647 lines
25 KiB
C++
647 lines
25 KiB
C++
// 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
|