/Src/Dependencies/Boost/boost/algorithm/string/compare.hpp
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- // Boost string_algo library compare.hpp header file -------------------------//
- // Copyright Pavol Droba 2002-2006.
- //
- // Distributed under 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_COMPARE_HPP
- #define BOOST_STRING_COMPARE_HPP
- #include <boost/algorithm/string/config.hpp>
- #include <locale>
- /*! \file
- Defines element comparison predicates. Many algorithms in this library can
- take an additional argument with a predicate used to compare elements.
- This makes it possible, for instance, to have case insensitive versions
- of the algorithms.
- */
- namespace boost {
- namespace algorithm {
- // is_equal functor -----------------------------------------------//
- //! is_equal functor
- /*!
- Standard STL equal_to only handle comparison between arguments
- of the same type. This is a less restrictive version which wraps operator ==.
- */
- struct is_equal
- {
- //! Function operator
- /*!
- Compare two operands for equality
- */
- template< typename T1, typename T2 >
- bool operator()( const T1& Arg1, const T2& Arg2 ) const
- {
- return Arg1==Arg2;
- }
- };
- //! case insensitive version of is_equal
- /*!
- Case insensitive comparison predicate. Comparison is done using
- specified locales.
- */
- struct is_iequal
- {
- //! Constructor
- /*!
- \param Loc locales used for comparison
- */
- is_iequal( const std::locale& Loc=std::locale() ) :
- m_Loc( Loc ) {}
- //! Function operator
- /*!
- Compare two operands. Case is ignored.
- */
- template< typename T1, typename T2 >
- bool operator()( const T1& Arg1, const T2& Arg2 ) const
- {
- #if defined(__BORLANDC__) && (__BORLANDC__ >= 0x560) && (__BORLANDC__ <= 0x564) && !defined(_USE_OLD_RW_STL)
- return std::toupper(Arg1)==std::toupper(Arg2);
- #else
- return std::toupper<T1>(Arg1,m_Loc)==std::toupper<T2>(Arg2,m_Loc);
- #endif
- }
- private:
- std::locale m_Loc;
- };
- // is_less functor -----------------------------------------------//
- //! is_less functor
- /*!
- Convenient version of standard std::less. Operation is templated, therefore it is
- not required to specify the exact types upon the construction
- */
- struct is_less
- {
- //! Functor operation
- /*!
- Compare two operands using > operator
- */
- template< typename T1, typename T2 >
- bool operator()( const T1& Arg1, const T2& Arg2 ) const
- {
- return Arg1<Arg2;
- }
- };
- //! case insensitive version of is_less
- /*!
- Case insensitive comparison predicate. Comparison is done using
- specified locales.
- */
- struct is_iless
- {
- //! Constructor
- /*!
- \param Loc locales used for comparison
- */
- is_iless( const std::locale& Loc=std::locale() ) :
- m_Loc( Loc ) {}
- //! Function operator
- /*!
- Compare two operands. Case is ignored.
- */
- template< typename T1, typename T2 >
- bool operator()( const T1& Arg1, const T2& Arg2 ) const
- {
- #if defined(__BORLANDC__) && (__BORLANDC__ >= 0x560) && (__BORLANDC__ <= 0x564) && !defined(_USE_OLD_RW_STL)
- return std::toupper(Arg1)<std::toupper(Arg2);
- #else
- return std::toupper<T1>(Arg1,m_Loc)<std::toupper<T2>(Arg2,m_Loc);
- #endif
- }
- private:
- std::locale m_Loc;
- };
- // is_not_greater functor -----------------------------------------------//
- //! is_not_greater functor
- /*!
- Convenient version of standard std::not_greater_to. Operation is templated, therefore it is
- not required to specify the exact types upon the construction
- */
- struct is_not_greater
- {
- //! Functor operation
- /*!
- Compare two operands using > operator
- */
- template< typename T1, typename T2 >
- bool operator()( const T1& Arg1, const T2& Arg2 ) const
- {
- return Arg1<=Arg2;
- }
- };
- //! case insensitive version of is_not_greater
- /*!
- Case insensitive comparison predicate. Comparison is done using
- specified locales.
- */
- struct is_not_igreater
- {
- //! Constructor
- /*!
- \param Loc locales used for comparison
- */
- is_not_igreater( const std::locale& Loc=std::locale() ) :
- m_Loc( Loc ) {}
- //! Function operator
- /*!
- Compare two operands. Case is ignored.
- */
- template< typename T1, typename T2 >
- bool operator()( const T1& Arg1, const T2& Arg2 ) const
- {
- #if defined(__BORLANDC__) && (__BORLANDC__ >= 0x560) && (__BORLANDC__ <= 0x564) && !defined(_USE_OLD_RW_STL)
- return std::toupper(Arg1)<=std::toupper(Arg2);
- #else
- return std::toupper<T1>(Arg1,m_Loc)<=std::toupper<T2>(Arg2,m_Loc);
- #endif
- }
- private:
- std::locale m_Loc;
- };
- } // namespace algorithm
- // pull names to the boost namespace
- using algorithm::is_equal;
- using algorithm::is_iequal;
- using algorithm::is_less;
- using algorithm::is_iless;
- using algorithm::is_not_greater;
- using algorithm::is_not_igreater;
- } // namespace boost
- #endif // BOOST_STRING_COMPARE_HPP