libcxx/include/wctype.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP_WCTYPE_H
  11 #define _LIBCPP_WCTYPE_H
  12
  13 /*
  14     wctype.h synopsis
  15
  16 Macros:
  17
  18     WEOF
  19
  20 Types:
  21
  22     wint_t
  23     wctrans_t
  24     wctype_t
  25
  26 int iswalnum(wint_t wc);
  27 int iswalpha(wint_t wc);
  28 int iswblank(wint_t wc);  // C99
  29 int iswcntrl(wint_t wc);
  30 int iswdigit(wint_t wc);
  31 int iswgraph(wint_t wc);
  32 int iswlower(wint_t wc);
  33 int iswprint(wint_t wc);
  34 int iswpunct(wint_t wc);
  35 int iswspace(wint_t wc);
  36 int iswupper(wint_t wc);
  37 int iswxdigit(wint_t wc);
  38 int iswctype(wint_t wc, wctype_t desc);
  39 wctype_t wctype(const char* property);
  40 wint_t towlower(wint_t wc);
  41 wint_t towupper(wint_t wc);
  42 wint_t towctrans(wint_t wc, wctrans_t desc);
  43 wctrans_t wctrans(const char* property);
  44
  45 */
  46
  47 #include <__config>
  48
  49 #if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
  50 #   error "The <wctype.h> header is not supported since libc++ has been configured with LIBCXX_ENABLE_WIDE_CHARACTERS disabled"
  51 #endif
  52
  53 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  54 #  pragma GCC system_header
  55 #endif
  56
  57 // TODO:
  58 // In the future, we should unconditionally include_next <wctype.h> here and instead
  59 // have a mode under which the library does not need libc++'s <wctype.h> or <cwctype>
  60 // at all (i.e. a mode without wchar_t). As it stands, we need to do that to completely
  61 // bypass the using declarations in <cwctype> when we did not include <wctype.h>.
  62 // Otherwise, a using declaration like `using ::wint_t` in <cwctype> will refer to
  63 // nothing (with using_if_exists), and if we include another header that defines one
  64 // of these declarations (e.g. <wchar.h>), the second `using ::wint_t` with using_if_exists
  65 // will fail because it does not refer to the same declaration.
  66 #if __has_include_next(<wctype.h>)
  67 #   include_next <wctype.h>
  68 #   define _LIBCPP_INCLUDED_C_LIBRARY_WCTYPE_H
  69 #endif
  70
  71 #ifdef __cplusplus
  72
  73 #undef iswalnum
  74 #undef iswalpha
  75 #undef iswblank
  76 #undef iswcntrl
  77 #undef iswdigit
  78 #undef iswgraph
  79 #undef iswlower
  80 #undef iswprint
  81 #undef iswpunct
  82 #undef iswspace
  83 #undef iswupper
  84 #undef iswxdigit
  85 #undef iswctype
  86 #undef wctype
  87 #undef towlower
  88 #undef towupper
  89 #undef towctrans
  90 #undef wctrans
  91
  92 #endif // __cplusplus
  93
  94 #endif // _LIBCPP_WCTYPE_H