(defconst cosmo-c-constants-regex
  (let (

        (c11-constants
         '("__func__"
           "__STDC_IEC_559__"
           "__VA_ARGS__"
           "__FILE__"
           "__LINE__"
           "__DATE__"
           "__STDC__"
           "__STDC_HOSTED__"
           "__STDC_VERSION__"
           "__TIME__"
           "__STDC_ISO_10646__"
           "__STDC_MB_MIGHT_NEQ_WC__"
           "__STDC_UTF_16__"
           "__STDC_UTF_32__"
           "__STDC_ANALYZABLE__"
           "__STDC_IEC_559_COMPLEX__"
           "__STDC_LIB_EXT1__"
           "__STDC_NO_ATOMICS__"
           "__STDC_NO_COMPLEX__"
           "__STDC_NO_THREADS__"
           "__STDC_NO_VLA__"
           "__STDC_WANT_LIB_EXT1__"))

        (gcc-cpp-412-constants
         '("__BASE_FILE__"
           "__CHAR_BIT__"
           "__FUNCTION__"
           "__GNUC_MINOR__"
           "__GNUC_PATCHLEVEL__"
           "__GNUC__"
           "__GNUG__"
           "__INCLUDE_LEVEL__"
           "__INTMAX_MAX__"
           "__INT_MAX__"
           "__LONG_LONG_MAX__"
           "__LONG_MAX__"
           "__SCHAR_MAX__"
           "__SHRT_MAX__"
           "__DBL_MIN__"
           "__DBL_MAX__"
           "__FLT_MIN__"
           "__FLT_MAX__"
           "__WCHAR_MAX__"
           "__WCHAR_UNSIGNED__"))

        (gcc-cpp-92-constants
         '("__x86_64__"
           "__amd64__"
           "__WINT_MAX__"
           "__BIGGEST_ALIGNMENT__"
           "__SIZE_MAX__"
           "__PTRDIFF_MAX__"
           "__UINTMAX_MAX__"
           "__SIG_ATOMIC_MAX__"
           "__INT8_MAX__"
           "__INT16_MAX__"
           "__INT32_MAX__"
           "__INT64_MAX__"
           "__UINT8_MAX__"
           "__UINT16_MAX__"
           "__UINT32_MAX__"
           "__UINT64_MAX__"
           "__INT_LEAST8_MAX__"
           "__INT_LEAST16_MAX__"
           "__INT_LEAST32_MAX__"
           "__INT_LEAST64_MAX__"
           "__UINT_LEAST8_MAX__"
           "__UINT_LEAST16_MAX__"
           "__UINT_LEAST32_MAX__"
           "__UINT_LEAST64_MAX__"
           "__INT_FAST8_MAX__"
           "__INT_FAST16_MAX__"
           "__INT_FAST32_MAX__"
           "__INT_FAST64_MAX__"
           "__UINT_FAST8_MAX__"
           "__UINT_FAST16_MAX__"
           "__UINT_FAST32_MAX__"
           "__UINT_FAST64_MAX__"
           "__INTPTR_MAX__"
           "__UINTPTR_MAX__"
           "__WCHAR_MIN__"
           "__WINT_MIN__"
           "__SIG_ATOMIC_MIN__"
           "__SCHAR_WIDTH__"
           "__SHRT_WIDTH__"
           "__INT_WIDTH__"
           "__LONG_WIDTH__"
           "__LONG_LONG_WIDTH__"
           "__PTRDIFF_WIDTH__"
           "__SIG_ATOMIC_WIDTH__"
           "__SIZE_WIDTH__"
           "__WCHAR_WIDTH__"
           "__WINT_WIDTH__"
           "__INT_LEAST8_WIDTH__"
           "__INT_LEAST16_WIDTH__"
           "__INT_LEAST32_WIDTH__"
           "__INT_LEAST64_WIDTH__"
           "__INT_FAST8_WIDTH__"
           "__INT_FAST16_WIDTH__"
           "__INT_FAST32_WIDTH__"
           "__INT_FAST64_WIDTH__"
           "__INTPTR_WIDTH__"
           "__INTMAX_WIDTH__"
           "__SIZEOF_INT__"
           "__SIZEOF_INTMAX__"
           "__SIZEOF_UINTMAX__"
           "__SIZEOF_LONG__"
           "__SIZEOF_LONG_LONG__"
           "__SIZEOF_SHORT__"
           "__SIZEOF_POINTER__"
           "__SIZEOF_FLOAT__"
           "__SIZEOF_DOUBLE__"
           "__SIZEOF_LONG_DOUBLE__"
           "__SIZEOF_SIZE_T__"
           "__SIZEOF_WCHAR_T__"
           "__SIZEOF_WINT_T__"
           "__SIZEOF_PTRDIFF_T__"
           "__TIMESTAMP__"))

