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f68f31c9c4580bef1dfb11c3e57c885fa314cbdf
callable_traits/test/has_varargs.cpp
badair 321e79815c GCC support back to 4.8.0
2016-04-16 03:16:25 -05:00

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/*
Copyright Barrett Adair 2016
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt)
*/
#include <type_traits>
#include <functional>
#include <utility>
#include <callable_traits/has_varargs.hpp>
#ifndef CT_ASSERT
#define CT_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
#endif //CT_ASSERT
#ifdef CALLABLE_TRAITS_DISABLE_REFERENCE_QUALIFIERS
#define LREF
#define RREF
#else
#define LREF &
#define RREF &&
#endif
struct foo {};
namespace ct = callable_traits;
template<typename T>
void assert_has_varargs() {
CT_ASSERT(ct::has_varargs<T>());
CT_ASSERT(ct::has_varargs<T&>());
CT_ASSERT(ct::has_varargs<T &&>());
CT_ASSERT(ct::has_varargs<T const>());
CT_ASSERT(ct::has_varargs<T const &>());
CT_ASSERT(ct::has_varargs<T const &&>());
CT_ASSERT(ct::has_varargs<T volatile>());
CT_ASSERT(ct::has_varargs<T volatile &>());
CT_ASSERT(ct::has_varargs<T volatile &&>());
CT_ASSERT(ct::has_varargs<T const volatile &>());
CT_ASSERT(ct::has_varargs<T const volatile &&>());
CT_ASSERT(decltype(ct::has_varargs(std::declval<T>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T&>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T &&>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T const>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T const &>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T const &&>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T volatile>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T volatile &>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T volatile &&>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T const volatile &>()))::value);
CT_ASSERT(decltype(ct::has_varargs(std::declval<T const volatile &&>()))::value);
}
template<typename T>
void assert_not_has_varargs() {
CT_ASSERT(!ct::has_varargs<T>());
CT_ASSERT(!ct::has_varargs<T&>());
CT_ASSERT(!ct::has_varargs<T &&>());
CT_ASSERT(!ct::has_varargs<T const>());
CT_ASSERT(!ct::has_varargs<T const &>());
CT_ASSERT(!ct::has_varargs<T const &&>());
CT_ASSERT(!ct::has_varargs<T volatile>());
CT_ASSERT(!ct::has_varargs<T volatile &>());
CT_ASSERT(!ct::has_varargs<T volatile &&>());
CT_ASSERT(!ct::has_varargs<T const volatile &>());
CT_ASSERT(!ct::has_varargs<T const volatile &&>());
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T&>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T &&>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T const>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T const &>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T const &&>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T volatile>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T volatile &>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T volatile &&>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T const volatile &>()))::value);
CT_ASSERT(!decltype(ct::has_varargs(std::declval<T const volatile &&>()))::value);
}
int main() {
{
using f = void(foo::*)();
using l = void(foo::*)() LREF;
using r = void(foo::*)() RREF ;
using c = void(foo::*)() const;
using cl = void(foo::*)() const LREF;
using cr = void(foo::*)() const RREF;
using v = void(foo::*)() volatile;
using vl = void(foo::*)() volatile LREF;
using vr = void(foo::*)() volatile RREF;
using cv = void(foo::*)() const volatile;
using cvl = void(foo::*)() const volatile LREF;
using cvr = void(foo::*)() const volatile RREF;
