Multi-character constants

From:

Mirco Wahab <wahab@chemie.uni-halle.de>

Newsgroups:

comp.lang.c++

Date:

Wed, 09 Jul 2008 16:29:32 +0200

Message-ID:

<g52i0c$cft$1@nserver.hrz.tu-freiberg.de>

After reading through some (open) Intel (CPU detection)
C++ source (www.intel.com/cd/ids/developer/asmo-na/eng/276611.htm)
I stumbled upon a sketchy use of multibyte characters

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

260:
         unsigned int VendorID[3] = {0, 0, 0};
         try // If CPUID instruction is supported
         {
          ...
         }
         catch (...)
         {
          ...
         }
         return (
                  (VendorID[0] == 'uneG') &&
                  (VendorID[1] == 'Ieni') &&
                  (VendorID[2] == 'letn')
                );

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

This seems to work, gcc 4.2 emits a warning:

    "warning: multi-character character constant"

and Visual C++ 9 says nothing at all.

Whats the matter w/multibyte characters now?
I didn't use them and would be glad to learn
if they are widely implemented and part of
the standard soon/now?

gcc tells us: (http://gcc.gnu.org/onlinedocs/gcc/Characters-implementation.html)
  ...
  [Characters]
  ...
  The value of a wide character constant containing more than
  one multibyte character, or containing a multibyte character
  or escape sequence not represented in the extended execution
  character set (C90 6.1.3.4, C99 6.4.4.4).
  ...

Regards & Thanks for clearing this

M.

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