        (limits
         '("SIZEOF_SHORT"
           "SIZEOF_INT"
           "SIZEOF_LONG"
           "SIZEOF_LONG_LONG"
           "SIZEOF_POINTER"
           "SIZEOF_PTRDIFF_T"
           "SIZEOF_SIZE_T"
           "SIZEOF_WCHAR_T"
           "SIZEOF_WINT_T"
           "SIZEOF_FLOAT"
           "SIZEOF_FLOAT128"
           "SIZEOF_DOUBLE"
           "SIZEOF_FLOAT80"
           "SIZEOF_LONG_DOUBLE"
           "SIZEOF_INTMAX"
           "SCHAR_MAX"
           "SHRT_MAX"
           "INT_MAX"
           "LONG_MAX"
           "LLONG_MAX"
           "LONG_LONG_MAX"
           "SIZE_MAX"
           "INT8_MAX"
           "INT16_MAX"
           "INT32_MAX"
           "INT64_MAX"
           "WINT_MAX"
           "WCHAR_MAX"
           "INTPTR_MAX"
           "PTRDIFF_MAX"
           "SCHAR_MIN"
           "SHRT_MIN"
           "UINT_MIN"
           "INT_MIN"
           "LONG_MIN"
           "LLONG_MIN"
           "LONG_LONG_MIN"
           "SIZE_MIN"
           "INT8_MIN"
           "INT16_MIN"
           "INT32_MIN"
           "INT64_MIN"
           "INTMAX_MIN"
           "INTPTR_MIN"
           "WINT_MIN"
           "WCHAR_MIN"
           "PTRDIFF_MIN"
           "USHRT_MAX"
           "UINT_MAX"
           "ULONG_MAX"
           "ULLONG_MAX"
           "ULONG_LONG_MAX"
           "UINTPTR_MAX"
           "UINT8_MAX"
           "UINT16_MAX"
           "UINT32_MAX"
           "UINT64_MAX"
           "USHRT_MIN"
           "ULONG_MIN"
           "ULLONG_MIN"
           "ULONG_LONG_MIN"
           "UINT8_MIN"
           "UINT16_MIN"
           "UINT32_MIN"
           "UINT64_MIN"
           "UINTMAX_MIN"
           "UINTPTR_MIN"
           "MB_CUR_MAX"
           "MB_LEN_MAX"
           "INTMAX_MAX"
           "UINTMAX_MAX"
           "INTMAX_MAX"
           "UINTMAX_MAX"
           "DBL_MIN"
           "DBL_MAX"
           "FLT_MIN"
           "FLT_MAX"))

        (cosmopolitan-constants
         '("__SAUCE__"
           "PAGESIZE"
           "FRAMESIZE"
           "BIGPAGESIZE"
           "ENV_MAX"
           "ARG_MAX"
           "CMD_MAX"
           "PATH_MAX"
           "BUFSIZ"
           "CACHELINE"
           "CHAR_BIT"
           "NAME_MAX"
           "NSIG"
           "CHILD_MAX"
           "OPEN_MAX"
           "ATEXIT_MAX"
           "__x86__"
           "__i386__"))

        )
    (concat "\\_<"
            (regexp-opt (append c11-constants
                                gcc-cpp-412-constants
                                gcc-cpp-92-constants
                                cosmopolitan-constants
                                limits))
            "\\_>")))

(provide 'cosmo-c-constants)