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Implement LWG#2101 'Some transformation types can produce impossible types' Introduced a new (internal) type trait '__is_referenceable' with tests. Use that trait in add_lvalue_reference, add_rvalue_reference and add_pointer.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@258418 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2016-01-21 18:22:43 +00:00
parent cd17b3b156
commit 7a7960ff7f
8 changed files with 320 additions and 27 deletions
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153
test/libcxx/utilities/meta/is_referenceable.pass.cpp Normal file
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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// __is_referenceable<Tp>
//
// [defns.referenceable] defines "a referenceable type" as:
// An object type, a function type that does not have cv-qualifiers
// or a ref-qualifier, or a reference type.
//
#include <type_traits>
#include <cassert>
#include "test_macros.h"
struct Foo {};
static_assert((!std::__is_referenceable<void>::value), "");
static_assert(( std::__is_referenceable<int>::value), "");
static_assert(( std::__is_referenceable<int[3]>::value), "");
static_assert(( std::__is_referenceable<int &>::value), "");
static_assert(( std::__is_referenceable<const int &>::value), "");
static_assert(( std::__is_referenceable<int *>::value), "");
static_assert(( std::__is_referenceable<const int *>::value), "");
static_assert(( std::__is_referenceable<Foo>::value), "");
static_assert(( std::__is_referenceable<const Foo>::value), "");
static_assert(( std::__is_referenceable<Foo &>::value), "");
static_assert(( std::__is_referenceable<const Foo &>::value), "");
static_assert(( std::__is_referenceable<Foo &&>::value), "");
static_assert(( std::__is_referenceable<const Foo &&>::value), "");
// Functions without cv-qualifiers are referenceable
static_assert(( std::__is_referenceable<void ()>::value), "");
static_assert((!std::__is_referenceable<void () const>::value), "");
static_assert((!std::__is_referenceable<void () &>::value), "");
static_assert((!std::__is_referenceable<void () &&>::value), "");
static_assert((!std::__is_referenceable<void () const &>::value), "");
static_assert((!std::__is_referenceable<void () const &&>::value), "");
static_assert(( std::__is_referenceable<void (int)>::value), "");
static_assert((!std::__is_referenceable<void (int) const>::value), "");
static_assert((!std::__is_referenceable<void (int) &>::value), "");
static_assert((!std::__is_referenceable<void (int) &&>::value), "");
static_assert((!std::__is_referenceable<void (int) const &>::value), "");
static_assert((!std::__is_referenceable<void (int) const &&>::value), "");
static_assert(( std::__is_referenceable<void (int, float)>::value), "");
static_assert((!std::__is_referenceable<void (int, float) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float) const &&>::value), "");
static_assert(( std::__is_referenceable<void (int, float, Foo &)>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) const &&>::value), "");
static_assert(( std::__is_referenceable<void (...)>::value), "");
static_assert((!std::__is_referenceable<void (...) const>::value), "");
static_assert((!std::__is_referenceable<void (...) &>::value), "");
static_assert((!std::__is_referenceable<void (...) &&>::value), "");
static_assert((!std::__is_referenceable<void (...) const &>::value), "");
static_assert((!std::__is_referenceable<void (...) const &&>::value), "");
static_assert(( std::__is_referenceable<void (int, ...)>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) const>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) &>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) const &&>::value), "");
static_assert(( std::__is_referenceable<void (int, float, ...)>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) const &&>::value), "");
static_assert(( std::__is_referenceable<void (int, float, Foo &, ...)>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) const &&>::value), "");
// member functions with or without cv-qualifiers are referenceable
static_assert(( std::__is_referenceable<void (Foo::*)()>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() const &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) const &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) const &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) const &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) const &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) const &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) const &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) const>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) const &&>::value), "");
int main () {}