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// class template regex -*- C++ -*-
// Copyright (C) 2010, 2011 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/**
* @file bits/regex.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{regex}
*/
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
/**
* @defgroup regex Regular Expressions
* A facility for performing regular expression pattern matching.
*/
//@{
// [7.7] Class regex_traits
/**
* @brief Describes aspects of a regular expression.
*
* A regular expression traits class that satisfies the requirements of
* section [28.7].
*
* The class %regex is parameterized around a set of related types and
* functions used to complete the definition of its semantics. This class
* satisfies the requirements of such a traits class.
*/
template<typename _Ch_type>
struct regex_traits
{
public:
typedef _Ch_type char_type;
typedef std::basic_string<char_type> string_type;
typedef std::locale locale_type;
typedef std::ctype_base::mask char_class_type;
public:
/**
* @brief Constructs a default traits object.
*/
regex_traits()
{ }
/**
* @brief Gives the length of a C-style string starting at @p __p.
*
* @param __p a pointer to the start of a character sequence.
*
* @returns the number of characters between @p *__p and the first
* default-initialized value of type @p char_type. In other words, uses
* the C-string algorithm for determining the length of a sequence of
* characters.
*/
static std::size_t
length(const char_type* __p)
{ return string_type::traits_type::length(__p); }
/**
* @brief Performs the identity translation.
*
* @param c A character to the locale-specific character set.
*
* @returns c.
*/
char_type
translate(char_type __c) const
{ return __c; }
/**
* @brief Translates a character into a case-insensitive equivalent.
*
* @param c A character to the locale-specific character set.
*
* @returns the locale-specific lower-case equivalent of c.
* @throws std::bad_cast if the imbued locale does not support the ctype
* facet.
*/
char_type
translate_nocase(char_type __c) const
{
using std::ctype;
using std::use_facet;
return use_facet<ctype<char_type> >(_M_locale).tolower(__c);
}
/**
* @brief Gets a sort key for a character sequence.
*
* @param first beginning of the character sequence.
* @param last one-past-the-end of the character sequence.
*
* Returns a sort key for the character sequence designated by the
* iterator range [F1, F2) such that if the character sequence [G1, G2)
* sorts before the character sequence [H1, H2) then
* v.transform(G1, G2) < v.transform(H1, H2).
*
* What this really does is provide a more efficient way to compare a
* string to multiple other strings in locales with fancy collation
* rules and equivalence classes.
*
* @returns a locale-specific sort key equivalent to the input range.
*
* @throws std::bad_cast if the current locale does not have a collate
* facet.
*/
template<typename _Fwd_iter>
string_type
transform(_Fwd_iter __first, _Fwd_iter __last) const
{
using std::collate;
using std::use_facet;
const collate<_Ch_type>& __c(use_facet<
collate<_Ch_type> >(_M_locale));
string_type __s(__first, __last);
return __c.transform(__s.data(), __s.data() + __s.size());
}
/**
* @brief Gets a sort key for a character sequence, independant of case.
*
* @param first beginning of the character sequence.
* @param last one-past-the-end of the character sequence.
*
* Effects: if typeid(use_facet<collate<_Ch_type> >) ==
* typeid(collate_byname<_Ch_type>) and the form of the sort key
* returned by collate_byname<_Ch_type>::transform(first, last) is known
* and can be converted into a primary sort key then returns that key,
* otherwise returns an empty string.
*
* @todo Implement this function.
*/
template<typename _Fwd_iter>
string_type
transform_primary(_Fwd_iter __first, _Fwd_iter __last) const
{ return string_type(); }
/**
* @brief Gets a collation element by name.
*
* @param first beginning of the collation element name.
* @param last one-past-the-end of the collation element name.
*
* @returns a sequence of one or more characters that represents the
* collating element consisting of the character sequence designated by
* the iterator range [first, last). Returns an empty string if the
* character sequence is not a valid collating element.
*
* @todo Implement this function.
*/
template<typename _Fwd_iter>
string_type
lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const
{ return string_type(); }
/**
* @brief Maps one or more characters to a named character
* classification.
*
* @param first beginning of the character sequence.
* @param last one-past-the-end of the character sequence.
* @param icase ignores the case of the classification name.
*
* @returns an unspecified value that represents the character
* classification named by the character sequence designated by the
* iterator range [first, last). If @p icase is true, the returned mask
* identifies the classification regardless of the case of the characters
* to be matched (for example, [[:lower:]] is the same as [[:alpha:]]),
* otherwise a case-dependant classification is returned. The value
* returned shall be independent of the case of the characters in the
* character sequence. If the name is not recognized then returns a value
* that compares equal to 0.
*
* At least the following names (or their wide-character equivalent) are
* supported.
* - d
* - w
* - s
* - alnum
* - alpha
* - blank
* - cntrl
* - digit
* - graph
* - lower
* - print
* - punct
* - space
* - upper
* - xdigit
*
* @todo Implement this function.
*/
template<typename _Fwd_iter>
char_class_type
lookup_classname(_Fwd_iter __first, _Fwd_iter __last,
bool __icase = false) const
{ return 0; }
/**
* @brief Determines if @p c is a member of an identified class.
*
* @param c a character.
* @param f a class type (as returned from lookup_classname).
*
* @returns true if the character @p c is a member of the classification
* represented by @p f, false otherwise.
*
* @throws std::bad_cast if the current locale does not have a ctype
* facet.
*/
bool
isctype(_Ch_type __c, char_class_type __f) const;
/**
* @brief Converts a digit to an int.
*
* @param ch a character representing a digit.
* @param radix the radix if the numeric conversion (limited to 8, 10,
* or 16).
*
* @returns the value represented by the digit ch in base radix if the
* character ch is a valid digit in base radix; otherwise returns -1.
*/
int
value(_Ch_type __ch, int __radix) const;
/**
* @brief Imbues the regex_traits object with a copy of a new locale.
*
* @param loc A locale.
*
* @returns a copy of the previous locale in use by the regex_traits
* object.
*
* @note Calling imbue with a different locale than the one currently in
* use invalidates all cached data held by *this.
*/
locale_type
imbue(locale_type __loc)
{
std::swap(_M_locale, __loc);
return __loc;
}
/**
* @brief Gets a copy of the current locale in use by the regex_traits
* object.
*/
locale_type
getloc() const
{ return _M_locale; }
protected:
locale_type _M_locale;
};
template<typename _Ch_type>
bool
regex_traits<_Ch_type>::
isctype(_Ch_type __c, char_class_type __f) const
{
using std::ctype;
using std::use_facet;
const ctype<_Ch_type>& __ctype(use_facet<
ctype<_Ch_type> >(_M_locale));
if (__ctype.is(__f, __c))
return true;
// special case of underscore in [[:w:]]
if (__c == __ctype.widen('_'))
{
const char __wb[] = "w";
char_class_type __wt = this->lookup_classname(__wb,
__wb + sizeof(__wb));
if (__f | __wt)
return true;
}
// special case of [[:space:]] in [[:blank:]]
if (__ctype.is(std::ctype_base::space, __c))
{
const char __bb[] = "blank";
char_class_type __bt = this->lookup_classname(__bb,
__bb + sizeof(__bb));
if (__f | __bt)
return true;
}
return false;
}
template<typename _Ch_type>
int
regex_traits<_Ch_type>::
value(_Ch_type __ch, int __radix) const
{
std::basic_istringstream<_Ch_type> __is(string_type(1, __ch));
int __v;
if (__radix == 8)
__is >> std::oct;
else if (__radix == 16)
__is >> std::hex;
__is >> __v;
return __is.fail() ? -1 : __v;
}
// [7.8] Class basic_regex
/**
* Objects of specializations of this class represent regular expressions
* constructed from sequences of character type @p _Ch_type.
