MRMacros.h

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#pragma once


#define MR_STR(...) MR_STR_(__VA_ARGS__)
#define MR_STR_(...) #__VA_ARGS__

#define MR_IDENTITY(...) __VA_ARGS__

#define MR_END(...) DETAIL_MR_END(__VA_ARGS__)
#define DETAIL_MR_END(...) __VA_ARGS__##_END

#define MR_CONCAT( a, b ) MR_CONCAT_( a, b )
#define MR_CONCAT_( a, b ) a##b
 
#define MR_CONCAT3( a, b, c ) MR_CONCAT3_( a, b, c )
#define MR_CONCAT3_( a, b, c ) a##b##c

#if __cpp_concepts && __has_include(<concepts>) && !(defined(__clang__) && __clang_major__ <= 14) && !(defined(__GNUC__) && !defined(__clang__) && __GNUC__ <= 12)
#   define MR_HAS_REQUIRES 1
#   define MR_REQUIRES_IF_SUPPORTED(...) requires(__VA_ARGS__)
#else
#   define MR_HAS_REQUIRES 0
#   define MR_REQUIRES_IF_SUPPORTED(...)
#endif
 
 
#ifdef _MSC_VER
#define MR_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 
#else
#define MR_NO_UNIQUE_ADDRESS [[no_unique_address]]
#endif
 

#ifdef __clang__
#  define MR_LIFETIMEBOUND [[clang::lifetimebound]]
#  if __clang_major__ >= 20 
#    define MR_LIFETIME_CAPTURE_BY(x)      [[clang::lifetime_capture_by(x)]]
#    define MR_THIS_LIFETIME_CAPTURE_BY(x) [[clang::lifetime_capture_by(x)]]
#  else
#    define MR_LIFETIME_CAPTURE_BY(x)      [[clang::annotate     ("mrbind::lifetime_capture_by=" #x)]]
#    define MR_THIS_LIFETIME_CAPTURE_BY(x) [[clang::annotate_type("mrbind::lifetime_capture_by=" #x)]]
#  endif
#  define MR_LIFETIMEBOUND_NESTED      [[clang::annotate     ("mrbind::lifetimebound_nested")]]
#  define MR_THIS_LIFETIMEBOUND_NESTED [[clang::annotate_type("mrbind::lifetimebound_nested")]]
#  define MR_LIFETIME_CAPTURE_BY_NESTED(x)      [[clang::annotate     ("mrbind::lifetime_capture_by_nested=" #x)]]
#  define MR_THIS_LIFETIME_CAPTURE_BY_NESTED(x) [[clang::annotate_type("mrbind::lifetime_capture_by_nested=" #x)]]
#else
#  define MR_LIFETIMEBOUND
#  define MR_LIFETIME_CAPTURE_BY(x)
#  define MR_THIS_LIFETIME_CAPTURE_BY(x)
#  define MR_LIFETIMEBOUND_NESTED
#  define MR_THIS_LIFETIMEBOUND_NESTED
#  define MR_LIFETIME_CAPTURE_BY_NESTED(x)
#  define MR_THIS_LIFETIME_CAPTURE_BY_NESTED(x)
#endif
 

#if defined(_MSC_VER) && !defined(__clang__) && (!defined(_MSVC_TRADITIONAL) || _MSVC_TRADITIONAL == 1)
#define MR_LEGACY_MSVC_PREPROCESSOR 1
#else
#define MR_LEGACY_MSVC_PREPROCESSOR 0
#endif

#if MR_LEGACY_MSVC_PREPROCESSOR
#define MR_TRIM_LEADING_COMMA(...) DETAIL_MR_TRIM_LEADING_COMMA_ DETAIL_MR_TRIM_LEADING_COMMA_DEFER(__VA_ARGS__)
#define DETAIL_MR_TRIM_LEADING_COMMA_DEFER
#else
#define MR_TRIM_LEADING_COMMA(...) DETAIL_MR_TRIM_LEADING_COMMA_(__VA_ARGS__)
#endif
#define DETAIL_MR_TRIM_LEADING_COMMA_(x, ...) DETAIL_MR_TRIM_LEADING_COMMA_EMPTY(x) __VA_ARGS__
#define DETAIL_MR_TRIM_LEADING_COMMA_EMPTY()