GCC錯誤：使用MSVC C++代碼之前''''令牌的預期主表達式

Question

這裏是由GCC產生的怪異錯誤代碼，但不是MSVC產生的錯誤代碼（5錯誤，在錯誤行註釋引用）：

/* Match STRING against the filename pattern PATTERN, returning zero if 
    it matches, nonzero if not. */ 
int GNU_fnmatch (const char* pattern,const char* string,int flags) 
{ 
    register const char *p = pattern, *n = string; 
    register unsigned char c; 

    #define FNM_CASEFOLD 16 
    #define FNM_LEADING_DIR 8 

    #define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c)) 

    while ((c = *p++) != '\0') 
    { 
     c = FOLD (c); 

     switch (c) 
     { 
     case '?': 
      if (*n == '\0') 
       return 1; 
      else if ((flags & FNM_PATHNAME) && *n == '/') 
       return 1; 
      else if ((flags & FNM_PERIOD) && *n == '.' && 
       (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/'))) 
       return 1; 
      break; 

     case '\\': 
      if (!(flags & FNM_NOESCAPE)) 
      { 
       c = *p++; 
       c = FOLD (c); 
      } 
      if (FOLD ((unsigned char)*n) != c) 
       return 1; 
      break; 

     case '*': 
      if ((flags & FNM_PERIOD) && *n == '.' && 
       (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/'))) 
       return 1; 

      for (c = *p++; c == '?' || c == '*'; c = *p++, ++n) 
      if (((flags & FNM_PATHNAME) && *n == '/') || 
      (c == '?' && *n == '\0')) 
       return 1; 

      if (c == '\0') 
       return 0; 

      { 
      unsigned char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c; 
      c1 = FOLD (c1); 
      for (--p; *n != '\0'; ++n) 
       if ((c == '[' || FOLD ((unsigned char)*n) == c1) && 
       GNU_fnmatch (p, n, flags & ~FNM_PERIOD) == 0) 
       return 0; 
      return 1; 
      } 

     case '[': 
      { 
      /* Nonzero if the sense of the character class is inverted. */ 
      register int not; // Error 1 error : expected unqualified-id before '!' token 

      if (*n == '\0') 
       return 1; 

      if ((flags & FNM_PERIOD) && *n == '.' && 
      (n == string || ((flags & FNM_PATHNAME) && n[-1] == '/'))) 
       return 1; 

      not = (*p == '!' || *p == '^'); // Error 2 error : expected primary-expression before '=' token 
      if (not) // Error 3 error : expected primary-expression before ')' token 
       ++p; 

      c = *p++; 
      for (;;) 
       { 
      register unsigned char cstart = c, cend = c; 

      if (!(flags & FNM_NOESCAPE) && c == '\\') 
       cstart = cend = *p++; 

      cstart = cend = FOLD (cstart); 

      if (c == '\0') 
       /* [ (unterminated) loses. */ 
       return 1; 

      c = *p++; 
      c = FOLD (c); 

      if ((flags & FNM_PATHNAME) && c == '/') 
       /* [/] can never match. */ 
       return 1; 

      if (c == '-' && *p != ']') 
       { 
       cend = *p++; 
       if (!(flags & FNM_NOESCAPE) && cend == '\\') 
        cend = *p++; 
       if (cend == '\0') 
        return 1; 
       cend = FOLD (cend); 

       c = *p++; 
       } 

      if (FOLD ((unsigned char)*n) >= cstart 
       && FOLD ((unsigned char)*n) <= cend) 
       goto matched; 

      if (c == ']') 
       break; 
       } 
      if (!not) // Error 4 error : expected primary-expression before ')' token 
       return 1; 
      break; 

      matched:; 
      /* Skip the rest of the [...] that already matched. */ 
      while (c != ']') 
       { 
      if (c == '\0') 
       /* [... (unterminated) loses. */ 
       return 1; 

      c = *p++; 
      if (!(flags & FNM_NOESCAPE) && c == '\\') 
       /* XXX 1003.2d11 is unclear if this is right. */ 
       ++p; 
       } 
      if (not) // Error 5 error : expected primary-expression before ')' token 
       return 1; 
      } 
      break; 

     default: 
      if (c != FOLD ((unsigned char)*n)) 
      return 1; 
     } 

     ++n; 
    } 

    if (*n == '\0') 
     return 0; 

    if ((flags & FNM_LEADING_DIR) && *n == '/') 
    /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */ 
     return 0; 

    return 1; 
} 

我的意思是，它甚至沒有意義，纏着不存在的'！'令牌（錯誤1）!!!

Answer 1

not是在C++的保留字，但不是C.下

誤差是不言自明：

if (!not) // Error 4 error : expected primary-expression before ')' token 
     ^//expecting operand for 'not' to act on, got ')' instead. 

編譯與任何Coptions在GCC，或變化的名字。