*
* Storage for the regular expression is allocated and deallocated as
* necessary by the member functions of this class.
*/
template<typename _Ch_type, typename _Rx_traits = regex_traits<_Ch_type> >
class basic_regex
{
public:
// types:
typedef _Ch_type value_type;
typedef _Rx_traits traits_type;
typedef typename traits_type::string_type string_type;
typedef regex_constants::syntax_option_type flag_type;
typedef typename traits_type::locale_type locale_type;
/**
* @name Constants
* std [28.8.1](1)
*/
//@{
static constexpr regex_constants::syntax_option_type icase
= regex_constants::icase;
static constexpr regex_constants::syntax_option_type nosubs
= regex_constants::nosubs;
static constexpr regex_constants::syntax_option_type optimize
= regex_constants::optimize;
static constexpr regex_constants::syntax_option_type collate
= regex_constants::collate;
static constexpr regex_constants::syntax_option_type ECMAScript
= regex_constants::ECMAScript;
static constexpr regex_constants::syntax_option_type basic
= regex_constants::basic;
static constexpr regex_constants::syntax_option_type extended
= regex_constants::extended;
static constexpr regex_constants::syntax_option_type awk
= regex_constants::awk;
static constexpr regex_constants::syntax_option_type grep
= regex_constants::grep;
static constexpr regex_constants::syntax_option_type egrep
= regex_constants::egrep;
//@}
// [7.8.2] construct/copy/destroy
/**
* Constructs a basic regular expression that does not match any
* character sequence.
*/
basic_regex()
: _M_flags(regex_constants::ECMAScript),
_M_automaton(__regex::__compile<const _Ch_type*, _Rx_traits>(0, 0,
_M_traits, _M_flags))
{ }
/**
* @brief Constructs a basic regular expression from the sequence
* [p, p + char_traits<_Ch_type>::length(p)) interpreted according to the
* flags in @p f.
*
* @param p A pointer to the start of a C-style null-terminated string
* containing a regular expression.
* @param f Flags indicating the syntax rules and options.
*
* @throws regex_error if @p p is not a valid regular expression.
*/
explicit
basic_regex(const _Ch_type* __p,
flag_type __f = regex_constants::ECMAScript)
: _M_flags(__f),
_M_automaton(__regex::__compile(__p, __p + _Rx_traits::length(__p),
_M_traits, _M_flags))
{ }
/**
* @brief Constructs a basic regular expression from the sequence
* [p, p + len) interpreted according to the flags in @p f.
*
* @param p A pointer to the start of a string containing a regular
* expression.
* @param len The length of the string containing the regular expression.
* @param f Flags indicating the syntax rules and options.
*
* @throws regex_error if @p p is not a valid regular expression.
*/
basic_regex(const _Ch_type* __p, std::size_t __len, flag_type __f)
: _M_flags(__f),
_M_automaton(__regex::__compile(__p, __p + __len, _M_traits, _M_flags))
{ }
/**
* @brief Copy-constructs a basic regular expression.
*
* @param rhs A @p regex object.
*/
basic_regex(const basic_regex& __rhs)
: _M_flags(__rhs._M_flags), _M_traits(__rhs._M_traits),
_M_automaton(__rhs._M_automaton)
{ }
/**
* @brief Move-constructs a basic regular expression.
*
* @param rhs A @p regex object.
*/
basic_regex(const basic_regex&& __rhs) noexcept
: _M_flags(__rhs._M_flags), _M_traits(__rhs._M_traits),
_M_automaton(std::move(__rhs._M_automaton))
{ }
/**
* @brief Constructs a basic regular expression from the string
* @p s interpreted according to the flags in @p f.
*
* @param s A string containing a regular expression.
* @param f Flags indicating the syntax rules and options.
*
* @throws regex_error if @p s is not a valid regular expression.
*/
template<typename _Ch_traits, typename _Ch_alloc>
explicit
basic_regex(const std::basic_string<_Ch_type, _Ch_traits,
_Ch_alloc>& __s,
flag_type __f = regex_constants::ECMAScript)
: _M_flags(__f),
_M_automaton(__regex::__compile(__s.begin(), __s.end(),
_M_traits, _M_flags))
{ }
/**
* @brief Constructs a basic regular expression from the range
* [first, last) interpreted according to the flags in @p f.
*
* @param first The start of a range containing a valid regular
* expression.
* @param last The end of a range containing a valid regular
* expression.
* @param f The format flags of the regular expression.
*
* @throws regex_error if @p [first, last) is not a valid regular
* expression.
*/
template<typename _InputIterator>
basic_regex(_InputIterator __first, _InputIterator __last,
flag_type __f = regex_constants::ECMAScript)
: _M_flags(__f),
_M_automaton(__regex::__compile(__first, __last, _M_traits, _M_flags))
{ }
/**
* @brief Constructs a basic regular expression from an initializer list.
*
* @param l The initializer list.
* @param f The format flags of the regular expression.
*
* @throws regex_error if @p l is not a valid regular expression.
*/
basic_regex(initializer_list<_Ch_type> __l,
flag_type __f = regex_constants::ECMAScript)
: _M_flags(__f),
_M_automaton(__regex::__compile(__l.begin(), __l.end(),
_M_traits, _M_flags))
{ }
/**
* @brief Destroys a basic regular expression.
*/
~basic_regex()
{ }
/**
* @brief Assigns one regular expression to another.
*/
basic_regex&
operator=(const basic_regex& __rhs)
{ return this->assign(__rhs); }
/**
* @brief Move-assigns one regular expression to another.
*/
basic_regex&
operator=(basic_regex&& __rhs) noexcept
{ return this->assign(std::move(__rhs)); }
/**
* @brief Replaces a regular expression with a new one constructed from
* a C-style null-terminated string.
*
* @param A pointer to the start of a null-terminated C-style string
* containing a regular expression.
*/
basic_regex&
operator=(const _Ch_type* __p)
{ return this->assign(__p, flags()); }
/**
* @brief Replaces a regular expression with a new one constructed from
* a string.
*
* @param A pointer to a string containing a regular expression.
*/
template<typename _Ch_typeraits, typename _Allocator>
basic_regex&
operator=(const basic_string<_Ch_type, _Ch_typeraits, _Allocator>& __s)
{ return this->assign(__s, flags()); }
// [7.8.3] assign
/**
* @brief the real assignment operator.
*
* @param rhs Another regular expression object.
*/
basic_regex&
assign(const basic_regex& __rhs)
{
basic_regex __tmp(__rhs);
this->swap(__tmp);
return *this;
}
/**
* @brief The move-assignment operator.
*
* @param rhs Another regular expression object.
*/
basic_regex&
assign(basic_regex&& __rhs) noexcept
{
basic_regex __tmp(std::move(__rhs));
this->swap(__tmp);
return *this;
}
/**
* @brief Assigns a new regular expression to a regex object from a
* C-style null-terminated string containing a regular expression
* pattern.
*
* @param p A pointer to a C-style null-terminated string containing
* a regular expression pattern.
* @param flags Syntax option flags.
*
* @throws regex_error if p does not contain a valid regular expression
* pattern interpreted according to @p flags. If regex_error is thrown,
* *this remains unchanged.
*/
basic_regex&
assign(const _Ch_type* __p,
flag_type __flags = regex_constants::ECMAScript)
{ return this->assign(string_type(__p), __flags); }
/**
* @brief Assigns a new regular expression to a regex object from a
* C-style string containing a regular expression pattern.
