming that class template
specialization. This permits us to specify that (for example) the
preferred way to express 'std::basic_string<char>' is as 'std::string'.
The attribute is applied to the various class templates in libc++ that have
corresponding well-known typedef names.
This is a re-commit. The previous commit was reverted because it exposed
a pre-existing bug that has since been fixed / worked around; see
PR48434.
Differential Revision: https://reviews.llvm.org/D91311
Added:
clang/test/PCH/decl-attrs.cpp
Modified:
clang/include/clang/Basic/Attr.td
clang/include/clang/Basic/AttrDocs.td
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/lib/AST/TypePrinter.cpp
clang/lib/Sema/SemaDeclAttr.cpp
clang/lib/Sema/SemaTemplate.cpp
clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
clang/test/SemaTemplate/attributes.cpp
clang/utils/TableGen/ClangAttrEmitter.cpp
libcxx/include/__config
libcxx/include/iosfwd
libcxx/include/regex
libcxx/include/string
libcxx/include/string_view
Removed:
################################################################################
diff --git a/clang/include/clang/Basic/Attr.td b/clang/include/clang/Basic/Attr.td
index 52041201d22f..51f654fc7613 100644
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -126,6 +126,9 @@ def FunctionTmpl
FunctionDecl::TK_FunctionTemplate}],
"function templates">;
+def ClassTmpl : SubsetSubject<CXXRecord, [{S->getDescribedClassTemplate()}],
+ "class templates">;
+
// FIXME: this hack is needed because DeclNodes.td defines the base Decl node
// type to be a class, not a definition. This makes it impossible to create an
// attribute subject which accepts a Decl. Normally, this is not a problem,
@@ -2391,6 +2394,16 @@ def Pascal : DeclOrTypeAttr {
let Documentation = [Undocumented];
}
+def PreferredName : InheritableAttr {
+ let Spellings = [Clang<"preferred_name", /*AllowInC*/0>];
+ let Subjects = SubjectList<[ClassTmpl]>;
+ let Args = [TypeArgument<"TypedefType">];
+ let Documentation = [PreferredNameDocs];
+ let InheritEvenIfAlreadyPresent = 1;
+ let MeaningfulToClassTemplateDefinition = 1;
+ let TemplateDependent = 1;
+}
+
def PreserveMost : DeclOrTypeAttr {
let Spellings = [Clang<"preserve_most">];
let Documentation = [PreserveMostDocs];
diff --git a/clang/include/clang/Basic/AttrDocs.td b/clang/include/clang/Basic/AttrDocs.td
index e7e2805a9608..28f35cf2c0c7 100644
--- a/clang/include/clang/Basic/AttrDocs.td
+++ b/clang/include/clang/Basic/AttrDocs.td
@@ -4471,6 +4471,30 @@ the old mangled name and the new code will use the new mangled name with tags.
}];
}
+def PreferredNameDocs : Documentation {
+ let Category = DocCatDecl;
+ let Content = [{
+The ``preferred_name`` attribute can be applied to a class template, and
+specifies a preferred way of naming a specialization of the template. The
+preferred name will be used whenever the corresponding template specialization
+would otherwise be printed in a diagnostic or similar context.
+
+The preferred name must be a typedef or type alias declaration that refers to a
+specialization of the class template (not including any type qualifiers). In
+general this requires the template to be declared at least twice. For example:
+
+.. code-block:: c++
+
+ template<typename T> struct basic_string;
+ using string = basic_string<char>;
+ using wstring = basic_string<wchar_t>;
+ template<typename T> struct [[clang::preferred_name(string),
+ clang::preferred_name(wstring)]] basic_string {
+ // ...
+ };
+ }];
+}
+
def PreserveMostDocs : Documentation {
let Category = DocCatCallingConvs;
let Content = [{
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index 4a5402455301..97773d35a694 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -3941,6 +3941,9 @@ def note_protocol_decl : Note<
"protocol is declared here">;
def note_protocol_decl_undefined : Note<
"protocol %0 has no definition">;
+def err_attribute_preferred_name_arg_invalid : Error<
+ "argument %0 to 'preferred_name' attribute is not a typedef for "
+ "a specialization of %1">;
// objc_designated_initializer attribute diagnostics.