assert_not_has_varargs<f>();
assert_not_has_varargs<l>();
assert_not_has_varargs<r>();
assert_not_has_varargs<c>();
assert_not_has_varargs<cl>();
assert_not_has_varargs<cr>();
assert_not_has_varargs<v>();
assert_not_has_varargs<vl>();
assert_not_has_varargs<vr>();
assert_not_has_varargs<cv>();
assert_not_has_varargs<cvl>();
assert_not_has_varargs<cvr>();
}
{
using f = int foo::*;
using l = int foo::* LREF;
using r = int foo::* RREF ;
using c = int foo::* const;
using cl = int foo::* const LREF;
using cr = int foo::* const RREF;
using v = int foo::* volatile;
using vl = int foo::* volatile LREF;
using vr = int foo::* volatile RREF;
using cv = int foo::* const volatile;
using cvl = int foo::* const volatile LREF;
using cvr = int foo::* const volatile RREF;
assert_not_has_varargs<f>();
assert_not_has_varargs<l>();
assert_not_has_varargs<r>();
assert_not_has_varargs<c>();
assert_not_has_varargs<cl>();
assert_not_has_varargs<cr>();
assert_not_has_varargs<v>();
assert_not_has_varargs<vl>();
assert_not_has_varargs<vr>();
assert_not_has_varargs<cv>();
assert_not_has_varargs<cvl>();
assert_not_has_varargs<cvr>();
}
{
//a member data pointer to a function pointer
//is not treated like a member function pointer
using f_ptr = void(*)(...);
using f = f_ptr foo::*;
using l = f_ptr foo::* &;
using r = f_ptr foo::* && ;
using c = f_ptr foo::* const;
using cl = f_ptr foo::* const &;
using cr = f_ptr foo::* const &&;
using v = f_ptr foo::* volatile;
using vl = f_ptr foo::* volatile &;
using vr = f_ptr foo::* volatile &&;
using cv = f_ptr foo::* const volatile;
using cvl = f_ptr foo::* const volatile &;
using cvr = f_ptr foo::* const volatile &&;
assert_not_has_varargs<f>();
assert_not_has_varargs<l>();
assert_not_has_varargs<r>();
assert_not_has_varargs<c>();
assert_not_has_varargs<cl>();
assert_not_has_varargs<cr>();
assert_not_has_varargs<v>();
assert_not_has_varargs<vl>();
assert_not_has_varargs<vr>();
assert_not_has_varargs<cv>();
assert_not_has_varargs<cvl>();
assert_not_has_varargs<cvr>();
}
{
using f = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...);
using l = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) LREF;
using r = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) RREF ;
using c = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) const;
using cl = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) const LREF;
using cr = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) const RREF;
using v = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) volatile;
using vl = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) volatile LREF;
using vr = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) volatile RREF;
using cv = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) const volatile;
using cvl = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) const volatile LREF;
using cvr = void(CALLABLE_TRAITS_DEFAULT_VARARGS_CC foo::*)(...) const volatile RREF;
assert_has_varargs<f>();
assert_has_varargs<l>();
assert_has_varargs<r>();
assert_has_varargs<c>();
assert_has_varargs<cl>();
assert_has_varargs<cr>();
assert_has_varargs<v>();
assert_has_varargs<vl>();
assert_has_varargs<vr>();
assert_has_varargs<cv>();
assert_has_varargs<cvl>();
assert_has_varargs<cvr>();
}
{
struct f { int operator()() { return 0; } };
struct l { int operator()() LREF { return 0; } };
struct r { int operator()() RREF { return 0; } };
struct c { int operator()() const { return 0; } };
struct cl { int operator()() const LREF { return 0; } };
struct cr { int operator()() const RREF { return 0; } };
struct v { int operator()() volatile { return 0; } };
