271 lines
9.6 KiB
C++
271 lines
9.6 KiB
C++
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// Boost string_algo library finder.hpp header file ---------------------------//
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// Copyright Pavol Droba 2002-2006.
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (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 BOOST_STRING_FINDER_HPP
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#define BOOST_STRING_FINDER_HPP
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#include <boost/algorithm/string/config.hpp>
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#include <boost/range/iterator_range_core.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/range/iterator.hpp>
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#include <boost/range/const_iterator.hpp>
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#include <boost/algorithm/string/constants.hpp>
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#include <boost/algorithm/string/detail/finder.hpp>
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#include <boost/algorithm/string/compare.hpp>
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/*! \file
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Defines Finder generators. Finder object is a functor which is able to
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find a substring matching a specific criteria in the input.
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Finders are used as a pluggable components for replace, find
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and split facilities. This header contains generator functions
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for finders provided in this library.
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*/
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namespace boost {
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namespace algorithm {
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// Finder generators ------------------------------------------//
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//! "First" finder
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/*!
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Construct the \c first_finder. The finder searches for the first
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occurrence of the string in a given input.
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The result is given as an \c iterator_range delimiting the match.
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\param Search A substring to be searched for.
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\param Comp An element comparison predicate
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\return An instance of the \c first_finder object
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*/
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template<typename RangeT>
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inline detail::first_finderF<
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BOOST_STRING_TYPENAME range_const_iterator<RangeT>::type,
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is_equal>
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first_finder( const RangeT& Search )
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{
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return
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detail::first_finderF<
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BOOST_STRING_TYPENAME
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range_const_iterator<RangeT>::type,
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is_equal>( ::boost::as_literal(Search), is_equal() ) ;
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}
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//! "First" finder
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/*!
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\overload
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*/
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template<typename RangeT,typename PredicateT>
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inline detail::first_finderF<
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BOOST_STRING_TYPENAME range_const_iterator<RangeT>::type,
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PredicateT>
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first_finder(
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const RangeT& Search, PredicateT Comp )
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{
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return
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detail::first_finderF<
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BOOST_STRING_TYPENAME
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range_const_iterator<RangeT>::type,
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PredicateT>( ::boost::as_literal(Search), Comp );
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}
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//! "Last" finder
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/*!
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Construct the \c last_finder. The finder searches for the last
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occurrence of the string in a given input.
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The result is given as an \c iterator_range delimiting the match.
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\param Search A substring to be searched for.
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\param Comp An element comparison predicate
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\return An instance of the \c last_finder object
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*/
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template<typename RangeT>
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inline detail::last_finderF<
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BOOST_STRING_TYPENAME range_const_iterator<RangeT>::type,
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is_equal>
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last_finder( const RangeT& Search )
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{
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return
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detail::last_finderF<
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BOOST_STRING_TYPENAME
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range_const_iterator<RangeT>::type,
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is_equal>( ::boost::as_literal(Search), is_equal() );
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}
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//! "Last" finder
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/*!
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\overload
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*/
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template<typename RangeT, typename PredicateT>
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inline detail::last_finderF<
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BOOST_STRING_TYPENAME range_const_iterator<RangeT>::type,
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PredicateT>
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last_finder( const RangeT& Search, PredicateT Comp )
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{
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return
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detail::last_finderF<
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BOOST_STRING_TYPENAME
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range_const_iterator<RangeT>::type,
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PredicateT>( ::boost::as_literal(Search), Comp ) ;
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}
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//! "Nth" finder
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/*!
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Construct the \c nth_finder. The finder searches for the n-th (zero-indexed)
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occurrence of the string in a given input.
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The result is given as an \c iterator_range delimiting the match.
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\param Search A substring to be searched for.