def warn_objc_designated_init_missing_super_call : Warning<
diff --git a/clang/lib/AST/TypePrinter.cpp b/clang/lib/AST/TypePrinter.cpp
index b4a9732b4def..54c451291a07 100644
--- a/clang/lib/AST/TypePrinter.cpp
+++ b/clang/lib/AST/TypePrinter.cpp
@@ -10,8 +10,8 @@
//
//===----------------------------------------------------------------------===//
-#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/ASTContext.h"
+#include "clang/AST/Attr.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
@@ -19,6 +19,7 @@
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Expr.h"
#include "clang/AST/NestedNameSpecifier.h"
+#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/TemplateBase.h"
#include "clang/AST/TemplateName.h"
#include "clang/AST/Type.h"
@@ -1348,6 +1349,14 @@ void TypePrinter::printTag(TagDecl *D, raw_ostream &OS) {
}
void TypePrinter::printRecordBefore(const RecordType *T, raw_ostream &OS) {
+ // Print the preferred name if we have one for this type.
+ for (const auto *PNA : T->getDecl()->specific_attrs<PreferredNameAttr>()) {
+ if (declaresSameEntity(PNA->getTypedefType()->getAsCXXRecordDecl(),
+ T->getDecl()))
+ return printTypeSpec(
+ PNA->getTypedefType()->castAs<TypedefType>()->getDecl(), OS);
+ }
+
printTag(T->getDecl(), OS);
}
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index aa30be20db5a..15094854300d 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -1380,6 +1380,43 @@ static void handlePackedAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
S.Diag(AL.getLoc(), diag::warn_attribute_ignored) << AL;
}
+static void handlePreferredName(Sema &S, Decl *D, const ParsedAttr &AL) {
+ auto *RD = cast<CXXRecordDecl>(D);
+ ClassTemplateDecl *CTD = RD->getDescribedClassTemplate();
+ assert(CTD && "attribute does not appertain to this declaration");
+
+ ParsedType PT = AL.getTypeArg();
+ TypeSourceInfo *TSI = nullptr;
+ QualType T = S.GetTypeFromParser(PT, &TSI);
+ if (!TSI)
+ TSI = S.Context.getTrivialTypeSourceInfo(T, AL.getLoc());
+
+ if (!T.hasQualifiers() && T->getAs<TypedefType>()) {
+ // Find the template name, if this type names a template specialization.
+ const TemplateDecl *Template = nullptr;
+ if (const auto *CTSD = dyn_cast_or_null<ClassTemplateSpecializationDecl>(
+ T->getAsCXXRecordDecl())) {
+ Template = CTSD->getSpecializedTemplate();
+ } else if (const auto *TST = T->getAs<TemplateSpecializationType>()) {
+ while (TST && TST->isTypeAlias())
+ TST = TST->getAliasedType()->getAs<TemplateSpecializationType>();
+ if (TST)
+ Template = TST->getTemplateName().getAsTemplateDecl();
+ }
+
+ if (Template && declaresSameEntity(Template, CTD)) {
+ D->addAttr(::new (S.Context) PreferredNameAttr(S.Context, AL, TSI));
+ return;
+ }
+ }
+
+ S.Diag(AL.getLoc(), diag::err_attribute_preferred_name_arg_invalid)
+ << T << CTD;
+ if (const auto *TT = T->getAs<TypedefType>())
+ S.Diag(TT->getDecl()->getLocation(), diag::note_entity_declared_at)
+ << TT->getDecl();
+}
+
static bool checkIBOutletCommon(Sema &S, Decl *D, const ParsedAttr &AL) {
// The IBOutlet/IBOutletCollection attributes only apply to instance
// variables or properties of Objective-C classes. The outlet must also
@@ -7778,6 +7815,9 @@ static void ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D,
case ParsedAttr::AT_Packed:
handlePackedAttr(S, D, AL);
break;
+ case ParsedAttr::AT_PreferredName:
+ handlePreferredName(S, D, AL);
+ break;
case ParsedAttr::AT_Section:
handleSectionAttr(S, D, AL);
break;
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 03715ef600bc..4176aa1f458f 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -3792,11 +3792,15 @@ QualType Sema::CheckTemplateIdType(TemplateName Name,
Decl->setLexicalDeclContext(ClassTemplate->getLexicalDeclContext());
}
- if (Decl->getSpecializationKind() == TSK_Undeclared) {
- MultiLevelTemplateArgumentList TemplateArgLists;
- TemplateArgLists.addOuterTemplateArguments(Converted);
- InstantiateAttrsForDecl(TemplateArgLists, ClassTemplate->getTemplatedDecl(),
- Decl);
+ if (Decl->getSpecializationKind() == TSK_Undeclared &&
+ ClassTemplate->getTemplatedDecl()->hasAttrs()) {
+ InstantiatingTemplate Inst(*this, TemplateLoc, Decl);
+ if (!Inst.isInvalid()) {
+ MultiLevelTemplateArgumentList TemplateArgLists;
+ TemplateArgLists.addOuterTemplateArguments(Converted);
+ InstantiateAttrsForDecl(TemplateArgLists,
+ ClassTemplate->getTemplatedDecl(), Decl);
+ }
}
// Diagnose uses of this specialization.
diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 6623e86765d1..9db4f23d7296 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -548,12 +548,40 @@ static void instantiateDependentAMDGPUWavesPerEUAttr(
S.addAMDGPUWavesPerEUAttr(New, Attr, MinExpr, MaxExpr);
}
+/// Determine whether the attribute A might be relevent to the declaration D.
+/// If not, we can skip instantiating it. The attribute may or may not have
+/// been instantiated yet.
+static bool isRelevantAttr(Sema &S, const Decl *D, const Attr *A) {
+ // 'preferred_name' is only relevant to the matching specialization of the
+ // template.
+ if (const auto *PNA = dyn_cast<PreferredNameAttr>(A)) {
+ QualType T = PNA->getTypedefType();
+ const auto *RD = cast<CXXRecordDecl>(D);
+ if (!T->isDependentType() && !RD->isDependentContext() &&
+ !declaresSameEntity(T->getAsCXXRecordDecl(), RD))
+ return false;
+ for (const auto *ExistingPNA : D->specific_attrs<PreferredNameAttr>())
+ if (S.Context.hasSameType(ExistingPNA->getTypedefType(),
+ PNA->getTypedefType()))
+ return false;
+ return true;
+ }
+
+ return true;
+}
+
void Sema::InstantiateAttrsForDecl(
const MultiLevelTemplateArgumentList &TemplateArgs, const Decl *Tmpl,
Decl *New, LateInstantiatedAttrVec *LateAttrs,
LocalInstantiationScope *OuterMostScope) {
if (NamedDecl *ND = dyn_cast<NamedDecl>(New)) {
+ // FIXME: This function is called multiple times for the same template
+ // specialization. We should only instantiate attributes that were added
+ // since the previous instantiation.
for (const auto *TmplAttr : Tmpl->attrs()) {
+ if (!isRelevantAttr(*this, New, TmplAttr))
+ continue;
+
// FIXME: If any of the special case versions from InstantiateAttrs become
// applicable to template declaration, we'll need to add them here.
CXXThisScopeRAII ThisScope(
@@ -562,7 +590,7 @@ void Sema::InstantiateAttrsForDecl(
Attr *NewAttr = sema::instantiateTemplateAttributeForDecl(
TmplAttr, Context, *this, TemplateArgs);
- if (NewAttr)
+ if (NewAttr && isRelevantAttr(*this, New, NewAttr))
New->addAttr(NewAttr);
}
}
@@ -587,6 +615,9 @@ void Sema::InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
LateInstantiatedAttrVec *LateAttrs,
LocalInstantiationScope *OuterMostScope) {
for (const auto *TmplAttr : Tmpl->attrs()) {
+ if (!isRelevantAttr(*this, New, TmplAttr))
+ continue;
+
// FIXME: This should be generalized to more than just the AlignedAttr.
