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// Boost string_algo library classification.hpp header file ---------------------------// |
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// Copyright Pavol Droba 2002-2003. Use, modification and |
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// distribution is subject to the Boost Software License, Version |
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// See http://www.boost.org for updates, documentation, and revision history. |
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#ifndef UTILS_PREDICATE_HPP |
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#define UTILS_PREDICATE_HPP |
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#include <locale> |
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#if defined(__SUNPRO_CC) |
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# define USE_FACET(Type, loc) std::use_facet(loc, static_cast<Type*>(0)) |
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#else |
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# define USE_FACET(Type, loc) std::use_facet< Type >(loc) |
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#endif |
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|
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namespace oopse { |
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template<typename Derived> |
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struct PredFacade{}; |
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struct CharClassification: public PredFacade<CharClassification> { |
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CharClassification(std::ctype_base::mask type, std::locale const & loc = std::locale()) : |
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type_(type), loc_(loc) {} |
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template<typename CharT> |
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bool operator()( CharT c ) const { |
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return USE_FACET(std::ctype<CharT>, loc_).is( type_, c ); |
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} |
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private: |
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const std::ctype_base::mask type_; |
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const std::locale loc_; |
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}; |
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template<typename CharT> |
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struct FromRangeFunctor : public PredFacade< FromRangeFunctor<CharT> > { |
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FromRangeFunctor( CharT from, CharT to ) : from_(from), to_(to) {} |
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template<typename Char2T> |
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bool operator()( Char2T c ) const { |
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return ( from_ <= c ) && ( c <= to_ ); |
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} |
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private: |
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CharT from_; |
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CharT to_; |
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}; |
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template<typename Pred1T, typename Pred2T> |
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struct PredAndFunctor : public PredFacade< PredAndFunctor<Pred1T,Pred2T> > { |
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public: |
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PredAndFunctor( Pred1T pred1, Pred2T pred2 ) : pred1_(pred1), pred2_(pred2) {} |
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template<typename CharT> |
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bool operator()( CharT c ) const { |
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return pred1_(c) && pred2_(c); |
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} |
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private: |
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Pred1T pred1_; |
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Pred2T pred2_; |
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}; |
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template<typename Pred1T, typename Pred2T> |
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struct PredOrFunctor : public PredFacade< PredOrFunctor<Pred1T,Pred2T> > { |
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public: |
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PredOrFunctor( Pred1T pred1, Pred2T pred2 ) : pred1_(pred1), pred2_(pred2) {} |
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template<typename CharT> |
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bool operator()( CharT c ) const { |
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return pred1_(c) || pred2_(c); |
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} |
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private: |
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Pred1T pred1_; |
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Pred2T pred2_; |
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}; |
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template< typename PredT > |
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struct PredNotFunctor : public PredFacade< PredNotFunctor<PredT> > { |
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public: |
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PredNotFunctor( PredT pred ) : pred_(pred) {} |
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template<typename CharT> |
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bool operator()( CharT c ) const { |
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return !pred_(c); |
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} |
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private: |
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PredT pred_; |
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}; |
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inline CharClassification isSpace(const std::locale& loc=std::locale()){ |
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return CharClassification(std::ctype_base::space, loc); |
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} |
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inline CharClassification isAlnum(const std::locale& loc=std::locale()){ |
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return CharClassification(std::ctype_base::alnum, loc); |
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} |
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inline CharClassification isAlpha(const std::locale& loc=std::locale()){ |
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return CharClassification(std::ctype_base::alpha, loc); |
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} |
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inline CharClassification isCntrl(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::cntrl, loc); |
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} |
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inline CharClassification isDigit(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::digit, loc); |
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} |
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inline CharClassification isGraph(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::graph, loc); |
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} |
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inline CharClassification isLower(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::lower, loc); |
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} |
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inline CharClassification isPrint(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::print, loc); |
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} |
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inline CharClassification isPunct(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::punct, loc); |
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} |
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inline CharClassification isUpper(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::upper, loc); |
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} |
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inline CharClassification isXDigit(const std::locale& loc=std::locale()) { |
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return CharClassification(std::ctype_base::xdigit, loc); |
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} |
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template<typename CharT> |
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inline FromRangeFunctor<CharT> isFromRange(CharT from, CharT to) { |
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return FromRangeFunctor<CharT>(from, to); |
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} |
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template<typename Pred1T, typename Pred2T> |
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inline PredAndFunctor<Pred1T, Pred2T> |
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operator&&(const PredFacade<Pred1T>& Pred1, const PredFacade<Pred2T>& Pred2) { |
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// Doing the static_cast with the pointer instead of the reference |
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// is a workaround for some compilers which have problems with |
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// static_cast's of template references, i.e. CW8. /grafik/ |
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return PredAndFunctor<Pred1T,Pred2T>( |
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*static_cast<const Pred1T*>(&Pred1), |
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*static_cast<const Pred2T*>(&Pred2) ); |
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} |
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template<typename Pred1T, typename Pred2T> |
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inline PredOrFunctor<Pred1T, Pred2T> |
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operator||( const PredFacade<Pred1T>& Pred1, const PredFacade<Pred2T>& Pred2 ) { |
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// Doing the static_cast with the pointer instead of the reference |
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// is a workaround for some compilers which have problems with |
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// static_cast's of template references, i.e. CW8. /grafik/ |
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return PredOrFunctor<Pred1T,Pred2T>( |
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*static_cast<const Pred1T*>(&Pred1), |
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*static_cast<const Pred2T*>(&Pred2)); |
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} |
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template<typename PredT> |
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inline PredNotFunctor<PredT> |
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operator!( const PredFacade<PredT>& Pred ) { |
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// Doing the static_cast with the pointer instead of the reference |
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// is a workaround for some compilers which have problems with |
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// static_cast's of template references, i.e. CW8. /grafik/ |
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return PredNotFunctor<PredT>(*static_cast<const PredT*>(&Pred)); |
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} |
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} |
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|
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#endif |
