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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.
//
//===----------------------------------------------------------------------===//
// type_traits
// is_convertible
#include <type_traits>
#include "test_macros.h"
template <class T, class U>
void test_is_convertible()
{
static_assert((std::is_convertible<T, U>::value), "");
static_assert((std::is_convertible<const T, U>::value), "");
static_assert((std::is_convertible<T, const U>::value), "");
static_assert((std::is_convertible<const T, const U>::value), "");
#if TEST_STD_VER > 14
static_assert((std::is_convertible_v<T, U>), "");
static_assert((std::is_convertible_v<const T, U>), "");
static_assert((std::is_convertible_v<T, const U>), "");
static_assert((std::is_convertible_v<const T, const U>), "");
#endif
}
template <class T, class U>
void test_is_not_convertible()
{
static_assert((!std::is_convertible<T, U>::value), "");
static_assert((!std::is_convertible<const T, U>::value), "");
static_assert((!std::is_convertible<T, const U>::value), "");
static_assert((!std::is_convertible<const T, const U>::value), "");
#if TEST_STD_VER > 14
static_assert((!std::is_convertible_v<T, U>), "");
static_assert((!std::is_convertible_v<const T, U>), "");
static_assert((!std::is_convertible_v<T, const U>), "");
static_assert((!std::is_convertible_v<const T, const U>), "");
#endif
}
typedef void Function();
typedef char Array[1];
class NonCopyable {
NonCopyable(NonCopyable&);
};
template <typename T>
class CannotInstantiate {
enum { X = T::ThisExpressionWillBlowUp };
};
int main()
{
// void
test_is_convertible<void,void> ();
test_is_not_convertible<void,Function> ();
test_is_not_convertible<void,Function&> ();
test_is_not_convertible<void,Function*> ();
test_is_not_convertible<void,Array> ();
test_is_not_convertible<void,Array&> ();
test_is_not_convertible<void,char> ();
test_is_not_convertible<void,char&> ();
test_is_not_convertible<void,char*> ();
// Function
test_is_not_convertible<Function, void> ();
test_is_not_convertible<Function, Function> ();
test_is_convertible<Function, Function&> ();
test_is_convertible<Function, Function*> ();
test_is_not_convertible<Function, Array> ();
test_is_not_convertible<Function, Array&> ();
test_is_not_convertible<Function, char> ();
test_is_not_convertible<Function, char&> ();
test_is_not_convertible<Function, char*> ();
// Function&
test_is_not_convertible<Function&, void> ();
test_is_not_convertible<Function&, Function> ();
test_is_convertible<Function&, Function&> ();
test_is_convertible<Function&, Function*> ();
test_is_not_convertible<Function&, Array> ();
test_is_not_convertible<Function&, Array&> ();
test_is_not_convertible<Function&, char> ();
test_is_not_convertible<Function&, char&> ();
test_is_not_convertible<Function&, char*> ();
// Function*
test_is_not_convertible<Function*, void> ();
test_is_not_convertible<Function*, Function> ();
test_is_not_convertible<Function*, Function&> ();
test_is_convertible<Function*, Function*> ();
test_is_not_convertible<Function*, Array> ();
test_is_not_convertible<Function*, Array&> ();
test_is_not_convertible<Function*, char> ();
test_is_not_convertible<Function*, char&> ();
test_is_not_convertible<Function*, char*> ();
// Array
test_is_not_convertible<Array, void> ();
test_is_not_convertible<Array, Function> ();
test_is_not_convertible<Array, Function&> ();
test_is_not_convertible<Array, Function*> ();
test_is_not_convertible<Array, Array> ();
static_assert((!std::is_convertible<Array, Array&>::value), "");
static_assert(( std::is_convertible<Array, const Array&>::value), "");
static_assert((!std::is_convertible<const Array, Array&>::value), "");
static_assert(( std::is_convertible<const Array, const Array&>::value), "");
test_is_not_convertible<Array, char> ();
test_is_not_convertible<Array, char&> ();
static_assert(( std::is_convertible<Array, char*>::value), "");
static_assert(( std::is_convertible<Array, const char*>::value), "");
static_assert((!std::is_convertible<const Array, char*>::value), "");
static_assert(( std::is_convertible<const Array, const char*>::value), "");
// Array&
test_is_not_convertible<Array&, void> ();