const AlignedAttr *Aligned = dyn_cast<AlignedAttr>(TmplAttr);
if (Aligned && Aligned->isAlignmentDependent()) {
@@ -709,7 +740,7 @@ void Sema::InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
Attr *NewAttr = sema::instantiateTemplateAttribute(TmplAttr, Context,
*this, TemplateArgs);
- if (NewAttr)
+ if (NewAttr && isRelevantAttr(*this, New, TmplAttr))
New->addAttr(NewAttr);
}
}
diff --git a/clang/test/PCH/decl-attrs.cpp b/clang/test/PCH/decl-attrs.cpp
new file mode 100644
index 000000000000..c89354d0c5de
--- /dev/null
+++ b/clang/test/PCH/decl-attrs.cpp
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -std=c++20 -emit-pch -o %t.a %s
+// RUN: %clang_cc1 -std=c++20 -include-pch %t.a %s -verify
+
+#ifndef HEADER
+#define HEADER
+
+namespace preferred_name {
+ template<typename T> struct X;
+ using Y = X<int>;
+ using Z = X<float>;
+ template<typename T> struct [[using clang: preferred_name(Y), preferred_name(Z)]] X {};
+ Y y;
+}
+
+#else
+
+namespace preferred_name {
+ Z z;
+
+ template<typename T> T forget(T t) { return t; }
+ void f() {
+ forget(y).foo(); // expected-error {{no member named 'foo' in 'preferred_name::Y'}}
+ forget(z).foo(); // expected-error {{no member named 'foo' in 'preferred_name::Z'}}
+ }
+}
+
+#endif
diff --git a/clang/test/SemaTemplate/attributes.cpp b/clang/test/SemaTemplate/attributes.cpp
index 7a04c4705bf2..3f52412a23ac 100644
--- a/clang/test/SemaTemplate/attributes.cpp
+++ b/clang/test/SemaTemplate/attributes.cpp
@@ -63,3 +63,67 @@ namespace PR9049 {
// CHECK: AnnotateAttr {{.*}} "ANNOTATE_BAR"
template<typename T> [[clang::annotate("ANNOTATE_FOO"), clang::annotate("ANNOTATE_BAR")]] void HasAnnotations();
void UseAnnotations() { HasAnnotations<int>(); }
+
+namespace preferred_name {
+ int x [[clang::preferred_name("frank")]]; // expected-error {{expected a type}}
+ int y [[clang::preferred_name(int)]]; // expected-warning {{'preferred_name' attribute only applies to class templates}}
+ struct [[clang::preferred_name(int)]] A; // expected-warning {{'preferred_name' attribute only applies to class templates}}
+ template<typename T> struct [[clang::preferred_name(int)]] B; // expected-error {{argument 'int' to 'preferred_name' attribute is not a typedef for a specialization of 'B'}}
+ template<typename T> struct C;
+ using X = C<int>; // expected-note {{'X' declared here}}
+ typedef C<float> Y;
+ using Z = const C<double>; // expected-note {{'Z' declared here}}
+ template<typename T> struct [[clang::preferred_name(C<int>)]] C; // expected-error {{argument 'C<int>' to 'preferred_name' attribute is not a typedef for a specialization of 'C'}}
+ template<typename T> struct [[clang::preferred_name(X), clang::preferred_name(Y)]] C;
+ template<typename T> struct [[clang::preferred_name(const X)]] C; // expected-error {{argument 'const preferred_name::X'}}
+ template<typename T> struct [[clang::preferred_name(Z)]] C; // expected-error {{argument 'preferred_name::Z' (aka 'const C<double>')}}
+ template<typename T> struct C {};
+
+ // CHECK: ClassTemplateDecl {{.*}} <line:[[@LINE-10]]:{{.*}} C
+ // CHECK: ClassTemplateSpecializationDecl {{.*}} struct C definition
+ // CHECK: TemplateArgument type 'int'
+ // CHECK-NOT: PreferredNameAttr
+ // CHECK: PreferredNameAttr {{.*}} preferred_name::X
+ // CHECK-NOT: PreferredNameAttr
+ // CHECK: CXXRecordDecl
+ // CHECK: ClassTemplateSpecializationDecl {{.*}} struct C definition
+ // CHECK: TemplateArgument type 'float'
+ // CHECK-NOT: PreferredNameAttr
+ // CHECK: PreferredNameAttr {{.*}} preferred_name::Y
+ // CHECK-NOT: PreferredNameAttr
+ // CHECK: CXXRecordDecl
+ // CHECK: ClassTemplateSpecializationDecl {{.*}} struct C definition
+ // CHECK: TemplateArgument type 'double'
+ // CHECK-NOT: PreferredNameAttr
+ // CHECK: CXXRecordDecl
+
+ // Check this doesn't cause us to instantiate the same attribute multiple times.