*
* @param p A pointer to a C-style string containing a
* regular expression pattern.
* @param len The length of the regular expression pattern string.
* @param flags Syntax option flags.
*
* @throws regex_error if p does not contain a valid regular expression
* pattern interpreted according to @p flags. If regex_error is thrown,
* *this remains unchanged.
*/
basic_regex&
assign(const _Ch_type* __p, std::size_t __len, flag_type __flags)
{ return this->assign(string_type(__p, __len), __flags); }
/**
* @brief Assigns a new regular expression to a regex object from a
* string containing a regular expression pattern.
*
* @param s A string containing a regular expression pattern.
* @param flags Syntax option flags.
*
* @throws regex_error if p does not contain a valid regular expression
* pattern interpreted according to @p flags. If regex_error is thrown,
* *this remains unchanged.
*/
template<typename _Ch_typeraits, typename _Allocator>
basic_regex&
assign(const basic_string<_Ch_type, _Ch_typeraits, _Allocator>& __s,
flag_type __f = regex_constants::ECMAScript)
{
basic_regex __tmp(__s, __f);
this->swap(__tmp);
return *this;
}
/**
* @brief Assigns a new regular expression to a regex object.
*
* @param first The start of a range containing a valid regular
* expression.
* @param last The end of a range containing a valid regular
* expression.
* @param flags Syntax option flags.
*
* @throws regex_error if p does not contain a valid regular expression
* pattern interpreted according to @p flags. If regex_error is thrown,
* the object remains unchanged.
*/
template<typename _InputIterator>
basic_regex&
assign(_InputIterator __first, _InputIterator __last,
flag_type __flags = regex_constants::ECMAScript)
{ return this->assign(string_type(__first, __last), __flags); }
/**
* @brief Assigns a new regular expression to a regex object.
*
* @param l An initializer list representing a regular expression.
* @param flags Syntax option flags.
*
* @throws regex_error if @p l does not contain a valid regular
* expression pattern interpreted according to @p flags. If regex_error
* is thrown, the object remains unchanged.
*/
basic_regex&
assign(initializer_list<_Ch_type> __l,
flag_type __f = regex_constants::ECMAScript)
{ return this->assign(__l.begin(), __l.end(), __f); }
// [7.8.4] const operations
/**
* @brief Gets the number of marked subexpressions within the regular
* expression.
*/
unsigned int
mark_count() const
{ return _M_automaton->_M_sub_count() - 1; }
/**
* @brief Gets the flags used to construct the regular expression
* or in the last call to assign().
*/
flag_type
flags() const
{ return _M_flags; }
// [7.8.5] locale
/**
* @brief Imbues the regular expression object with the given locale.
*
* @param loc A locale.
*/
locale_type
imbue(locale_type __loc)
{ return _M_traits.imbue(__loc); }
/**
* @brief Gets the locale currently imbued in the regular expression
* object.
*/
locale_type
getloc() const
{ return _M_traits.getloc(); }
// [7.8.6] swap
/**
* @brief Swaps the contents of two regular expression objects.
*
* @param rhs Another regular expression object.
*/
void
swap(basic_regex& __rhs)
{
std::swap(_M_flags, __rhs._M_flags);
std::swap(_M_traits, __rhs._M_traits);
std::swap(_M_automaton, __rhs._M_automaton);
}
#ifdef _GLIBCXX_DEBUG
void
_M_dot(std::ostream& __ostr)
{ _M_automaton->_M_dot(__ostr); }
#endif
const __regex::_AutomatonPtr&
_M_get_automaton() const
{ return _M_automaton; }
protected:
flag_type _M_flags;
_Rx_traits _M_traits;
__regex::_AutomatonPtr _M_automaton;
};
/** @brief Standard regular expressions. */
typedef basic_regex<char> regex;
#ifdef _GLIBCXX_USE_WCHAR_T
/** @brief Standard wide-character regular expressions. */
typedef basic_regex<wchar_t> wregex;
#endif
// [7.8.6] basic_regex swap
/**
* @brief Swaps the contents of two regular expression objects.
* @param lhs First regular expression.
* @param rhs Second regular expression.
*/
template<typename _Ch_type, typename _Rx_traits>
inline void
swap(basic_regex<_Ch_type, _Rx_traits>& __lhs,
basic_regex<_Ch_type, _Rx_traits>& __rhs)
{ __lhs.swap(__rhs); }
// [7.9] Class template sub_match
/**
* A sequence of characters matched by a particular marked sub-expression.
*
* An object of this class is essentially a pair of iterators marking a
* matched subexpression within a regular expression pattern match. Such
* objects can be converted to and compared with std::basic_string objects
* of a similar base character type as the pattern matched by the regular
* expression.
*
* The iterators that make up the pair are the usual half-open interval
* referencing the actual original pattern matched.
*/
template<typename _BiIter>
class sub_match : public std::pair<_BiIter, _BiIter>
{
public:
typedef typename iterator_traits<_BiIter>::value_type value_type;
typedef typename iterator_traits<_BiIter>::difference_type
difference_type;
typedef _BiIter iterator;
typedef std::basic_string<value_type> string_type;
public:
bool matched;
constexpr sub_match() : matched() { }
/**
* Gets the length of the matching sequence.
*/
difference_type
length() const
{ return this->matched ? std::distance(this->first, this->second) : 0; }
/**
* @brief Gets the matching sequence as a string.
*
* @returns the matching sequence as a string.
*
* This is the implicit conversion operator. It is identical to the
* str() member function except that it will want to pop up in
* unexpected places and cause a great deal of confusion and cursing
* from the unwary.
*/
operator string_type() const
{
return this->matched
? string_type(this->first, this->second)
: string_type();
}
/**
* @brief Gets the matching sequence as a string.
*
* @returns the matching sequence as a string.
*/
string_type
str() const
{
return this->matched
? string_type(this->first, this->second)
: string_type();
}
/**
* @brief Compares this and another matched sequence.
*
* @param s Another matched sequence to compare to this one.
*
* @retval <0 this matched sequence will collate before @p s.
* @retval =0 this matched sequence is equivalent to @p s.
* @retval <0 this matched sequence will collate after @p s.
*/
int
compare(const sub_match& __s) const
{ return this->str().compare(__s.str()); }
/**
* @brief Compares this sub_match to a string.
*
* @param s A string to compare to this sub_match.
*
* @retval <0 this matched sequence will collate before @p s.
* @retval =0 this matched sequence is equivalent to @p s.
* @retval <0 this matched sequence will collate after @p s.
*/
int
compare(const string_type& __s) const
{ return this->str().compare(__s); }
/**
* @brief Compares this sub_match to a C-style string.
*
* @param s A C-style string to compare to this sub_match.
*
* @retval <0 this matched sequence will collate before @p s.
* @retval =0 this matched sequence is equivalent to @p s.
* @retval <0 this matched sequence will collate after @p s.
*/
int
compare(const value_type* __s) const
{ return this->str().compare(__s); }
};
/** @brief Standard regex submatch over a C-style null-terminated string. */
typedef sub_match<const char*> csub_match;
/** @brief Standard regex submatch over a standard string. */
typedef sub_match<string::const_iterator> ssub_match;
#ifdef _GLIBCXX_USE_WCHAR_T
/** @brief Regex submatch over a C-style null-terminated wide string. */
typedef sub_match<const wchar_t*> wcsub_match;
/** @brief Regex submatch over a standard wide string. */
typedef sub_match<wstring::const_iterator> wssub_match;
#endif
// [7.9.2] sub_match non-member operators
/**
* @brief Tests the equivalence of two regular expression submatches.
