C language compilers

Keywords

The following identifiers are reserved for use as keywords and may not be used otherwise:

   asm         default    _Imaginary    static
   __asm       do         inline        struct
   auto        double     int           switch
   _Bool       else       long          typedef
   break       enum       register      union
   case        extern     restrict      unsigned
   char        float      return        void
   _Complex    for        short         volatile
   const       goto       signed        while
   continue    if         sizeof

The keyword asm is reserved in all compilation modes except -Xc. The keyword __asm is a synonym for asm and is available under all compilation modes, although a warning will be issued when it is used under the -Xc mode.

The the new C99 keywords Complex and Imaginary are not recognized as keywords for -Xc and -Xb.