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find_head/tail_impl functions reordered to avoid dependancy problems

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[SVN r32893]
This commit is contained in:
Pavol Droba
2006-02-13 13:21:31 +00:00
parent e2b9172f5d
commit 3766cbbe5c
1 changed files with 79 additions and 76 deletions
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155
include/boost/algorithm/string/detail/finder.hpp
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@ -331,7 +331,7 @@ namespace boost {
PredicateT m_Comp;
};
// find head functor -----------------------------------------------//
// find head/tail implementation helpers ---------------------------//
template<typename ForwardIteratorT>
iterator_range<ForwardIteratorT>
@ -383,6 +383,84 @@ namespace boost {
return find_head_impl( Begin, End, N, category() );
}
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N,
std::forward_iterator_tag )
{
typedef ForwardIteratorT input_iterator_type;
typedef iterator_range<ForwardIteratorT> result_type;
unsigned int Index=0;
input_iterator_type It=Begin;
input_iterator_type It2=Begin;
// Advance It2 by N increments
for( Index=0; Index<N && It2!=End; ++Index,++It2 ) {};
// Advance It, It2 to the end
for(; It2!=End; ++It,++It2 ) {};
return result_type( It, It2 );
}
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N,
std::bidirectional_iterator_tag )
{
typedef ForwardIteratorT input_iterator_type;
typedef iterator_range<ForwardIteratorT> result_type;
input_iterator_type It=End;
for(
unsigned int Index=0;
Index<N && It!=Begin; ++Index,--It ) {};
return result_type( It, End );
}
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N,
std::random_access_iterator_tag )
{
typedef ForwardIteratorT input_iterator_type;
typedef iterator_range<ForwardIteratorT> result_type;
if ( (End<=Begin) || ( static_cast<unsigned int>(End-Begin) < N ) )
return result_type( Begin, End );
return result_type( End-N, End );
}
// Operation
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N )
{
typedef BOOST_STRING_TYPENAME boost::detail::
iterator_traits<ForwardIteratorT>::iterator_category category;
return find_tail_impl( Begin, End, N, category() );
}
// find head functor -----------------------------------------------//
// find a head in the sequence ( functor )
/*
@ -422,81 +500,6 @@ namespace boost {
// find tail functor -----------------------------------------------//
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N,
std::forward_iterator_tag )
{
typedef ForwardIteratorT input_iterator_type;
typedef iterator_range<ForwardIteratorT> result_type;
unsigned int Index=0;
input_iterator_type It=Begin;
input_iterator_type It2=Begin;
// Advance It2 by N increments
for( Index=0; Index<N && It2!=End; ++Index,++It2 ) {};
// Advance It, It2 to the end
for(; It2!=End; ++It,++It2 ) {};
return result_type( It, It2 );
}
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N,
std::bidirectional_iterator_tag )
{
typedef ForwardIteratorT input_iterator_type;
typedef iterator_range<ForwardIteratorT> result_type;
input_iterator_type It=End;
for(
unsigned int Index=0;
Index<N && It!=Begin; ++Index,--It ) {};
return result_type( It, End );
}
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N,
std::random_access_iterator_tag )
{
typedef ForwardIteratorT input_iterator_type;
typedef iterator_range<ForwardIteratorT> result_type;
if ( (End<=Begin) || ( static_cast<unsigned int>(End-Begin) < N ) )
return result_type( Begin, End );
return result_type( End-N, End );
}
// Operation
template< typename ForwardIteratorT >
iterator_range<ForwardIteratorT>
find_tail_impl(
ForwardIteratorT Begin,
ForwardIteratorT End,
unsigned int N )
{
typedef BOOST_STRING_TYPENAME boost::detail::
iterator_traits<ForwardIteratorT>::iterator_category category;
return find_tail_impl( Begin, End, N, category() );
}
// find a tail in the sequence ( functor )
/*
This functor find a tail of the specified range. For