* @param lhs First regular expression submatch.
* @param rhs Second regular expression submatch.
* @returns true if @a lhs is equivalent to @a rhs, false otherwise.
*/
template<typename _BiIter>
inline bool
operator==(const sub_match<_BiIter>& __lhs,
const sub_match<_BiIter>& __rhs)
{ return __lhs.compare(__rhs) == 0; }
/**
* @brief Tests the inequivalence of two regular expression submatches.
* @param lhs First regular expression submatch.
* @param rhs Second regular expression submatch.
* @returns true if @a lhs is not equivalent to @a rhs, false otherwise.
*/
template<typename _BiIter>
inline bool
operator!=(const sub_match<_BiIter>& __lhs,
const sub_match<_BiIter>& __rhs)
{ return __lhs.compare(__rhs) != 0; }
/**
* @brief Tests the ordering of two regular expression submatches.
* @param lhs First regular expression submatch.
* @param rhs Second regular expression submatch.
* @returns true if @a lhs precedes @a rhs, false otherwise.
*/
template<typename _BiIter>
inline bool
operator<(const sub_match<_BiIter>& __lhs,
const sub_match<_BiIter>& __rhs)
{ return __lhs.compare(__rhs) < 0; }
/**
* @brief Tests the ordering of two regular expression submatches.
* @param lhs First regular expression submatch.
* @param rhs Second regular expression submatch.
* @returns true if @a lhs does not succeed @a rhs, false otherwise.
*/
template<typename _BiIter>
inline bool
operator<=(const sub_match<_BiIter>& __lhs,
const sub_match<_BiIter>& __rhs)
{ return __lhs.compare(__rhs) <= 0; }
/**
* @brief Tests the ordering of two regular expression submatches.
* @param lhs First regular expression submatch.
* @param rhs Second regular expression submatch.
* @returns true if @a lhs does not precede @a rhs, false otherwise.
*/
template<typename _BiIter>
inline bool
operator>=(const sub_match<_BiIter>& __lhs,
const sub_match<_BiIter>& __rhs)
{ return __lhs.compare(__rhs) >= 0; }
/**
* @brief Tests the ordering of two regular expression submatches.
* @param lhs First regular expression submatch.
* @param rhs Second regular expression submatch.
* @returns true if @a lhs succeeds @a rhs, false otherwise.
*/
template<typename _BiIter>
inline bool
operator>(const sub_match<_BiIter>& __lhs,
const sub_match<_BiIter>& __rhs)
{ return __lhs.compare(__rhs) > 0; }
/**
* @brief Tests the equivalence of a string and a regular expression
* submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs is equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator==(const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return __rhs.compare(__lhs.c_str()) == 0; }
/**
* @brief Tests the inequivalence of a string and a regular expression
* submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs is not equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator!=(const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __lhs, const sub_match<_Bi_iter>& __rhs)
{ return !(__lhs == __rhs); }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs precedes @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator<(const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __lhs, const sub_match<_Bi_iter>& __rhs)
{ return __rhs.compare(__lhs.c_str()) > 0; }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs succeeds @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator>(const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __lhs, const sub_match<_Bi_iter>& __rhs)
{ return __rhs < __lhs; }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs does not precede @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator>=(const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __lhs, const sub_match<_Bi_iter>& __rhs)
{ return !(__lhs < __rhs); }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs does not succeed @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator<=(const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __lhs, const sub_match<_Bi_iter>& __rhs)
{ return !(__rhs < __lhs); }
/**
* @brief Tests the equivalence of a regular expression submatch and a
* string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs is equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator==(const sub_match<_Bi_iter>& __lhs,
const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __rhs)
{ return __lhs.compare(__rhs.c_str()) == 0; }
/**
* @brief Tests the inequivalence of a regular expression submatch and a
* string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs is not equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
inline bool
operator!=(const sub_match<_Bi_iter>& __lhs,
const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __rhs)
{ return !(__lhs == __rhs); }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs precedes @a rhs, false otherwise.
*/
template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
inline bool
operator<(const sub_match<_Bi_iter>& __lhs,
const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __rhs)
{ return __lhs.compare(__rhs.c_str()) < 0; }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs succeeds @a rhs, false otherwise.
*/
template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
inline bool
operator>(const sub_match<_Bi_iter>& __lhs,
const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __rhs)
{ return __rhs < __lhs; }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs does not precede @a rhs, false otherwise.
*/
template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
inline bool
operator>=(const sub_match<_Bi_iter>& __lhs,
const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __rhs)
{ return !(__lhs < __rhs); }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs does not succeed @a rhs, false otherwise.
*/
template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
inline bool
operator<=(const sub_match<_Bi_iter>& __lhs,
const basic_string<
typename iterator_traits<_Bi_iter>::value_type,
_Ch_traits, _Ch_alloc>& __rhs)
{ return !(__rhs < __lhs); }
/**
* @brief Tests the equivalence of a C string and a regular expression
* submatch.
* @param lhs A C string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs is equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return __rhs.compare(__lhs) == 0; }
/**
* @brief Tests the inequivalence of an iterator value and a regular
* expression submatch.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs is not equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return !(__lhs == __rhs); }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs precedes @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return __rhs.compare(__lhs) > 0; }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs succeeds @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return __rhs < __lhs; }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs does not precede @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return !(__lhs < __rhs); }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs does not succeed @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return !(__rhs < __lhs); }
/**
* @brief Tests the equivalence of a regular expression submatch and a
* string.
* @param lhs A regular expression submatch.
* @param rhs A pointer to a string?
* @returns true if @a lhs is equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator==(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const* __rhs)
{ return __lhs.compare(__rhs) == 0; }
/**
* @brief Tests the inequivalence of a regular expression submatch and a
* string.
* @param lhs A regular expression submatch.
* @param rhs A pointer to a string.
* @returns true if @a lhs is not equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator!=(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const* __rhs)
{ return !(__lhs == __rhs); }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs precedes @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const* __rhs)
{ return __lhs.compare(__rhs) < 0; }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs succeeds @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const* __rhs)
{ return __rhs < __lhs; }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs does not precede @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>=(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const* __rhs)
{ return !(__lhs < __rhs); }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A string.
* @returns true if @a lhs does not succeed @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<=(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const* __rhs)
{ return !(__rhs < __lhs); }
/**
* @brief Tests the equivalence of a string and a regular expression
* submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs is equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator==(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
const sub_match<_Bi_iter>& __rhs)
{
return __rhs.compare(typename sub_match<_Bi_iter>::string_type(1, __lhs))
== 0;
}
/**
* @brief Tests the inequivalence of a string and a regular expression
* submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs is not equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return !(__lhs == __rhs); }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs precedes @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
const sub_match<_Bi_iter>& __rhs)
{
return __rhs.compare(typename sub_match<_Bi_iter>::string_type(1, __lhs))
> 0;
}
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs succeeds @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return __rhs < __lhs; }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs does not precede @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return !(__lhs < __rhs); }
/**
* @brief Tests the ordering of a string and a regular expression submatch.
* @param lhs A string.
* @param rhs A regular expression submatch.
* @returns true if @a lhs does not succeed @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
const sub_match<_Bi_iter>& __rhs)
{ return !(__rhs < __lhs); }
/**
* @brief Tests the equivalence of a regular expression submatch and a
* string.
* @param lhs A regular expression submatch.
