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Copy pathregex.hpp
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646 lines (560 loc) · 24.4 KB
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// Boost string_algo library regex.hpp header file ---------------------------//
// Copyright Pavol Droba 2002-2003.
//
// 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_REGEX_HPP
#define BOOST_STRING_REGEX_HPP
#include <boost/algorithm/string/config.hpp>
#include <boost/regex.hpp>
#include <boost/range/iterator_range_core.hpp>
#include <boost/range/begin.hpp>
#include <boost/range/end.hpp>
#include <boost/range/iterator.hpp>
#include <boost/range/as_literal.hpp>
#include <boost/algorithm/string/find_format.hpp>
#include <boost/algorithm/string/regex_find_format.hpp>
#include <boost/algorithm/string/formatter.hpp>
#include <boost/algorithm/string/iter_find.hpp>
/*! \file
Defines regex variants of the algorithms.
*/
namespace boost {
namespace algorithm {
// find_regex -----------------------------------------------//
//! Find regex algorithm
/*!
Search for a substring matching the given regex in the input.
\param Input A container which will be searched.
\param Rx A regular expression
\param Flags Regex options
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c RangeT::iterator or
\c RangeT::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<
typename RangeT,
typename CharT,
typename RegexTraitsT>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<RangeT>::type >
find_regex(
RangeT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
iterator_range<BOOST_STRING_TYPENAME range_iterator<RangeT>::type> lit_input(::boost::as_literal(Input));
return ::boost::algorithm::regex_finder(Rx,Flags)(
::boost::begin(lit_input), ::boost::end(lit_input) );
}
// replace_regex --------------------------------------------------------------------//
//! Replace regex algorithm
/*!
Search for a substring matching given regex and format it with
the specified format.
The result is a modified copy of the input. It is returned as a sequence
or copied to the output iterator.
\param Output An output iterator to which the result will be copied
\param Input An input string
\param Rx A regular expression
\param Format Regex format definition
\param Flags Regex options
\return An output iterator pointing just after the last inserted character or
a modified copy of the input
\note The second variant of this function provides the strong exception-safety guarantee
*/
template<
typename OutputIteratorT,
typename RangeT,
typename CharT,
typename RegexTraitsT,
typename FormatStringTraitsT, typename FormatStringAllocatorT >
inline OutputIteratorT replace_regex_copy(
OutputIteratorT Output,
const RangeT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
match_flag_type Flags=match_default | format_default )
{
return ::boost::algorithm::find_format_copy(
Output,
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::regex_formatter( Format, Flags ) );
}
//! Replace regex algorithm
/*!
\overload
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT,
typename FormatStringTraitsT, typename FormatStringAllocatorT >
inline SequenceT replace_regex_copy(
const SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
match_flag_type Flags=match_default | format_default )
{
return ::boost::algorithm::find_format_copy(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::regex_formatter( Format, Flags ) );
}
//! Replace regex algorithm
/*!
Search for a substring matching given regex and format it with
the specified format. The input string is modified in-place.
\param Input An input string
\param Rx A regular expression
\param Format Regex format definition
\param Flags Regex options
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT,
typename FormatStringTraitsT, typename FormatStringAllocatorT >
inline void replace_regex(
SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
match_flag_type Flags=match_default | format_default )
{
::boost::algorithm::find_format(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::regex_formatter( Format, Flags ) );
}
// replace_all_regex --------------------------------------------------------------------//
//! Replace all regex algorithm
/*!
Format all substrings, matching given regex, with the specified format.
The result is a modified copy of the input. It is returned as a sequence
or copied to the output iterator.
\param Output An output iterator to which the result will be copied
\param Input An input string
\param Rx A regular expression
\param Format Regex format definition
\param Flags Regex options
\return An output iterator pointing just after the last inserted character or
a modified copy of the input
\note The second variant of this function provides the strong exception-safety guarantee
*/
template<
typename OutputIteratorT,
typename RangeT,
typename CharT,
typename RegexTraitsT,
typename FormatStringTraitsT, typename FormatStringAllocatorT >
inline OutputIteratorT replace_all_regex_copy(
OutputIteratorT Output,
const RangeT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
match_flag_type Flags=match_default | format_default )
{
return ::boost::algorithm::find_format_all_copy(
Output,
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::regex_formatter( Format, Flags ) );
}
//! Replace all regex algorithm
/*!
\overload
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT,
typename FormatStringTraitsT, typename FormatStringAllocatorT >
inline SequenceT replace_all_regex_copy(
const SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
match_flag_type Flags=match_default | format_default )
{
return ::boost::algorithm::find_format_all_copy(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::regex_formatter( Format, Flags ) );
}
//! Replace all regex algorithm
/*!
