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#pragma once
#if defined _MSC_VER
# define cc_noinline __declspec(noinline)
#else
# define cc_noinline __attribute__((noinline))
#endif
#if defined _MSC_VER
# define cc_forceinline __forceinline
#else
# define cc_forceinline __attribute__((always_inline))
#endif
#if defined _MSC_VER
# define cc_warn_unused_result _Check_return_
#else
# define cc_warn_unused_result __attribute__((warn_unused_result))
#endif
#if !defined likely
# if defined __GNUC__
# define likely(x) __builtin_expect(!!(x),1)
# define unlikely(x) __builtin_expect(!!(x),0)
# else
# define likely(x) (x)
# define unlikely(x) (x)
# endif
#endif
#if defined _MSC_VER
# define cc_function_name __FUNCSIG__
#else
# define cc_function_name __PRETTY_FUNCTION__
#endif
#if !defined PP_CAT
# define PP_CAT(x,y) PP_CAT1(x,y)
# define PP_CAT1(x,y) PP_CAT2(x,y)
# define PP_CAT2(x,y) x ## y
#endif
#ifndef PP_EXPAND
# define PP_EXPAND(x) PP_EXPAND__2(x)
# define PP_EXPAND__2(x) PP_EXPAND__3(x) x
# define PP_EXPAND__3(x) x
#endif
#if defined __cplusplus
// from now only C++
#include <utility>
#include <type_traits>
// before C++20
namespace cxx20_compat {
template<typename T>
struct remove_cvref {
using type = std::remove_cv_t<std::remove_reference_t<T>>;
};
} // ns cxx20_compat
template<typename t>
using remove_cvref_t = typename cxx20_compat::remove_cvref<t>::type;
template<typename t>
using to_const_lvalue_reference_t = remove_cvref_t<t> const&;
// causes ICE in Visual Studio 2017 Preview. the ICE was reported and they handle them seriously in due time.
// the ICE is caused by decltype(auto) and const& return value
//#define eval_once(expr) ([&]() -> decltype(auto) { static decltype(auto) ret___1132 = (expr); return (decltype(ret___1132) const&) ret___1132; }())
#define eval_once(expr) eval_once__2(expr, PP_CAT(_EVAL_ONCE__, __COUNTER__))
#define eval_once__2(expr, ident) eval_once__3(expr, ident)
#define eval_once__3(expr, ident) \
([&]() -> decltype(auto) { \
static auto INIT##ident = (expr); \
return static_cast<to_const_lvalue_reference_t<decltype(INIT##ident)>>(INIT##ident); \
}())
#include <type_traits>
template<typename t>
using cv_qualified = std::conditional_t<std::is_fundamental_v<std::decay_t<t>>,
std::decay_t<t>,
std::add_lvalue_reference_t<std::add_const_t<std::remove_reference_t<t>>>>;
template<bool>
[[deprecated]] constexpr cc_forceinline void static_warn() {}
template<>
constexpr cc_forceinline void static_warn<true>() {}
#define static_warning(cond) \
static_warn<(cond)>(); \
#define typed_progn(type, ...) ([&]() -> type { __VA_ARGS__ }())
#define progn(...) ([&]() -> decltype(auto) { __VA_ARGS__ }())
#define prog1(x, ...) ([&]() -> decltype(auto) \
{ \
decltype(auto) ret1324 = (x); __VA_ARGS__; return ret1324; \
}())
// end c++-only macros
#endif
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