* @param rhs A const string reference.
* @returns true if @a lhs is equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator==(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const& __rhs)
{
return __lhs.compare(typename sub_match<_Bi_iter>::string_type(1, __rhs))
== 0;
}
/**
* @brief Tests the inequivalence of a regular expression submatch and a
* string.
* @param lhs A regular expression submatch.
* @param rhs A const string reference.
* @returns true if @a lhs is not equivalent to @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator!=(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const& __rhs)
{ return !(__lhs == __rhs); }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A const string reference.
* @returns true if @a lhs precedes @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const& __rhs)
{
return __lhs.compare(typename sub_match<_Bi_iter>::string_type(1, __rhs))
< 0;
}
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A const string reference.
* @returns true if @a lhs succeeds @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const& __rhs)
{ return __rhs < __lhs; }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A const string reference.
* @returns true if @a lhs does not precede @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator>=(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const& __rhs)
{ return !(__lhs < __rhs); }
/**
* @brief Tests the ordering of a regular expression submatch and a string.
* @param lhs A regular expression submatch.
* @param rhs A const string reference.
* @returns true if @a lhs does not succeed @a rhs, false otherwise.
*/
template<typename _Bi_iter>
inline bool
operator<=(const sub_match<_Bi_iter>& __lhs,
typename iterator_traits<_Bi_iter>::value_type const& __rhs)
{ return !(__rhs < __lhs); }
/**
* @brief Inserts a matched string into an output stream.
*
* @param os The output stream.
* @param m A submatch string.
*
* @returns the output stream with the submatch string inserted.
*/
template<typename _Ch_type, typename _Ch_traits, typename _Bi_iter>
inline
basic_ostream<_Ch_type, _Ch_traits>&
operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
const sub_match<_Bi_iter>& __m)
{ return __os << __m.str(); }
// [7.10] Class template match_results
/*
* Special sub_match object representing an unmatched sub-expression.
*/
template<typename _Bi_iter>
inline const sub_match<_Bi_iter>&
__unmatched_sub()
{
static const sub_match<_Bi_iter> __unmatched = sub_match<_Bi_iter>();
return __unmatched;
}
/**
* @brief The results of a match or search operation.
*
* A collection of character sequences representing the result of a regular
* expression match. Storage for the collection is allocated and freed as
* necessary by the member functions of class template match_results.
*
* This class satisfies the Sequence requirements, with the exception that
* only the operations defined for a const-qualified Sequence are supported.
*
* The sub_match object stored at index 0 represents sub-expression 0, i.e.
* the whole match. In this case the %sub_match member matched is always true.
* The sub_match object stored at index n denotes what matched the marked
* sub-expression n within the matched expression. If the sub-expression n
* participated in a regular expression match then the %sub_match member
* matched evaluates to true, and members first and second denote the range
* of characters [first, second) which formed that match. Otherwise matched
* is false, and members first and second point to the end of the sequence
* that was searched.
*
* @nosubgrouping
*/
template<typename _Bi_iter,
typename _Allocator = allocator<sub_match<_Bi_iter> > >
class match_results
: private std::vector<sub_match<_Bi_iter>, _Allocator>
{
private:
/*
* The vector base is empty if this does not represent a successful match.
* Otherwise it contains n+3 elements where n is the number of marked
* sub-expressions:
* [0] entire match
* [1] 1st marked subexpression
* ...
* [n] nth marked subexpression
* [n+1] prefix
* [n+2] suffix
*/
typedef std::vector<sub_match<_Bi_iter>, _Allocator> _Base_type;
public:
/**
* @name 10.? Public Types
*/
//@{
typedef sub_match<_Bi_iter> value_type;
typedef const value_type& const_reference;
typedef const_reference reference;
typedef typename _Base_type::const_iterator const_iterator;
typedef const_iterator iterator;
typedef typename std::iterator_traits<_Bi_iter>::difference_type
difference_type;
/* TODO: needs allocator_traits */
typedef typename _Allocator::size_type size_type;
typedef _Allocator allocator_type;
typedef typename std::iterator_traits<_Bi_iter>::value_type
char_type;
typedef std::basic_string<char_type> string_type;
//@}
public:
/**
* @name 28.10.1 Construction, Copying, and Destruction
*/
//@{
/**
* @brief Constructs a default %match_results container.
* @post size() returns 0 and str() returns an empty string.
*/
explicit
match_results(const _Allocator& __a = _Allocator())
: _Base_type(__a)
{ }
/**
* @brief Copy constructs a %match_results.
*/
match_results(const match_results& __rhs)
: _Base_type(__rhs)
{ }
/**
* @brief Move constructs a %match_results.
*/
match_results(match_results&& __rhs) noexcept
: _Base_type(std::move(__rhs))
{ }
/**
* @brief Assigns rhs to *this.
*/
match_results&
operator=(const match_results& __rhs)
{
match_results(__rhs).swap(*this);
return *this;
}
/**
* @brief Move-assigns rhs to *this.
*/
match_results&
operator=(match_results&& __rhs)
{
match_results(std::move(__rhs)).swap(*this);
return *this;
}
/**
* @brief Destroys a %match_results object.
*/
~match_results()
{ }
//@}
// 28.10.2, state:
/**
* @brief Indicates if the %match_results is ready.
* @retval true The object has a fully-established result state.
* @retval false The object is not ready.
*/
bool ready() const { return !_Base_type::empty(); }
/**
* @name 28.10.2 Size
*/
//@{
/**
* @brief Gets the number of matches and submatches.
*
* The number of matches for a given regular expression will be either 0
* if there was no match or mark_count() + 1 if a match was successful.
* Some matches may be empty.
*
* @returns the number of matches found.
*/
size_type
size() const
{
size_type __size = _Base_type::size();
return (__size && _Base_type::operator[](0).matched) ? __size - 2 : 0;
}
size_type
max_size() const
{ return _Base_type::max_size(); }
/**
* @brief Indicates if the %match_results contains no results.
* @retval true The %match_results object is empty.
* @retval false The %match_results object is not empty.
*/
bool
empty() const
{ return size() == 0; }
//@}
/**
* @name 10.3 Element Access
*/
//@{
/**
* @brief Gets the length of the indicated submatch.
* @param sub indicates the submatch.
* @pre ready() == true
*
* This function returns the length of the indicated submatch, or the
* length of the entire match if @p sub is zero (the default).
*/
difference_type
length(size_type __sub = 0) const
{ return (*this)[__sub].length(); }
/**
* @brief Gets the offset of the beginning of the indicated submatch.
* @param sub indicates the submatch.
* @pre ready() == true
*
* This function returns the offset from the beginning of the target
* sequence to the beginning of the submatch, unless the value of @p sub
* is zero (the default), in which case this function returns the offset
* from the beginning of the target sequence to the beginning of the
* match.
*
* Returns -1 if @p sub is out of range.
*/
difference_type
position(size_type __sub = 0) const
{
return __sub < size() ? std::distance(this->prefix().first,
(*this)[__sub].first) : -1;
}
/**
* @brief Gets the match or submatch converted to a string type.
* @param sub indicates the submatch.
* @pre ready() == true
*
* This function gets the submatch (or match, if @p sub is zero) extracted
* from the target range and converted to the associated string type.
*/
string_type
str(size_type __sub = 0) const
{ return (*this)[__sub].str(); }
/**
* @brief Gets a %sub_match reference for the match or submatch.
* @param sub indicates the submatch.
* @pre ready() == true
*
* This function gets a reference to the indicated submatch, or the entire
* match if @p sub is zero.