struct vl { int operator()() volatile LREF { return 0; } };
struct vr { int operator()() volatile RREF { return 0; } };
struct cv { int operator()() const volatile { return 0; } };
struct cvl { int operator()() const volatile LREF { return 0; } };
struct cvr { int operator()() const volatile RREF { return 0; } };
assert_not_has_varargs<f>();
assert_not_has_varargs<l>();
assert_not_has_varargs<r>();
assert_not_has_varargs<c>();
assert_not_has_varargs<cl>();
assert_not_has_varargs<cr>();
assert_not_has_varargs<v>();
assert_not_has_varargs<vl>();
assert_not_has_varargs<vr>();
assert_not_has_varargs<cv>();
assert_not_has_varargs<cvl>();
assert_not_has_varargs<cvr>();
}
{
struct f { int operator()(...) { return 0; } };
struct l { int operator()(...) LREF { return 0; } };
struct r { int operator()(...) RREF { return 0; } };
struct c { int operator()(...) const { return 0; } };
struct cl { int operator()(...) const LREF { return 0; } };
struct cr { int operator()(...) const RREF { return 0; } };
struct v { int operator()(...) volatile { return 0; } };
struct vl { int operator()(...) volatile LREF { return 0; } };
struct vr { int operator()(...) volatile RREF { return 0; } };
struct cv { int operator()(...) const volatile { return 0; } };
struct cvl { int operator()(...) const volatile LREF { return 0; } };
struct cvr { int operator()(...) const volatile RREF { return 0; } };
assert_has_varargs<f>();
assert_has_varargs<l>();
assert_has_varargs<r>();
assert_has_varargs<c>();
assert_has_varargs<cl>();
assert_has_varargs<cr>();
assert_has_varargs<v>();
assert_has_varargs<vl>();
assert_has_varargs<vr>();
assert_has_varargs<cv>();
assert_has_varargs<cvl>();
assert_has_varargs<cvr>();
}
#ifndef CALLABLE_TRAITS_DISABLE_ABOMINABLE_FUNCTIONS
{
using f = void();
using l = void() LREF;
using r = void() RREF ;
using c = void() const;
using cl = void() const LREF;
using cr = void() const RREF;
using v = void() volatile;
using vl = void() volatile LREF;
using vr = void() volatile RREF;
using cv = void() const volatile;
using cvl = void() const volatile LREF;
using cvr = void() const volatile RREF;
CT_ASSERT(!ct::has_varargs<f>());
CT_ASSERT(!ct::has_varargs<l>());
CT_ASSERT(!ct::has_varargs<r>());
CT_ASSERT(!ct::has_varargs<c>());
CT_ASSERT(!ct::has_varargs<cl>());
CT_ASSERT(!ct::has_varargs<cr>());
CT_ASSERT(!ct::has_varargs<v>());
CT_ASSERT(!ct::has_varargs<vl>());
CT_ASSERT(!ct::has_varargs<vr>());
CT_ASSERT(!ct::has_varargs<cv>());
CT_ASSERT(!ct::has_varargs<cvl>());
CT_ASSERT(!ct::has_varargs<cvr>());
}
{
using f = void(...);
using l = void(...) LREF;
using r = void(...) RREF ;
using c = void(...) const;
using cl = void(...) const LREF;
using cr = void(...) const RREF;
using v = void(...) volatile;
using vl = void(...) volatile LREF;
using vr = void(...) volatile RREF;
using cv = void(...) const volatile;
using cvl = void(...) const volatile LREF;
using cvr = void(...) const volatile RREF;
CT_ASSERT(ct::has_varargs<f>());
CT_ASSERT(ct::has_varargs<l>());
CT_ASSERT(ct::has_varargs<r>());
CT_ASSERT(ct::has_varargs<c>());
CT_ASSERT(ct::has_varargs<cl>());
CT_ASSERT(ct::has_varargs<cr>());
CT_ASSERT(ct::has_varargs<v>());
CT_ASSERT(ct::has_varargs<vl>());
CT_ASSERT(ct::has_varargs<vr>());
CT_ASSERT(ct::has_varargs<cv>());
CT_ASSERT(ct::has_varargs<cvl>());
CT_ASSERT(ct::has_varargs<cvr>());
}
#endif //#ifndef CALLABLE_TRAITS_DISABLE_ABOMINABLE_FUNCTIONS
assert_not_has_varargs<void(*)()>();
assert_has_varargs<void(*)(...)>();
assert_not_has_varargs<void(&)()>();
assert_has_varargs<void(&)(...)>();
}
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