libcxx/include/__cxx03/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 <__cxx03/__config>
  48
  49 #if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
  50 #  error                                                                                                               \
  51       "The <wctype.h> header is not supported since libc++ has been configured with LIBCXX_ENABLE_WIDE_CHARACTERS disabled"
  52 #endif
  53
  54 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  55 #  pragma GCC system_header
  56 #endif
  57
  58 // TODO:
  59 // In the future, we should unconditionally include_next <wctype.h> here and instead
  60 // have a mode under which the library does not need libc++'s <wctype.h> or <cwctype>
  61 // at all (i.e. a mode without wchar_t). As it stands, we need to do that to completely
  62 // bypass the using declarations in <cwctype> when we did not include <__cxx03/wctype.h>.
  63 // Otherwise, a using declaration like `using ::wint_t` in <cwctype> will refer to
  64 // nothing (with using_if_exists), and if we include another header that defines one
  65 // of these declarations (e.g. <wchar.h>), the second `using ::wint_t` with using_if_exists
  66 // will fail because it does not refer to the same declaration.
  67 #if __has_include_next(<wctype.h>)
  68 #  include_next <wctype.h>
  69 #  define _LIBCPP_INCLUDED_C_LIBRARY_WCTYPE_H
  70 #endif
  71
  72 #ifdef __cplusplus
  73
  74 #  undef iswalnum
  75 #  undef iswalpha
  76 #  undef iswblank
  77 #  undef iswcntrl
  78 #  undef iswdigit
  79 #  undef iswgraph
  80 #  undef iswlower
  81 #  undef iswprint
  82 #  undef iswpunct
  83 #  undef iswspace
  84 #  undef iswupper
  85 #  undef iswxdigit
  86 #  undef iswctype
  87 #  undef wctype
  88 #  undef towlower
  89 #  undef towupper
  90 #  undef towctrans
  91 #  undef wctrans
  92
  93 #endif // __cplusplus
  94
  95 #endif // _LIBCPP_WCTYPE_H