+ C<float> *cf1;
+ C<float> *cf2;
+
+ void f(C<int> a, C<float> b, C<double> c) {
+ auto p = a;
+ auto q = b;
+ auto r = c;
+ p.f(); // expected-error {{no member named 'f' in 'preferred_name::X'}}
+ q.f(); // expected-error {{no member named 'f' in 'preferred_name::Y'}}
+ r.f(); // expected-error {{no member named 'f' in 'preferred_name::C<double>'}}
+ }
+
+ template<typename T> struct D;
+ using DInt = D<int>;
+ template<typename T> struct __attribute__((__preferred_name__(DInt))) D {};
+ template struct D<int>;
+ int use_dint = D<int>().get(); // expected-error {{no member named 'get' in 'preferred_name::DInt'}}
+
+ template<typename T> struct MemberTemplate {
+ template<typename U> struct Iter;
+ using iterator = Iter<T>;
+ using const_iterator = Iter<const T>;
+ template<typename U>
+ struct [[clang::preferred_name(iterator),
+ clang::preferred_name(const_iterator)]] Iter {};
+ };
+ auto it = MemberTemplate<int>::Iter<const int>();
+ int n = it; // expected-error {{no viable conversion from 'preferred_name::MemberTemplate<int>::const_iterator' to 'int'}}
+}
diff --git a/clang/utils/TableGen/ClangAttrEmitter.cpp b/clang/utils/TableGen/ClangAttrEmitter.cpp
index ec109e134e20..ec436df15e65 100644
--- a/clang/utils/TableGen/ClangAttrEmitter.cpp
+++ b/clang/utils/TableGen/ClangAttrEmitter.cpp
@@ -1149,8 +1149,9 @@ namespace {
<< "Unevaluated(S, Sema::ExpressionEvaluationContext::Unevaluated);\n";
OS << " ExprResult " << "Result = S.SubstExpr("
<< "A->get" << getUpperName() << "(), TemplateArgs);\n";
- OS << " tempInst" << getUpperName() << " = "
- << "Result.getAs<Expr>();\n";
+ OS << " if (Result.isInvalid())\n";
+ OS << " return nullptr;\n";
+ OS << " tempInst" << getUpperName() << " = Result.get();\n";
OS << " }\n";
}
@@ -1202,7 +1203,9 @@ namespace {
<< "_end();\n";
OS << " for (; I != E; ++I, ++TI) {\n";
OS << " ExprResult Result = S.SubstExpr(*I, TemplateArgs);\n";
- OS << " *TI = Result.getAs<Expr>();\n";
+ OS << " if (Result.isInvalid())\n";
+ OS << " return nullptr;\n";
+ OS << " *TI = Result.get();\n";
OS << " }\n";
OS << " }\n";
}
@@ -1273,8 +1276,16 @@ namespace {
OS << " return false;\n";
}
+ void writeTemplateInstantiation(raw_ostream &OS) const override {
+ OS << " " << getType() << " tempInst" << getUpperName() << " =\n";
+ OS << " S.SubstType(A->get" << getUpperName() << "Loc(), "
+ << "TemplateArgs, A->getLoc(), A->getAttrName());\n";
+ OS << " if (!tempInst" << getUpperName() << ")\n";
+ OS << " return nullptr;\n";
+ }
+
void writeTemplateInstantiationArgs(raw_ostream &OS) const override {
- OS << "A->get" << getUpperName() << "Loc()";
+ OS << "tempInst" << getUpperName();
}
void writePCHWrite(raw_ostream &OS) const override {
@@ -3319,12 +3330,13 @@ void EmitClangAttrTemplateInstantiateHelper(const std::vector<Record *> &Attrs,
for (auto const &ai : Args)
ai->writeTemplateInstantiation(OS);
- OS << " return new (C) " << R.getName() << "Attr(C, *A";
+ OS << " return new (C) " << R.getName() << "Attr(C, *A";
for (auto const &ai : Args) {
OS << ", ";
ai->writeTemplateInstantiationArgs(OS);
}
- OS << ");\n }\n";
+ OS << ");\n"
+ << " }\n";
}
OS << " } // end switch\n"
<< " llvm_unreachable(\"Unknown attribute!\");\n"
diff --git a/libcxx/include/__config b/libcxx/include/__config
index d2fdf6785c7e..033cd8aea068 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -1318,6 +1318,12 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
#endif
#endif // !defined(_LIBCPP_NODEBUG_TYPE)
+#if __has_attribute(__preferred_name__)
+#define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x)))
+#else
+#define _LIBCPP_PREFERRED_NAME(x)
+#endif
+
#if defined(_LIBCPP_ABI_MICROSOFT) && \
(defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases))
# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
