29#ifndef _GLIBCXX_TR1_CWCHAR
30#define _GLIBCXX_TR1_CWCHAR 1
32#pragma GCC system_header
36#ifdef _GLIBCXX_USE_WCHAR_T
38namespace std _GLIBCXX_VISIBILITY(default)
40_GLIBCXX_BEGIN_NAMESPACE_VERSION
44#if _GLIBCXX_HAVE_WCSTOF
47#if _GLIBCXX_HAVE_VFWSCANF
50#if _GLIBCXX_HAVE_VSWSCANF
53#if _GLIBCXX_HAVE_VWSCANF
57#if _GLIBCXX_USE_C99_WCHAR
64_GLIBCXX_END_NAMESPACE_VERSION
ISO C++ entities toplevel namespace is std.