Format all substrings, matching given regex, with the specified format.
The input string is modified in-place.
\param Input An input string
\param Rx A regular expression
\param Format Regex format definition
\param Flags Regex options
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT,
typename FormatStringTraitsT, typename FormatStringAllocatorT >
inline void replace_all_regex(
SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
match_flag_type Flags=match_default | format_default )
{
::boost::algorithm::find_format_all(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::regex_formatter( Format, Flags ) );
}
// erase_regex --------------------------------------------------------------------//
//! Erase regex algorithm
/*!
Remove a substring matching given regex from the input.
The result is a modified copy of the input. It is returned as a sequence
or copied to the output iterator.
\param Output An output iterator to which the result will be copied
\param Input An input string
\param Rx A regular expression
\param Flags Regex options
\return An output iterator pointing just after the last inserted character or
a modified copy of the input
\note The second variant of this function provides the strong exception-safety guarantee
*/
template<
typename OutputIteratorT,
typename RangeT,
typename CharT,
typename RegexTraitsT >
inline OutputIteratorT erase_regex_copy(
OutputIteratorT Output,
const RangeT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
return ::boost::algorithm::find_format_copy(
Output,
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::empty_formatter( Input ) );
}
//! Erase regex algorithm
/*!
\overload
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT >
inline SequenceT erase_regex_copy(
const SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
return ::boost::algorithm::find_format_copy(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::empty_formatter( Input ) );
}
//! Erase regex algorithm
/*!
Remove a substring matching given regex from the input.
The input string is modified in-place.
\param Input An input string
\param Rx A regular expression
\param Flags Regex options
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT >
inline void erase_regex(
SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
::boost::algorithm::find_format(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::empty_formatter( Input ) );
}
// erase_all_regex --------------------------------------------------------------------//
//! Erase all regex algorithm
/*!
Erase all substrings, matching given regex, from the input.
The result is a modified copy of the input. It is returned as a sequence
or copied to the output iterator.
\param Output An output iterator to which the result will be copied
\param Input An input string
\param Rx A regular expression
\param Flags Regex options
\return An output iterator pointing just after the last inserted character or
a modified copy of the input
\note The second variant of this function provides the strong exception-safety guarantee
*/
template<
typename OutputIteratorT,
typename RangeT,
typename CharT,
typename RegexTraitsT >
inline OutputIteratorT erase_all_regex_copy(
OutputIteratorT Output,
const RangeT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
return ::boost::algorithm::find_format_all_copy(
Output,
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::empty_formatter( Input ) );
}
//! Erase all regex algorithm
/*!
\overload
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT >
inline SequenceT erase_all_regex_copy(
const SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
return ::boost::algorithm::find_format_all_copy(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::empty_formatter( Input ) );
}
//! Erase all regex algorithm
/*!
Erase all substrings, matching given regex, from the input.
The input string is modified in-place.
\param Input An input string
\param Rx A regular expression
\param Flags Regex options
*/
template<
typename SequenceT,
typename CharT,
typename RegexTraitsT>
inline void erase_all_regex(
SequenceT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
::boost::algorithm::find_format_all(
Input,
::boost::algorithm::regex_finder( Rx, Flags ),
::boost::algorithm::empty_formatter( Input ) );
}
// find_all_regex ------------------------------------------------------------------//
//! Find all regex algorithm
/*!
This algorithm finds all substrings matching the give regex
in the input.
Each part is copied and added as a new element to the output container.
Thus the result container must be able to hold copies
of the matches (in a compatible structure like std::string) or
a reference to it (e.g. using the iterator range class).
Examples of such a container are \c std::vector<std::string>
or \c std::list<boost::iterator_range<std::string::iterator>>
\param Result A container that can hold copies of references to the substrings.
\param Input A container which will be searched.
\param Rx A regular expression
\param Flags Regex options
\return A reference to the result
\note Prior content of the result will be overwritten.
\note This function provides the strong exception-safety guarantee
*/
template<
typename SequenceSequenceT,
typename RangeT,
typename CharT,
typename RegexTraitsT >
inline SequenceSequenceT& find_all_regex(
SequenceSequenceT& Result,
const RangeT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
return ::boost::algorithm::iter_find(
Result,
Input,
::boost::algorithm::regex_finder(Rx,Flags) );
}
// split_regex ------------------------------------------------------------------//
//! Split regex algorithm
/*!
Tokenize expression. This function is equivalent to C strtok. Input
sequence is split into tokens, separated by separators. Separator
is an every match of the given regex.
Each part is copied and added as a new element to the output container.
Thus the result container must be able to hold copies
of the matches (in a compatible structure like std::string) or
a reference to it (e.g. using the iterator range class).