diff --git a/libcxx/include/iosfwd b/libcxx/include/iosfwd
index 070fbe8bfad8..0a0de99ff3a7 100644
--- a/libcxx/include/iosfwd
+++ b/libcxx/include/iosfwd
@@ -185,6 +185,36 @@ typedef basic_ifstream<wchar_t> wifstream;
typedef basic_ofstream<wchar_t> wofstream;
typedef basic_fstream<wchar_t> wfstream;
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(ios) _LIBCPP_PREFERRED_NAME(wios) basic_ios;
+
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(streambuf) _LIBCPP_PREFERRED_NAME(wstreambuf) basic_streambuf;
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(istream) _LIBCPP_PREFERRED_NAME(wistream) basic_istream;
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(ostream) _LIBCPP_PREFERRED_NAME(wostream) basic_ostream;
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(iostream) _LIBCPP_PREFERRED_NAME(wiostream) basic_iostream;
+
+template <class _CharT, class _Traits, class _Allocator>
+ class _LIBCPP_PREFERRED_NAME(stringbuf) _LIBCPP_PREFERRED_NAME(wstringbuf) basic_stringbuf;
+template <class _CharT, class _Traits, class _Allocator>
+ class _LIBCPP_PREFERRED_NAME(istringstream) _LIBCPP_PREFERRED_NAME(wistringstream) basic_istringstream;
+template <class _CharT, class _Traits, class _Allocator>
+ class _LIBCPP_PREFERRED_NAME(ostringstream) _LIBCPP_PREFERRED_NAME(wostringstream) basic_ostringstream;
+template <class _CharT, class _Traits, class _Allocator>
+ class _LIBCPP_PREFERRED_NAME(stringstream) _LIBCPP_PREFERRED_NAME(wstringstream) basic_stringstream;
+
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(filebuf) _LIBCPP_PREFERRED_NAME(wfilebuf) basic_filebuf;
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(ifstream) _LIBCPP_PREFERRED_NAME(wifstream) basic_ifstream;
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(ofstream) _LIBCPP_PREFERRED_NAME(wofstream) basic_ofstream;
+template <class _CharT, class _Traits>
+ class _LIBCPP_PREFERRED_NAME(fstream) _LIBCPP_PREFERRED_NAME(wfstream) basic_fstream;
+
template <class _State> class _LIBCPP_TEMPLATE_VIS fpos;
typedef fpos<mbstate_t> streampos;
typedef fpos<mbstate_t> wstreampos;
@@ -210,6 +240,8 @@ template <class _CharT, // for <stdexcept>
typedef basic_string<char, char_traits<char>, allocator<char> > string;
typedef basic_string<wchar_t, char_traits<wchar_t>, allocator<wchar_t> > wstring;
+template <class _CharT, class _Traits, class _Allocator>
+ class _LIBCPP_PREFERRED_NAME(string) _LIBCPP_PREFERRED_NAME(wstring) basic_string;
// Include other forward declarations here
template <class _Tp, class _Alloc = allocator<_Tp> >
diff --git a/libcxx/include/regex b/libcxx/include/regex
index 7c5b2fd61b93..8578039bf6a2 100644
--- a/libcxx/include/regex
+++ b/libcxx/include/regex
@@ -2534,7 +2534,17 @@ __exit:
template <class _CharT, class _Traits> class __lookahead;
template <class _CharT, class _Traits = regex_traits<_CharT> >
-class _LIBCPP_TEMPLATE_VIS basic_regex
+ class _LIBCPP_TEMPLATE_VIS basic_regex;
+
+typedef basic_regex<char> regex;
+typedef basic_regex<wchar_t> wregex;
+
+template <class _CharT, class _Traits>
+class
+ _LIBCPP_TEMPLATE_VIS
+ _LIBCPP_PREFERRED_NAME(regex)
+ _LIBCPP_PREFERRED_NAME(wregex)
+ basic_regex
{
public:
// types:
@@ -4879,13 +4889,21 @@ basic_regex<_CharT, _Traits>::__push_lookahead(const basic_regex& __exp,
__end_ = static_cast<__owns_one_state<_CharT>*>(__end_->first());
}
-typedef basic_regex<char> regex;
-typedef basic_regex<wchar_t> wregex;
-
// sub_match
+typedef sub_match<const char*> csub_match;
+typedef sub_match<const wchar_t*> wcsub_match;
+typedef sub_match<string::const_iterator> ssub_match;
+typedef sub_match<wstring::const_iterator> wssub_match;
+
template <class _BidirectionalIterator>
-class _LIBCPP_TEMPLATE_VIS sub_match
+class
+ _LIBCPP_TEMPLATE_VIS
+ _LIBCPP_PREFERRED_NAME(csub_match)
+ _LIBCPP_PREFERRED_NAME(wcsub_match)