test_is_not_convertible<Array&, Function> ();
test_is_not_convertible<Array&, Function&> ();
test_is_not_convertible<Array&, Function*> ();
test_is_not_convertible<Array&, Array> ();
static_assert(( std::is_convertible<Array&, Array&>::value), "");
static_assert(( std::is_convertible<Array&, const Array&>::value), "");
static_assert((!std::is_convertible<const Array&, Array&>::value), "");
static_assert(( std::is_convertible<const Array&, const Array&>::value), "");
test_is_not_convertible<Array&, char> ();
test_is_not_convertible<Array&, char&> ();
static_assert(( std::is_convertible<Array&, char*>::value), "");
static_assert(( std::is_convertible<Array&, const char*>::value), "");
static_assert((!std::is_convertible<const Array&, char*>::value), "");
static_assert(( std::is_convertible<const Array&, const char*>::value), "");
// char
test_is_not_convertible<char, void> ();
test_is_not_convertible<char, Function> ();
test_is_not_convertible<char, Function&> ();
test_is_not_convertible<char, Function*> ();
test_is_not_convertible<char, Array> ();
test_is_not_convertible<char, Array&> ();
test_is_convertible<char, char> ();
static_assert((!std::is_convertible<char, char&>::value), "");
static_assert(( std::is_convertible<char, const char&>::value), "");
static_assert((!std::is_convertible<const char, char&>::value), "");
static_assert(( std::is_convertible<const char, const char&>::value), "");
test_is_not_convertible<char, char*> ();
// char&
test_is_not_convertible<char&, void> ();
test_is_not_convertible<char&, Function> ();
test_is_not_convertible<char&, Function&> ();
test_is_not_convertible<char&, Function*> ();
test_is_not_convertible<char&, Array> ();
test_is_not_convertible<char&, Array&> ();
test_is_convertible<char&, char> ();
static_assert(( std::is_convertible<char&, char&>::value), "");
static_assert(( std::is_convertible<char&, const char&>::value), "");
static_assert((!std::is_convertible<const char&, char&>::value), "");
static_assert(( std::is_convertible<const char&, const char&>::value), "");
test_is_not_convertible<char&, char*> ();
// char*
test_is_not_convertible<char*, void> ();
test_is_not_convertible<char*, Function> ();
test_is_not_convertible<char*, Function&> ();
test_is_not_convertible<char*, Function*> ();
test_is_not_convertible<char*, Array> ();
test_is_not_convertible<char*, Array&> ();
test_is_not_convertible<char*, char> ();
test_is_not_convertible<char*, char&> ();
static_assert(( std::is_convertible<char*, char*>::value), "");
static_assert(( std::is_convertible<char*, const char*>::value), "");
static_assert((!std::is_convertible<const char*, char*>::value), "");
static_assert(( std::is_convertible<const char*, const char*>::value), "");
// NonCopyable
static_assert((std::is_convertible<NonCopyable&, NonCopyable&>::value), "");
static_assert((std::is_convertible<NonCopyable&, const NonCopyable&>::value), "");
static_assert((std::is_convertible<NonCopyable&, const volatile NonCopyable&>::value), "");
static_assert((std::is_convertible<NonCopyable&, volatile NonCopyable&>::value), "");
static_assert((std::is_convertible<const NonCopyable&, const NonCopyable&>::value), "");
static_assert((std::is_convertible<const NonCopyable&, const volatile NonCopyable&>::value), "");
static_assert((std::is_convertible<volatile NonCopyable&, const volatile NonCopyable&>::value), "");
static_assert((std::is_convertible<const volatile NonCopyable&, const volatile NonCopyable&>::value), "");
static_assert((!std::is_convertible<const NonCopyable&, NonCopyable&>::value), "");
// This test requires Access control SFINAE which we only have in C++11 or when
// we are using the compiler builtin for is_convertible.
#if __cplusplus >= 201103L || !defined(_LIBCPP_USE_IS_CONVERTIBLE_FALLBACK)
test_is_not_convertible<NonCopyable&, NonCopyable>();
#endif
// Ensure that CannotInstantiate is not instantiated by is_convertible when it is not needed.
// For example CannotInstantiate is instatiated as a part of ADL lookup for arguments of type CannotInstantiate*.
static_assert((std::is_convertible<CannotInstantiate<int>*, CannotInstantiate<int>*>::value), "");
}
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