Examples of such a container are \c std::vector<std::string>
or \c std::list<boost::iterator_range<std::string::iterator>>
\param Result A container that can hold copies of references to the substrings.
\param Input A container which will be searched.
\param Rx A regular expression
\param Flags Regex options
\return A reference to the result
\note Prior content of the result will be overwritten.
\note This function provides the strong exception-safety guarantee
*/
template<
typename SequenceSequenceT,
typename RangeT,
typename CharT,
typename RegexTraitsT >
inline SequenceSequenceT& split_regex(
SequenceSequenceT& Result,
const RangeT& Input,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
return ::boost::algorithm::iter_split(
Result,
Input,
::boost::algorithm::regex_finder(Rx,Flags) );
}
// join_if ------------------------------------------------------------------//
#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
//! Conditional join algorithm
/*!
This algorithm joins all strings in a 'list' into one long string.
Segments are concatenated by given separator. Only segments that
match the given regular expression will be added to the result
This is a specialization of join_if algorithm.
\param Input A container that holds the input strings. It must be a container-of-containers.
\param Separator A string that will separate the joined segments.
\param Rx A regular expression
\param Flags Regex options
\return Concatenated string.
\note This function provides the strong exception-safety guarantee
*/
template<
typename SequenceSequenceT,
typename Range1T,
typename CharT,
typename RegexTraitsT >
inline typename range_value<SequenceSequenceT>::type
join_if(
const SequenceSequenceT& Input,
const Range1T& Separator,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
// Define working types
typedef typename range_value<SequenceSequenceT>::type ResultT;
typedef typename range_const_iterator<SequenceSequenceT>::type InputIteratorT;
// Parse input
InputIteratorT itBegin=::boost::begin(Input);
InputIteratorT itEnd=::boost::end(Input);
// Construct container to hold the result
ResultT Result;
// Roll to the first element that will be added
while(
itBegin!=itEnd &&
!::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags)) ++itBegin;
// Add this element
if(itBegin!=itEnd)
{
detail::insert(Result, ::boost::end(Result), *itBegin);
++itBegin;
}
for(;itBegin!=itEnd; ++itBegin)
{
if(::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags))
{
// Add separator
detail::insert(Result, ::boost::end(Result), ::boost::as_literal(Separator));
// Add element
detail::insert(Result, ::boost::end(Result), *itBegin);
}
}
return Result;
}
#else // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
//! Conditional join algorithm
/*!
This algorithm joins all strings in a 'list' into one long string.
Segments are concatenated by given separator. Only segments that
match the given regular expression will be added to the result
This is a specialization of join_if algorithm.
\param Input A container that holds the input strings. It must be a container-of-containers.
\param Separator A string that will separate the joined segments.
\param Rx A regular expression
\param Flags Regex options
\return Concatenated string.
\note This function provides the strong exception-safety guarantee
*/
template<
typename SequenceSequenceT,
typename Range1T,
typename CharT,
typename RegexTraitsT >
inline typename range_value<SequenceSequenceT>::type
join_if_regex(
const SequenceSequenceT& Input,
const Range1T& Separator,
const basic_regex<CharT, RegexTraitsT>& Rx,
match_flag_type Flags=match_default )
{
// Define working types
typedef typename range_value<SequenceSequenceT>::type ResultT;
typedef typename range_const_iterator<SequenceSequenceT>::type InputIteratorT;
// Parse input
InputIteratorT itBegin=::boost::begin(Input);
InputIteratorT itEnd=::boost::end(Input);
// Construct container to hold the result
ResultT Result;
// Roll to the first element that will be added
while(
itBegin!=itEnd &&
!::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags)) ++itBegin;
// Add this element
if(itBegin!=itEnd)
{
detail::insert(Result, ::boost::end(Result), *itBegin);
++itBegin;
}
for(;itBegin!=itEnd; ++itBegin)
{
if(::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags))
{
// Add separator
detail::insert(Result, ::boost::end(Result), ::boost::as_literal(Separator));
// Add element
detail::insert(Result, ::boost::end(Result), *itBegin);
}
}
return Result;
}
#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
} // namespace algorithm
// pull names into the boost namespace
using algorithm::find_regex;
using algorithm::replace_regex;
using algorithm::replace_regex_copy;
using algorithm::replace_all_regex;
using algorithm::replace_all_regex_copy;
using algorithm::erase_regex;
using algorithm::erase_regex_copy;
using algorithm::erase_all_regex;
using algorithm::erase_all_regex_copy;
using algorithm::find_all_regex;
using algorithm::split_regex;
#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
using algorithm::join_if;
#else // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
using algorithm::join_if_regex;
#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
} // namespace boost
#endif // BOOST_STRING_REGEX_HPP
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