+ _LIBCPP_PREFERRED_NAME(ssub_match)
+ _LIBCPP_PREFERRED_NAME(wssub_match)
+ sub_match
: public pair<_BidirectionalIterator, _BidirectionalIterator>
{
public:
@@ -4920,11 +4938,6 @@ public:
{return str().compare(__s);}
};
-typedef sub_match<const char*> csub_match;
-typedef sub_match<const wchar_t*> wcsub_match;
-typedef sub_match<string::const_iterator> ssub_match;
-typedef sub_match<wstring::const_iterator> wssub_match;
-
template <class _BiIter>
inline _LIBCPP_INLINE_VISIBILITY
bool
@@ -5307,8 +5320,19 @@ operator<<(basic_ostream<_CharT, _ST>& __os, const sub_match<_BiIter>& __m)
return __os << __m.str();
}
+typedef match_results<const char*> cmatch;
+typedef match_results<const wchar_t*> wcmatch;
+typedef match_results<string::const_iterator> smatch;
+typedef match_results<wstring::const_iterator> wsmatch;
+
template <class _BidirectionalIterator, class _Allocator>
-class _LIBCPP_TEMPLATE_VIS match_results
+class
+ _LIBCPP_TEMPLATE_VIS
+ _LIBCPP_PREFERRED_NAME(cmatch)
+ _LIBCPP_PREFERRED_NAME(wcmatch)
+ _LIBCPP_PREFERRED_NAME(smatch)
+ _LIBCPP_PREFERRED_NAME(wsmatch)
+ match_results
{
public:
typedef _Allocator allocator_type;
@@ -5628,11 +5652,6 @@ match_results<_BidirectionalIterator, _Allocator>::swap(match_results& __m)
swap(__ready_, __m.__ready_);
}
-typedef match_results<const char*> cmatch;
-typedef match_results<const wchar_t*> wcmatch;
-typedef match_results<string::const_iterator> smatch;
-typedef match_results<wstring::const_iterator> wsmatch;
-
template <class _BidirectionalIterator, class _Allocator>
bool
operator==(const match_results<_BidirectionalIterator, _Allocator>& __x,
@@ -6216,7 +6235,21 @@ regex_match(const basic_string<_CharT, _ST, _SA>& __s,
template <class _BidirectionalIterator,
class _CharT = typename iterator_traits<_BidirectionalIterator>::value_type,
class _Traits = regex_traits<_CharT> >
-class _LIBCPP_TEMPLATE_VIS regex_iterator
+ class _LIBCPP_TEMPLATE_VIS regex_iterator;
+
+typedef regex_iterator<const char*> cregex_iterator;
+typedef regex_iterator<const wchar_t*> wcregex_iterator;
+typedef regex_iterator<string::const_iterator> sregex_iterator;
+typedef regex_iterator<wstring::const_iterator> wsregex_iterator;
+
+template <class _BidirectionalIterator, class _CharT, class _Traits>
+class
+ _LIBCPP_TEMPLATE_VIS
+ _LIBCPP_PREFERRED_NAME(cregex_iterator)
+ _LIBCPP_PREFERRED_NAME(wcregex_iterator)
+ _LIBCPP_PREFERRED_NAME(sregex_iterator)
+ _LIBCPP_PREFERRED_NAME(wsregex_iterator)
+ regex_iterator
{
public:
typedef basic_regex<_CharT, _Traits> regex_type;
@@ -6325,17 +6358,26 @@ regex_iterator<_BidirectionalIterator, _CharT, _Traits>::operator++()
return *this;
}
-typedef regex_iterator<const char*> cregex_iterator;
-typedef regex_iterator<const wchar_t*> wcregex_iterator;
-typedef regex_iterator<string::const_iterator> sregex_iterator;
-typedef regex_iterator<wstring::const_iterator> wsregex_iterator;
-
// regex_token_iterator
template <class _BidirectionalIterator,
class _CharT = typename iterator_traits<_BidirectionalIterator>::value_type,
class _Traits = regex_traits<_CharT> >
-class _LIBCPP_TEMPLATE_VIS regex_token_iterator
+ class _LIBCPP_TEMPLATE_VIS regex_token_iterator;
+
+typedef regex_token_iterator<const char*> cregex_token_iterator;
+typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator;
+typedef regex_token_iterator<string::const_iterator> sregex_token_iterator;
+typedef regex_token_iterator<wstring::const_iterator> wsregex_token_iterator;
+
+template <class _BidirectionalIterator, class _CharT, class _Traits>
+class
+ _LIBCPP_TEMPLATE_VIS
+ _LIBCPP_PREFERRED_NAME(cregex_token_iterator)
+ _LIBCPP_PREFERRED_NAME(wcregex_token_iterator)
+ _LIBCPP_PREFERRED_NAME(sregex_token_iterator)
+ _LIBCPP_PREFERRED_NAME(wsregex_token_iterator)
+ regex_token_iterator
{
