williamr@4: /*
williamr@4:  * Copyright (c) 1999
williamr@4:  * Silicon Graphics Computer Systems, Inc.
williamr@4:  *
williamr@4:  * Permission to use, copy, modify, distribute and sell this software
williamr@4:  * and its documentation for any purpose is hereby granted without fee,
williamr@4:  * provided that the above copyright notice appear in all copies and
williamr@4:  * that both that copyright notice and this permission notice appear
williamr@4:  * in supporting documentation.  Silicon Graphics makes no
williamr@4:  * representations about the suitability of this software for any
williamr@4:  * purpose.  It is provided "as is" without express or implied warranty.
williamr@4:  */ 
williamr@4: 
williamr@4: // WARNING: This is an internal header file, included by other C++
williamr@4: // standard library headers.  You should not attempt to use this header
williamr@4: // file directly.
williamr@4: 
williamr@4: #ifndef _STLP_INTERNAL_CTRAITS_FUNCTIONS_H
williamr@4: #define _STLP_INTERNAL_CTRAITS_FUNCTIONS_H
williamr@4: 
williamr@4: # ifndef _STLP_INTERNAL_FUNCTION_H 
williamr@4: #  include <stl/_function_base.h>
williamr@4: # endif
williamr@4: 
williamr@4: // This file contains a few small adapters that allow a character
williamr@4: // traits class to be used as a function object.
williamr@4: 
williamr@4: _STLP_BEGIN_NAMESPACE
williamr@4: 
williamr@4: template <class _Traits>
williamr@4: struct _Eq_traits
williamr@4:   : public binary_function<typename _Traits::char_type,
williamr@4:                            typename _Traits::char_type,
williamr@4:                            bool>
williamr@4: {
williamr@4:   bool operator()(const typename _Traits::char_type& __x,
williamr@4:                   const typename _Traits::char_type& __y) const
williamr@4:     { return _Traits::eq(__x, __y); }
williamr@4: };
williamr@4: 
williamr@4: template <class _Traits>
williamr@4: struct _Eq_char_bound
williamr@4:   : public unary_function<typename _Traits::char_type, bool>
williamr@4: {
williamr@4:   typename _Traits::char_type __val;
williamr@4:   _Eq_char_bound(typename _Traits::char_type __c) : __val(__c) {}
williamr@4:   bool operator()(const typename _Traits::char_type& __x) const
williamr@4:     { return _Traits::eq(__x, __val); }
williamr@4: };
williamr@4: 
williamr@4: template <class _Traits>
williamr@4: struct _Neq_char_bound
williamr@4:   : public unary_function<typename _Traits::char_type, bool>
williamr@4: {
williamr@4:   typename _Traits::char_type __val;
williamr@4:   _Neq_char_bound(typename _Traits::char_type __c) : __val(__c) {}
williamr@4:   bool operator()(const typename _Traits::char_type& __x) const
williamr@4:     { return !_Traits::eq(__x, __val); }
williamr@4: };
williamr@4: 
williamr@4: template <class _Traits>
williamr@4: struct _Eq_int_bound
williamr@4:   : public unary_function<typename _Traits::char_type, bool>
williamr@4: {
williamr@4:   typename _Traits::int_type __val;
williamr@4: 
williamr@4:   _Eq_int_bound(typename _Traits::int_type __c) : __val(__c) {}
williamr@4:   bool operator()(const typename _Traits::char_type& __x) const
williamr@4:     { return _Traits::eq_int_type(_Traits::to_int_type(__x), __val); }
williamr@4: };
williamr@4: 
williamr@4: # if 0
williamr@4: template <class _Traits>
williamr@4: struct _Lt_traits
williamr@4:   : public binary_function<typename _Traits::char_type,
williamr@4:                            typename _Traits::char_type,
williamr@4:                            bool>
williamr@4: {
williamr@4:   bool operator()(const typename _Traits::char_type& __x,
williamr@4:                   const typename _Traits::char_type& __y) const
williamr@4:     { return _Traits::lt(__x, __y); }
williamr@4: };
williamr@4: # endif
williamr@4: 
williamr@4: _STLP_END_NAMESPACE
williamr@4: 
williamr@4: #endif /* _STLP_INTERNAL_CTRAITS_FUNCTIONS_H */
williamr@4: 
williamr@4: // Local Variables:
williamr@4: // mode:C++
williamr@4: // End:
williamr@4: 
williamr@4: 
williamr@4: 
williamr@4: