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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>
// 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) \
([&]() -> std::decay_t<decltype(expr)> const& { static const std::decay_t<decltype(expr)> INIT##ident = (expr); return 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(...) (([&] { __VA_ARGS__ })())
#define prog1(x, ...) (([&] { decltype(auto) ret1324 = (x); __VA_ARGS__; return ret1324; })())
// end c++-only macros
#endif
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