*
* If @p sub >= size() then this function returns a %sub_match with a
* special value indicating no submatch.
*/
const_reference
operator[](size_type __sub) const
{
_GLIBCXX_DEBUG_ASSERT( ready() );
return __sub < size()
? _Base_type::operator[](__sub)
: __unmatched_sub<_Bi_iter>();
}
/**
* @brief Gets a %sub_match representing the match prefix.
* @pre ready() == true
*
* This function gets a reference to a %sub_match object representing the
* part of the target range between the start of the target range and the
* start of the match.
*/
const_reference
prefix() const
{
_GLIBCXX_DEBUG_ASSERT( ready() );
return !empty()
? _Base_type::operator[](_Base_type::size() - 2)
: __unmatched_sub<_Bi_iter>();
}
/**
* @brief Gets a %sub_match representing the match suffix.
* @pre ready() == true
*
* This function gets a reference to a %sub_match object representing the
* part of the target range between the end of the match and the end of
* the target range.
*/
const_reference
suffix() const
{
_GLIBCXX_DEBUG_ASSERT( ready() );
return !empty()
? _Base_type::operator[](_Base_type::size() - 1)
: __unmatched_sub<_Bi_iter>();
}
/**
* @brief Gets an iterator to the start of the %sub_match collection.
*/
const_iterator
begin() const
{ return _Base_type::begin(); }
/**
* @brief Gets an iterator to the start of the %sub_match collection.
*/
const_iterator
cbegin() const
{ return _Base_type::cbegin(); }
/**
* @brief Gets an iterator to one-past-the-end of the collection.
*/
const_iterator
end() const
{ return !empty() ? _Base_type::end() - 2 : _Base_type::end(); }
/**
* @brief Gets an iterator to one-past-the-end of the collection.
*/
const_iterator
cend() const
{ return end(); }
//@}
/**
* @name 10.4 Formatting
*
* These functions perform formatted substitution of the matched
* character sequences into their target. The format specifiers and
* escape sequences accepted by these functions are determined by
* their @p flags parameter as documented above.
*/
//@{
/**
* @pre ready() == true
* @todo Implement this function.
*/
template<typename _Out_iter>
_Out_iter
format(_Out_iter __out, const char_type* __fmt_first,
const char_type* __fmt_last,
regex_constants::match_flag_type __flags
= regex_constants::format_default) const
{ return __out; }
/**
* @pre ready() == true
*/
template<typename _Out_iter, typename _St, typename _Sa>
_Out_iter
format(_Out_iter __out, const basic_string<char_type, _St, _Sa>& __fmt,
regex_constants::match_flag_type __flags
= regex_constants::format_default) const
{
return format(__out, __fmt.data(), __fmt.data() + __fmt.size(),
__flags);
}
/**
* @pre ready() == true
*/
template<typename _Out_iter, typename _St, typename _Sa>
basic_string<char_type, _St, _Sa>
format(const basic_string<char_type, _St, _Sa>& __fmt,
regex_constants::match_flag_type __flags
= regex_constants::format_default) const
{
basic_string<char_type, _St, _Sa> __result;
format(std::back_inserter(__result), __fmt, __flags);
return __result;
}
/**
* @pre ready() == true
*/
string_type
format(const char_type* __fmt,
regex_constants::match_flag_type __flags
= regex_constants::format_default) const
{
string_type __result;
format(std::back_inserter(__result),
__fmt + char_traits<char_type>::length(__fmt),
__flags);
return __result;
}
//@}
/**
* @name 10.5 Allocator
*/
//@{
/**
* @brief Gets a copy of the allocator.
*/
allocator_type
get_allocator() const
{ return _Base_type::get_allocator(); }
//@}
/**
* @name 10.6 Swap
*/
//@{
/**
* @brief Swaps the contents of two match_results.
*/
void
swap(match_results& __that)
{ _Base_type::swap(__that); }
//@}
private:
friend class __regex::_SpecializedResults<_Bi_iter, _Allocator>;
};
typedef match_results<const char*> cmatch;
typedef match_results<string::const_iterator> smatch;
#ifdef _GLIBCXX_USE_WCHAR_T
typedef match_results<const wchar_t*> wcmatch;
typedef match_results<wstring::const_iterator> wsmatch;
#endif
// match_results comparisons
/**
* @brief Compares two match_results for equality.
* @returns true if the two objects refer to the same match,
* false otherwise.
*/
template<typename _Bi_iter, typename _Allocator>
inline bool
operator==(const match_results<_Bi_iter, _Allocator>& __m1,
const match_results<_Bi_iter, _Allocator>& __m2)
{
if (__m1.ready() != __m2.ready())
return false;
if (!__m1.ready()) // both are not ready
return true;
if (__m1.empty() != __m2.empty())
return false;
if (__m1.empty()) // both are empty
return true;
return __m1.prefix() == __m2.prefix()
&& __m1.size() == __m2.size()
&& std::equal(__m1.begin(), __m1.end(), __m2.begin())
&& __m1.suffix() == __m2.suffix();
}
/**
* @brief Compares two match_results for inequality.
* @returns true if the two objects do not refer to the same match,
* false otherwise.
*/
template<typename _Bi_iter, class _Allocator>
inline bool
operator!=(const match_results<_Bi_iter, _Allocator>& __m1,
const match_results<_Bi_iter, _Allocator>& __m2)
{ return !(__m1 == __m2); }
// [7.10.6] match_results swap
/**
* @brief Swaps two match results.
* @param lhs A match result.
* @param rhs A match result.
*
* The contents of the two match_results objects are swapped.
*/
template<typename _Bi_iter, typename _Allocator>
inline void
swap(match_results<_Bi_iter, _Allocator>& __lhs,
match_results<_Bi_iter, _Allocator>& __rhs)
{ __lhs.swap(__rhs); }
// [7.11.2] Function template regex_match
/**
* @name Matching, Searching, and Replacing
*/
//@{
/**
* @brief Determines if there is a match between the regular expression @p e
* and all of the character sequence [first, last).
*
* @param s Start of the character sequence to match.
* @param e One-past-the-end of the character sequence to match.
* @param m The match results.
* @param re The regular expression.
* @param flags Controls how the regular expression is matched.
*
* @retval true A match exists.
* @retval false Otherwise.
*
* @throws an exception of type regex_error.
*
* @todo Implement this function.
*/
template<typename _Bi_iter, typename _Allocator,
typename _Ch_type, typename _Rx_traits>
bool
regex_match(_Bi_iter __s,
_Bi_iter __e,
match_results<_Bi_iter, _Allocator>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{
__regex::_AutomatonPtr __a = __re._M_get_automaton();
__regex::_Automaton::_SizeT __sz = __a->_M_sub_count();
__regex::_SpecializedCursor<_Bi_iter> __cs(__s, __e);
__regex::_SpecializedResults<_Bi_iter, _Allocator> __r(__sz, __cs, __m);
__regex::_Grep_matcher __matcher(__cs, __r, __a, __flags);
return __m[0].matched;
}
/**
* @brief Indicates if there is a match between the regular expression @p e
* and all of the character sequence [first, last).
*
* @param first Beginning of the character sequence to match.
* @param last One-past-the-end of the character sequence to match.
* @param re The regular expression.
* @param flags Controls how the regular expression is matched.
*
* @retval true A match exists.
* @retval false Otherwise.
*
* @throws an exception of type regex_error.
*/
template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
bool
regex_match(_Bi_iter __first, _Bi_iter __last,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{
match_results<_Bi_iter> __what;
return regex_match(__first, __last, __what, __re, __flags);
}
/**
* @brief Determines if there is a match between the regular expression @p e
* and a C-style null-terminated string.