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\param Nth An index of the match to be find
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\param Comp An element comparison predicate
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\return An instance of the \c nth_finder object
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*/
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template<typename RangeT>
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inline detail::nth_finderF<
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BOOST_STRING_TYPENAME range_const_iterator<RangeT>::type,
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is_equal>
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nth_finder(
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const RangeT& Search,
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int Nth)
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{
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return
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detail::nth_finderF<
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BOOST_STRING_TYPENAME
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range_const_iterator<RangeT>::type,
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is_equal>( ::boost::as_literal(Search), Nth, is_equal() ) ;
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}
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//! "Nth" finder
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/*!
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\overload
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*/
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template<typename RangeT, typename PredicateT>
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inline detail::nth_finderF<
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BOOST_STRING_TYPENAME range_const_iterator<RangeT>::type,
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PredicateT>
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nth_finder(
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const RangeT& Search,
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int Nth,
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PredicateT Comp )
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{
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return
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detail::nth_finderF<
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BOOST_STRING_TYPENAME
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range_const_iterator<RangeT>::type,
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PredicateT>( ::boost::as_literal(Search), Nth, Comp );
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}
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//! "Head" finder
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/*!
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Construct the \c head_finder. The finder returns a head of a given
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input. The head is a prefix of a string up to n elements in
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size. If an input has less then n elements, whole input is
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considered a head.
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The result is given as an \c iterator_range delimiting the match.
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\param N The size of the head
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\return An instance of the \c head_finder object
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*/
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inline detail::head_finderF
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head_finder( int N )
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{
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return detail::head_finderF(N);
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}
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//! "Tail" finder
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/*!
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Construct the \c tail_finder. The finder returns a tail of a given
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input. The tail is a suffix of a string up to n elements in
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size. If an input has less then n elements, whole input is
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considered a head.
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The result is given as an \c iterator_range delimiting the match.
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\param N The size of the head
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\return An instance of the \c tail_finder object
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*/
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inline detail::tail_finderF
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tail_finder( int N )
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{
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return detail::tail_finderF(N);
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}
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//! "Token" finder
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/*!
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Construct the \c token_finder. The finder searches for a token
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specified by a predicate. It is similar to std::find_if
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algorithm, with an exception that it return a range of
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instead of a single iterator.
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If "compress token mode" is enabled, adjacent matching tokens are
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concatenated into one match. Thus the finder can be used to
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search for continuous segments of characters satisfying the
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given predicate.
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The result is given as an \c iterator_range delimiting the match.
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\param Pred An element selection predicate
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\param eCompress Compress flag
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\return An instance of the \c token_finder object
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*/
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template< typename PredicateT >
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inline detail::token_finderF<PredicateT>
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token_finder(
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PredicateT Pred,
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token_compress_mode_type eCompress=token_compress_off )
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{
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return detail::token_finderF<PredicateT>( Pred, eCompress );
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}
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//! "Range" finder
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/*!
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Construct the \c range_finder. The finder does not perform
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any operation. It simply returns the given range for
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any input.
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\param Begin Beginning of the range
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\param End End of the range
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\param Range The range.
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\return An instance of the \c range_finger object
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*/
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template< typename ForwardIteratorT >
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inline detail::range_finderF<ForwardIteratorT>
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range_finder(
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ForwardIteratorT Begin,
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ForwardIteratorT End )
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{
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return detail::range_finderF<ForwardIteratorT>( Begin, End );
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}
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//! "Range" finder
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/*!
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\overload
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*/
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template< typename ForwardIteratorT >
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inline detail::range_finderF<ForwardIteratorT>
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range_finder( iterator_range<ForwardIteratorT> Range )
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{
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return detail::range_finderF<ForwardIteratorT>( Range );
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}
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} // namespace algorithm
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// pull the names to the boost namespace
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using algorithm::first_finder;
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using algorithm::last_finder;
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using algorithm::nth_finder;
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using algorithm::head_finder;
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using algorithm::tail_finder;
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using algorithm::token_finder;
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using algorithm::range_finder;
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} // namespace boost
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#endif // BOOST_STRING_FINDER_HPP
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