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      std::iswxdigit

      From cppreference.com
      <cpp‎ |string‎ |wide
       
       
       
       
      Defined in header<cwctype>
      int iswxdigit( wint_t ch);

      Checks if the given wide character corresponds (if narrowed) to a hexadecimal numeric character, i.e. one of0123456789abcdefABCDEF.

      If the value ofch is neither representable as awchar_t nor equal to the value of the macroWEOF, the behavior is undefined.

      Contents

      [edit]Parameters

      ch - wide character

      [edit]Return value

      Non-zero value if the wide character is a hexadecimal numeric character, zero otherwise.

      [edit]Notes

      std::iswdigit andstd::iswxdigit are the only standard wide character classification functions that are not affected by the currently installed C locale.

      [edit]Example

      Run this code
      #include <cwctype>#include <iostream> int main(){std::cout<<std::boolalpha<<(std::iswxdigit(L'a')!=0)<<' '<<(std::iswxdigit(L'ä')!=0)<<'\n';}

      Output:

      true false

      [edit]See also

      checks if a character is classified as a hexadecimal digit by a locale
      (function template)[edit]
      checks if a character is a hexadecimal character
      (function)[edit]
      C documentation foriswxdigit
      ASCII valuescharacters

      iscntrl
      iswcntrl

      isprint
      iswprint

      isspace
      iswspace

      isblank
      iswblank

      isgraph
      iswgraph

      ispunct
      iswpunct

      isalnum
      iswalnum

      isalpha
      iswalpha

      isupper
      iswupper

      islower
      iswlower

      isdigit
      iswdigit

      isxdigit
      iswxdigit

      decimalhexadecimaloctal
      0–8\x0–\x8\0–\10control codes (NUL, etc.)≠000000000000
      9\x9\11tab (\t)≠00≠0≠000000000
      10–13\xA–\xD\12–\15whitespaces (\n,\v,\f,\r)≠00≠0000000000
      14–31\xE–\x1F\16–\37control codes≠000000000000
      32\x20\40space0≠0≠0≠000000000
      33–47\x21–\x2F\41–\57!"#$%&'()*+,-./0≠000≠0≠0000000
      48–57\x30–\x39\60–\7101234567890≠000≠00≠0000≠0≠0
      58–64\x3A–\x40\72–\100:;<=>?@0≠000≠0≠0000000
      65–70\x41–\x46\101–\106ABCDEF0≠000≠00≠0≠0≠000≠0
      71–90\x47–\x5A\107–\132GHIJKLMNOP
      QRSTUVWXYZ      		0≠000≠00≠0≠0≠0000
      91–96\x5B–\x60\133–\140[\]^_`0≠000≠0≠0000000
      97–102\x61–\x66\141–\146abcdef0≠000≠00≠0≠00≠00≠0
      103–122\x67–\x7A\147–\172ghijklmnop
      qrstuvwxyz      		0≠000≠00≠0≠00≠000
      123–126\x7B–\x7E\172–\176{|}~0≠000≠0≠0000000
      127\x7F\177backspace character (DEL)≠000000000000
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