public:
typedef basic_regex<_CharT, _Traits> regex_type;
@@ -6613,11 +6655,6 @@ regex_token_iterator<_BidirectionalIterator, _CharT, _Traits>::operator++()
return *this;
}
-typedef regex_token_iterator<const char*> cregex_token_iterator;
-typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator;
-typedef regex_token_iterator<string::const_iterator> sregex_token_iterator;
-typedef regex_token_iterator<wstring::const_iterator> wsregex_token_iterator;
-
// regex_replace
template <class _OutputIterator, class _BidirectionalIterator,
diff --git a/libcxx/include/string b/libcxx/include/string
index 1f3f444727fd..b54fe2a93abd 100644
--- a/libcxx/include/string
+++ b/libcxx/include/string
@@ -666,8 +666,26 @@ struct __padding<_CharT, 1>
#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
+#ifndef _LIBCPP_NO_HAS_CHAR8_T
+typedef basic_string<char8_t> u8string;
+#endif
+
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+typedef basic_string<char16_t> u16string;
+typedef basic_string<char32_t> u32string;
+#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
+
template<class _CharT, class _Traits, class _Allocator>
-class _LIBCPP_TEMPLATE_VIS basic_string
+class
+ _LIBCPP_TEMPLATE_VIS
+#ifndef _LIBCPP_NO_HAS_CHAR8_T
+ _LIBCPP_PREFERRED_NAME(u8string)
+#endif
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+ _LIBCPP_PREFERRED_NAME(u16string)
+ _LIBCPP_PREFERRED_NAME(u32string)
+#endif
+ basic_string
: private __basic_string_common<true>
{
public:
@@ -4327,15 +4345,6 @@ swap(basic_string<_CharT, _Traits, _Allocator>& __lhs,
__lhs.swap(__rhs);
}
-#ifndef _LIBCPP_NO_HAS_CHAR8_T
-typedef basic_string<char8_t> u8string;
-#endif
-
-#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
-typedef basic_string<char16_t> u16string;
-typedef basic_string<char32_t> u32string;
-#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
-
_LIBCPP_FUNC_VIS int stoi (const string& __str, size_t* __idx = nullptr, int __base = 10);
_LIBCPP_FUNC_VIS long stol (const string& __str, size_t* __idx = nullptr, int __base = 10);
_LIBCPP_FUNC_VIS unsigned long stoul (const string& __str, size_t* __idx = nullptr, int __base = 10);
diff --git a/libcxx/include/string_view b/libcxx/include/string_view
index 7c3214fb2c2e..44ffb02c432d 100644
--- a/libcxx/include/string_view
+++ b/libcxx/include/string_view
@@ -192,7 +192,26 @@ _LIBCPP_PUSH_MACROS
_LIBCPP_BEGIN_NAMESPACE_STD
template<class _CharT, class _Traits = char_traits<_CharT> >
-class _LIBCPP_TEMPLATE_VIS basic_string_view {
+ class _LIBCPP_TEMPLATE_VIS basic_string_view;
+
+typedef basic_string_view<char> string_view;
+#ifndef _LIBCPP_NO_HAS_CHAR8_T
+typedef basic_string_view<char8_t> u8string_view;
+#endif
+typedef basic_string_view<char16_t> u16string_view;
+typedef basic_string_view<char32_t> u32string_view;
+typedef basic_string_view<wchar_t> wstring_view;
+
+template<class _CharT, class _Traits>
+class
+ _LIBCPP_PREFERRED_NAME(string_view)
+#ifndef _LIBCPP_NO_HAS_CHAR8_T
+ _LIBCPP_PREFERRED_NAME(u8string_view)
+#endif
+ _LIBCPP_PREFERRED_NAME(u16string_view)
+ _LIBCPP_PREFERRED_NAME(u32string_view)
+ _LIBCPP_PREFERRED_NAME(wstring_view)
+ basic_string_view {
public:
// types
typedef _Traits traits_type;
@@ -776,14 +795,6 @@ basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __os,
basic_string_view<_CharT, _Traits> __str);
-typedef basic_string_view<char> string_view;
-#ifndef _LIBCPP_NO_HAS_CHAR8_T
-typedef basic_string_view<char8_t> u8string_view;
-#endif
-typedef basic_string_view<char16_t> u16string_view;
-typedef basic_string_view<char32_t> u32string_view;
-typedef basic_string_view<wchar_t> wstring_view;
-
// [string.view.hash]
template<class _CharT>
struct _LIBCPP_TEMPLATE_VIS hash<basic_string_view<_CharT, char_traits<_CharT> > >
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