boost/algorithm/string/detail/classification.hpp
// Boost string_algo library classification.hpp header file ---------------------------//
// Copyright Pavol Droba 2002-2003. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org for updates, documentation, and revision history.
#ifndef BOOST_STRING_CLASSIFICATION_DETAIL_HPP
#define BOOST_STRING_CLASSIFICATION_DETAIL_HPP
#include <boost/algorithm/string/config.hpp>
#include <algorithm>
#include <functional>
#include <locale>
#include <set>
#include <boost/range/begin.hpp>
#include <boost/range/end.hpp>
#include <boost/algorithm/string/predicate_facade.hpp>
#include <boost/type_traits/remove_const.hpp>
namespace boost {
namespace algorithm {
namespace detail {
// classification functors -----------------------------------------------//
// is_classified functor
struct is_classifiedF :
public predicate_facade<is_classifiedF>
{
// Boost.Lambda support
template <class Args> struct sig { typedef bool type; };
// Constructor from a locale
is_classifiedF(std::ctype_base::mask Type, std::locale const & Loc = std::locale()) :
m_Type(Type), m_Locale(Loc) {}
// Operation
template<typename CharT>
bool operator()( CharT Ch ) const
{
return std::use_facet< std::ctype<CharT> >(m_Locale).is( m_Type, Ch );
}
#if defined(__BORLANDC__) && (__BORLANDC__ >= 0x560) && (__BORLANDC__ <= 0x582) && !defined(_USE_OLD_RW_STL)
template<>
bool operator()( char const Ch ) const
{
return std::use_facet< std::ctype<char> >(m_Locale).is( m_Type, Ch );
}
#endif
private:
const std::ctype_base::mask m_Type;
const std::locale m_Locale;
};
// is_any_of functor
/*
returns true if the value is from the specified set
*/
template<typename CharT>
struct is_any_ofF :
public predicate_facade<is_any_ofF<CharT> >
{
// Boost.Lambda support
template <class Args> struct sig { typedef bool type; };
// Constructor
template<typename RangeT>
is_any_ofF( const RangeT& Range ) :
m_Set( begin(Range), end(Range) ) {}
// Operation
template<typename Char2T>
bool operator()( Char2T Ch ) const
{
return m_Set.find(Ch)!=m_Set.end();
}
private:
// set cannot operate on const value-type
typedef typename remove_const<CharT>::type set_value_type;
std::set<set_value_type> m_Set;
};
// is_from_range functor
/*
returns true if the value is from the specified range.
(i.e. x>=From && x>=To)
*/
template<typename CharT>
struct is_from_rangeF :
public predicate_facade< is_from_rangeF<CharT> >
{
// Boost.Lambda support
template <class Args> struct sig { typedef bool type; };
// Constructor
is_from_rangeF( CharT From, CharT To ) : m_From(From), m_To(To) {}
// Operation
template<typename Char2T>
bool operator()( Char2T Ch ) const
{
return ( m_From <= Ch ) && ( Ch <= m_To );
}
private:
CharT m_From;
CharT m_To;
};
// class_and composition predicate
template<typename Pred1T, typename Pred2T>
struct pred_andF :
public predicate_facade< pred_andF<Pred1T,Pred2T> >
{
public:
// Boost.Lambda support
template <class Args> struct sig { typedef bool type; };
// Constructor
pred_andF( Pred1T Pred1, Pred2T Pred2 ) :
m_Pred1(Pred1), m_Pred2(Pred2) {}
// Operation
template<typename CharT>
bool operator()( CharT Ch ) const
{
return m_Pred1(Ch) && m_Pred2(Ch);
}
private:
Pred1T m_Pred1;
Pred2T m_Pred2;
};
// class_or composition predicate
template<typename Pred1T, typename Pred2T>
struct pred_orF :
public predicate_facade< pred_orF<Pred1T,Pred2T> >
{
public:
// Boost.Lambda support
template <class Args> struct sig { typedef bool type; };
// Constructor
pred_orF( Pred1T Pred1, Pred2T Pred2 ) :
m_Pred1(Pred1), m_Pred2(Pred2) {}
// Operation
template<typename CharT>
bool operator()( CharT Ch ) const
{
return m_Pred1(Ch) || m_Pred2(Ch);
}
private:
Pred1T m_Pred1;
Pred2T m_Pred2;
};
// class_not composition predicate
template< typename PredT >
struct pred_notF :
public predicate_facade< pred_notF<PredT> >
{
public:
// Boost.Lambda support
template <class Args> struct sig { typedef bool type; };
// Constructor
pred_notF( PredT Pred ) : m_Pred(Pred) {}
// Operation
template<typename CharT>
bool operator()( CharT Ch ) const
{
return !m_Pred(Ch);
}
private:
PredT m_Pred;
};
} // namespace detail
} // namespace algorithm
} // namespace boost
#endif // BOOST_STRING_CLASSIFICATION_DETAIL_HPP