*
* @param s The C-style null-terminated string to match.
* @param m The match results.
* @param re The regular expression.
* @param f Controls how the regular expression is matched.
*
* @retval true A match exists.
* @retval false Otherwise.
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_type, typename _Allocator, typename _Rx_traits>
inline bool
regex_match(const _Ch_type* __s,
match_results<const _Ch_type*, _Allocator>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __f
= regex_constants::match_default)
{ return regex_match(__s, __s + _Rx_traits::length(__s), __m, __re, __f); }
/**
* @brief Determines if there is a match between the regular expression @p e
* and a string.
*
* @param s The string to match.
* @param m The match results.
* @param re The regular expression.
* @param flags Controls how the regular expression is matched.
*
* @retval true A match exists.
* @retval false Otherwise.
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_traits, typename _Ch_alloc,
typename _Allocator, typename _Ch_type, typename _Rx_traits>
inline bool
regex_match(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>& __s,
match_results<typename basic_string<_Ch_type,
_Ch_traits, _Ch_alloc>::const_iterator, _Allocator>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{ return regex_match(__s.begin(), __s.end(), __m, __re, __flags); }
/**
* @brief Indicates if there is a match between the regular expression @p e
* and a C-style null-terminated string.
*
* @param s The C-style null-terminated string to match.
* @param re The regular expression.
* @param f Controls how the regular expression is matched.
*
* @retval true A match exists.
* @retval false Otherwise.
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_type, class _Rx_traits>
inline bool
regex_match(const _Ch_type* __s,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __f
= regex_constants::match_default)
{ return regex_match(__s, __s + _Rx_traits::length(__s), __re, __f); }
/**
* @brief Indicates if there is a match between the regular expression @p e
* and a string.
*
* @param s [IN] The string to match.
* @param re [IN] The regular expression.
* @param flags [IN] Controls how the regular expression is matched.
*
* @retval true A match exists.
* @retval false Otherwise.
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_traits, typename _Str_allocator,
typename _Ch_type, typename _Rx_traits>
inline bool
regex_match(const basic_string<_Ch_type, _Ch_traits, _Str_allocator>& __s,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{ return regex_match(__s.begin(), __s.end(), __re, __flags); }
// [7.11.3] Function template regex_search
/**
* Searches for a regular expression within a range.
* @param first [IN] The start of the string to search.
* @param last [IN] One-past-the-end of the string to search.
* @param m [OUT] The match results.
* @param re [IN] The regular expression to search for.
* @param flags [IN] Search policy flags.
* @retval true A match was found within the string.
* @retval false No match was found within the string, the content of %m is
* undefined.
*
* @throws an exception of type regex_error.
*
* @todo Implement this function.
*/
template<typename _Bi_iter, typename _Allocator,
typename _Ch_type, typename _Rx_traits>
inline bool
regex_search(_Bi_iter __first, _Bi_iter __last,
match_results<_Bi_iter, _Allocator>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{ return false; }
/**
* Searches for a regular expression within a range.
* @param first [IN] The start of the string to search.
* @param last [IN] One-past-the-end of the string to search.
* @param re [IN] The regular expression to search for.
* @param flags [IN] Search policy flags.
* @retval true A match was found within the string.
* @retval false No match was found within the string.
* @doctodo
*
* @throws an exception of type regex_error.
*/
template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
inline bool
regex_search(_Bi_iter __first, _Bi_iter __last,
const basic_regex<_Ch_type, _Rx_traits>& __re,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{
match_results<_Bi_iter> __what;
return regex_search(__first, __last, __what, __re, __flags);
}
/**
* @brief Searches for a regular expression within a C-string.
* @param s [IN] A C-string to search for the regex.
* @param m [OUT] The set of regex matches.
* @param e [IN] The regex to search for in @p s.
* @param f [IN] The search flags.
* @retval true A match was found within the string.
* @retval false No match was found within the string, the content of %m is
* undefined.
* @doctodo
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_type, class _Allocator, class _Rx_traits>
inline bool
regex_search(const _Ch_type* __s,
match_results<const _Ch_type*, _Allocator>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __e,
regex_constants::match_flag_type __f
= regex_constants::match_default)
{ return regex_search(__s, __s + _Rx_traits::length(__s), __m, __e, __f); }
/**
* @brief Searches for a regular expression within a C-string.
* @param s [IN] The C-string to search.
* @param e [IN] The regular expression to search for.
* @param f [IN] Search policy flags.
* @retval true A match was found within the string.
* @retval false No match was found within the string.
* @doctodo
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_type, typename _Rx_traits>
inline bool
regex_search(const _Ch_type* __s,
const basic_regex<_Ch_type, _Rx_traits>& __e,
regex_constants::match_flag_type __f
= regex_constants::match_default)
{ return regex_search(__s, __s + _Rx_traits::length(__s), __e, __f); }
/**
* @brief Searches for a regular expression within a string.
* @param s [IN] The string to search.
* @param e [IN] The regular expression to search for.
* @param flags [IN] Search policy flags.
* @retval true A match was found within the string.
* @retval false No match was found within the string.
* @doctodo
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_traits, typename _String_allocator,
typename _Ch_type, typename _Rx_traits>
inline bool
regex_search(const basic_string<_Ch_type, _Ch_traits,
_String_allocator>& __s,
const basic_regex<_Ch_type, _Rx_traits>& __e,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{ return regex_search(__s.begin(), __s.end(), __e, __flags); }
/**
* @brief Searches for a regular expression within a string.
* @param s [IN] A C++ string to search for the regex.
* @param m [OUT] The set of regex matches.
* @param e [IN] The regex to search for in @p s.
* @param f [IN] The search flags.
* @retval true A match was found within the string.
* @retval false No match was found within the string, the content of %m is
* undefined.
*
* @throws an exception of type regex_error.
*/
template<typename _Ch_traits, typename _Ch_alloc,
typename _Allocator, typename _Ch_type,
typename _Rx_traits>
inline bool
regex_search(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>& __s,
match_results<typename basic_string<_Ch_type,
_Ch_traits, _Ch_alloc>::const_iterator, _Allocator>& __m,
const basic_regex<_Ch_type, _Rx_traits>& __e,
regex_constants::match_flag_type __f
= regex_constants::match_default)
{ return regex_search(__s.begin(), __s.end(), __m, __e, __f); }
// std [28.11.4] Function template regex_replace
/**
* @doctodo
* @param out
* @param first
* @param last
* @param e
* @param fmt
* @param flags
*
* @returns out
* @throws an exception of type regex_error.
*
* @todo Implement this function.
*/
template<typename _Out_iter, typename _Bi_iter,
typename _Rx_traits, typename _Ch_type>
inline _Out_iter
regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last,
const basic_regex<_Ch_type, _Rx_traits>& __e,
const basic_string<_Ch_type>& __fmt,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{ return __out; }
/**
* @doctodo
* @param s
* @param e
* @param fmt
* @param flags
*
* @returns a copy of string @p s with replacements.
*
* @throws an exception of type regex_error.
*/
template<typename _Rx_traits, typename _Ch_type>
inline basic_string<_Ch_type>
regex_replace(const basic_string<_Ch_type>& __s,
const basic_regex<_Ch_type, _Rx_traits>& __e,
const basic_string<_Ch_type>& __fmt,
regex_constants::match_flag_type __flags
= regex_constants::match_default)
{
basic_string<_Ch_type> __result;
regex_replace(std::back_inserter(__result),
__s.begin(), __s.end(), __e, __fmt, __flags);
return __result;
}
//@}
// std [28.12] Class template regex_iterator
/**
* An iterator adaptor that will provide repeated calls of regex_search over
* a range until no more matches remain.
*/
template<typename _Bi_iter,
typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type,
typename _Rx_traits = regex_traits<_Ch_type> >
class regex_iterator
{
public:
typedef basic_regex<_Ch_type, _Rx_traits> regex_type;
typedef match_results<_Bi_iter> value_type;
typedef std::ptrdiff_t difference_type;
typedef const value_type* pointer;
typedef const value_type& reference;
typedef std::forward_iterator_tag iterator_category;
public:
/**
* @brief Provides a singular iterator, useful for indicating
* one-past-the-end of a range.
* @todo Implement this function.
* @doctodo
*/
regex_iterator();
/**
* Constructs a %regex_iterator...
* @param a [IN] The start of a text range to search.
* @param b [IN] One-past-the-end of the text range to search.
* @param re [IN] The regular expression to match.
* @param m [IN] Policy flags for match rules.
* @todo Implement this function.
* @doctodo
*/
regex_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re,
regex_constants::match_flag_type __m
= regex_constants::match_default);
/**
* Copy constructs a %regex_iterator.
* @todo Implement this function.
* @doctodo
*/
regex_iterator(const regex_iterator& __rhs);
/**
* @todo Implement this function.
* @doctodo
*/
regex_iterator&
operator=(const regex_iterator& __rhs);
/**
* @todo Implement this function.
* @doctodo
*/
bool
operator==(const regex_iterator& __rhs);
/**
* @todo Implement this function.
* @doctodo
*/
bool
operator!=(const regex_iterator& __rhs);
/**
* @todo Implement this function.
* @doctodo
*/
const value_type&
operator*();
/**
* @todo Implement this function.
* @doctodo
*/
const value_type*
operator->();
/**
* @todo Implement this function.
* @doctodo
*/
regex_iterator&
operator++();
/**
* @todo Implement this function.
* @doctodo
*/
regex_iterator
operator++(int);
private:
// these members are shown for exposition only:
_Bi_iter begin;
_Bi_iter end;
const regex_type* pregex;
regex_constants::match_flag_type flags;
match_results<_Bi_iter> match;
};
typedef regex_iterator<const char*> cregex_iterator;
typedef regex_iterator<string::const_iterator> sregex_iterator;
#ifdef _GLIBCXX_USE_WCHAR_T
typedef regex_iterator<const wchar_t*> wcregex_iterator;
typedef regex_iterator<wstring::const_iterator> wsregex_iterator;
#endif
// [7.12.2] Class template regex_token_iterator
/**
* Iterates over submatches in a range (or @a splits a text string).
*
* The purpose of this iterator is to enumerate all, or all specified,
* matches of a regular expression within a text range. The dereferenced
* value of an iterator of this class is a std::sub_match object.
*/
template<typename _Bi_iter,
typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type,
typename _Rx_traits = regex_traits<_Ch_type> >
class regex_token_iterator
{
public:
typedef basic_regex<_Ch_type, _Rx_traits> regex_type;
typedef sub_match<_Bi_iter> value_type;
typedef std::ptrdiff_t difference_type;
typedef const value_type* pointer;
typedef const value_type& reference;
typedef std::forward_iterator_tag iterator_category;
public:
/**
* @brief Default constructs a %regex_token_iterator.
* @todo Implement this function.
*
* A default-constructed %regex_token_iterator is a singular iterator
* that will compare equal to the one-past-the-end value for any
* iterator of the same type.
*/
regex_token_iterator();
/**
* Constructs a %regex_token_iterator...
* @param a [IN] The start of the text to search.
* @param b [IN] One-past-the-end of the text to search.
* @param re [IN] The regular expression to search for.
* @param submatch [IN] Which submatch to return. There are some
* special values for this parameter:
* - -1 each enumerated subexpression does NOT
* match the regular expression (aka field
* splitting)
* - 0 the entire string matching the
* subexpression is returned for each match
* within the text.
* - >0 enumerates only the indicated
* subexpression from a match within the text.
* @param m [IN] Policy flags for match rules.
*
* @todo Implement this function.
* @doctodo
*/
regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re,
int __submatch = 0,
regex_constants::match_flag_type __m
= regex_constants::match_default);
/**
* Constructs a %regex_token_iterator...
* @param a [IN] The start of the text to search.
* @param b [IN] One-past-the-end of the text to search.
* @param re [IN] The regular expression to search for.
* @param submatches [IN] A list of subexpressions to return for each
* regular expression match within the text.
* @param m [IN] Policy flags for match rules.
*
* @todo Implement this function.
* @doctodo
*/
regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
const regex_type& __re,
const std::vector<int>& __submatches,
regex_constants::match_flag_type __m
= regex_constants::match_default);
/**
* Constructs a %regex_token_iterator...
* @param a [IN] The start of the text to search.
* @param b [IN] One-past-the-end of the text to search.
* @param re [IN] The regular expression to search for.
* @param submatches [IN] A list of subexpressions to return for each
* regular expression match within the text.
* @param m [IN] Policy flags for match rules.
* @todo Implement this function.
* @doctodo
*/
template<std::size_t _Nm>
regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
const regex_type& __re,
const int (&__submatches)[_Nm],
regex_constants::match_flag_type __m
= regex_constants::match_default);
/**
* @brief Copy constructs a %regex_token_iterator.
* @param rhs [IN] A %regex_token_iterator to copy.
* @todo Implement this function.
*/
regex_token_iterator(const regex_token_iterator& __rhs);
/**
* @brief Assigns a %regex_token_iterator to another.
* @param rhs [IN] A %regex_token_iterator to copy.
* @todo Implement this function.
*/
regex_token_iterator&
operator=(const regex_token_iterator& __rhs);
/**
* @brief Compares a %regex_token_iterator to another for equality.
* @todo Implement this function.
*/
bool
operator==(const regex_token_iterator& __rhs);
/**
* @brief Compares a %regex_token_iterator to another for inequality.
* @todo Implement this function.
*/
bool
operator!=(const regex_token_iterator& __rhs);
/**
* @brief Dereferences a %regex_token_iterator.
* @todo Implement this function.
*/
const value_type&
operator*();
/**
* @brief Selects a %regex_token_iterator member.
* @todo Implement this function.
*/
const value_type*
operator->();
/**
* @brief Increments a %regex_token_iterator.
* @todo Implement this function.
*/
regex_token_iterator&
operator++();
/**
* @brief Postincrements a %regex_token_iterator.
* @todo Implement this function.
*/
regex_token_iterator
operator++(int);
private: // data members for exposition only:
typedef regex_iterator<_Bi_iter, _Ch_type, _Rx_traits> position_iterator;
position_iterator __position;
const value_type* __result;
value_type __suffix;
std::size_t __n;
std::vector<int> __subs;
};
/** @brief Token iterator for C-style NULL-terminated strings. */
typedef regex_token_iterator<const char*> cregex_token_iterator;
/** @brief Token iterator for standard strings. */
typedef regex_token_iterator<string::const_iterator> sregex_token_iterator;
#ifdef _GLIBCXX_USE_WCHAR_T
/** @brief Token iterator for C-style NULL-terminated wide strings. */
typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator;
/** @brief Token iterator for standard wide-character strings. */
typedef regex_token_iterator<wstring::const_iterator> wsregex_token_iterator;
#endif
//@} // group regex
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace