Provided by: libstdc++-10-doc_10.4.0-5ubuntu2_all 
NAME
std::basic_regex< _Ch_type, _Rx_traits >
SYNOPSIS
Public Types
typedef regex_constants::syntax_option_type flag_type
typedef traits_type::locale_type locale_type
typedef traits_type::string_type string_type
typedef _Rx_traits traits_type
typedef _Ch_type value_type
Public Member Functions
basic_regex ()
template<typename _FwdIter > basic_regex (_FwdIter __first, _FwdIter __last, flag_type
__f=ECMAScript)
Constructs a basic regular expression from the range [first, last) interpreted
according to the flags in f.
basic_regex (basic_regex &&__rhs) noexcept=default
Move-constructs a basic regular expression.
basic_regex (const _Ch_type *__p, flag_type __f=ECMAScript)
Constructs a basic regular expression from the sequence [__p, __p +
char_traits<_Ch_type>::length(__p)) interpreted according to the flags in __f.
basic_regex (const _Ch_type *__p, std::size_t __len, flag_type __f=ECMAScript)
Constructs a basic regular expression from the sequence [p, p + len) interpreted
according to the flags in f.
basic_regex (const basic_regex &__rhs)=default
Copy-constructs a basic regular expression.
template<typename _Ch_traits , typename _Ch_alloc > basic_regex (const std::basic_string<
_Ch_type, _Ch_traits, _Ch_alloc > &__s, flag_type __f=ECMAScript)
Constructs a basic regular expression from the string s interpreted according to the
flags in f.
basic_regex (initializer_list< _Ch_type > __l, flag_type __f=ECMAScript)
Constructs a basic regular expression from an initializer list.
~basic_regex ()
Destroys a basic regular expression.
template<typename _InputIterator > basic_regex & assign (_InputIterator __first,
_InputIterator __last, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object.
basic_regex & assign (basic_regex &&__rhs) noexcept
The move-assignment operator.
basic_regex & assign (const _Ch_type *__p, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object from a C-style null-terminated
string containing a regular expression pattern.
basic_regex & assign (const _Ch_type *__p, size_t __len, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object from a C-style string containing a
regular expression pattern.
basic_regex & assign (const basic_regex &__rhs)
the real assignment operator.
template<typename _Ch_traits , typename _Alloc > basic_regex & assign (const basic_string<
_Ch_type, _Ch_traits, _Alloc > &__s, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object from a string containing a regular
expression pattern.
basic_regex & assign (initializer_list< _Ch_type > __l, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object.
flag_type flags () const
Gets the flags used to construct the regular expression or in the last call to
assign().
locale_type getloc () const
Gets the locale currently imbued in the regular expression object.
locale_type imbue (locale_type __loc)
Imbues the regular expression object with the given locale.
unsigned int mark_count () const
Gets the number of marked subexpressions within the regular expression.
basic_regex & operator= (basic_regex &&__rhs) noexcept
Move-assigns one regular expression to another.
basic_regex & operator= (const _Ch_type *__p)
Replaces a regular expression with a new one constructed from a C-style null-
terminated string.
basic_regex & operator= (const basic_regex &__rhs)
Assigns one regular expression to another.
template<typename _Ch_traits , typename _Alloc > basic_regex & operator= (const
basic_string< _Ch_type, _Ch_traits, _Alloc > &__s)
Replaces a regular expression with a new one constructed from a string.
basic_regex & operator= (initializer_list< _Ch_type > __l)
Replaces a regular expression with a new one constructed from an initializer list.
void swap (basic_regex &__rhs)
Swaps the contents of two regular expression objects.
Static Public Attributes
Constants
std [28.8.1](1)
static constexpr flag_type icase
static constexpr flag_type nosubs
static constexpr flag_type optimize
static constexpr flag_type collate
static constexpr flag_type ECMAScript
static constexpr flag_type basic
static constexpr flag_type extended
static constexpr flag_type awk
static constexpr flag_type grep
static constexpr flag_type egrep
Friends
template<typename _Bp , typename _Ap , typename _Cp , typename _Rp ,
__detail::_RegexExecutorPolicy , bool > bool __detail::__regex_algo_impl (_Bp, _Bp,
match_results< _Bp, _Ap > &, const basic_regex< _Cp, _Rp > &,
regex_constants::match_flag_type)
template<typename , typename , typename , bool > class __detail::_Executor
Related Functions
(Note that these are not member functions.)
template<typename _Ch_type , typename _Rx_traits > void swap (basic_regex< _Ch_type,
_Rx_traits > &__lhs, basic_regex< _Ch_type, _Rx_traits > &__rhs)
Swaps the contents of two regular expression objects.
Detailed Description
template<typename _Ch_type, typename _Rx_traits = regex_traits<_Ch_type>>
class std::basic_regex< _Ch_type, _Rx_traits >" Objects of specializations of this class
represent regular expressions constructed from sequences of character type _Ch_type.
Storage for the regular expression is allocated and deallocated as necessary by the member
functions of this class.
Definition at line 388 of file regex.h.
Constructor & Destructor Documentation
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> std::basic_regex<
_Ch_type, _Rx_traits >::basic_regex () [inline]
Constructs a basic regular expression that does not match any character sequence.
Definition at line 423 of file regex.h.
Referenced by std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> std::basic_regex<
_Ch_type, _Rx_traits >::basic_regex (const _Ch_type * __p, flag_type __f = ECMAScript)
[inline], [explicit]
Constructs a basic regular expression from the sequence [__p, __p +
char_traits<_Ch_type>::length(__p)) interpreted according to the flags in __f.
Parameters
__p A pointer to the start of a C-style null-terminated string containing a regular
expression.
__f Flags indicating the syntax rules and options.
Exceptions
regex_error if __p is not a valid regular expression.
Definition at line 439 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> std::basic_regex<
_Ch_type, _Rx_traits >::basic_regex (const _Ch_type * __p, std::size_t __len, flag_type
__f = ECMAScript) [inline]
Constructs a basic regular expression from the sequence [p, p + len) interpreted according
to the flags in f.
Parameters
__p A pointer to the start of a string containing a regular expression.
__len The length of the string containing the regular expression.
__f Flags indicating the syntax rules and options.
Exceptions
regex_error if __p is not a valid regular expression.
Definition at line 455 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> std::basic_regex<
_Ch_type, _Rx_traits >::basic_regex (const basic_regex< _Ch_type, _Rx_traits > & __rhs)
[default]
Copy-constructs a basic regular expression.
Parameters
__rhs A regex object.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> std::basic_regex<
_Ch_type, _Rx_traits >::basic_regex (basic_regex< _Ch_type, _Rx_traits > && __rhs)
[default], [noexcept]
Move-constructs a basic regular expression.
Parameters
__rhs A regex object.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> template<typename
_Ch_traits , typename _Ch_alloc > std::basic_regex< _Ch_type, _Rx_traits >::basic_regex
(const std::basic_string< _Ch_type, _Ch_traits, _Ch_alloc > & __s, flag_type __f =
ECMAScript) [inline], [explicit]
Constructs a basic regular expression from the string s interpreted according to the flags
in f.
Parameters
__s A string containing a regular expression.
__f Flags indicating the syntax rules and options.
Exceptions
regex_error if __s is not a valid regular expression.
Definition at line 485 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> template<typename
_FwdIter > std::basic_regex< _Ch_type, _Rx_traits >::basic_regex (_FwdIter __first,
_FwdIter __last, flag_type __f = ECMAScript) [inline]
Constructs a basic regular expression from the range [first, last) interpreted according
to the flags in f.
Parameters
__first The start of a range containing a valid regular expression.
__last The end of a range containing a valid regular expression.
__f The format flags of the regular expression.
Exceptions
regex_error if [__first, __last) is not a valid regular expression.
Definition at line 505 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> std::basic_regex<
_Ch_type, _Rx_traits >::basic_regex (initializer_list< _Ch_type > __l, flag_type __f =
ECMAScript) [inline]
Constructs a basic regular expression from an initializer list.
Parameters
__l The initializer list.
__f The format flags of the regular expression.
Exceptions
regex_error if __l is not a valid regular expression.
Definition at line 518 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> std::basic_regex<
_Ch_type, _Rx_traits >::~basic_regex () [inline]
Destroys a basic regular expression.
Definition at line 525 of file regex.h.
Member Function Documentation
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> template<typename
_InputIterator > basic_regex& std::basic_regex< _Ch_type, _Rx_traits >::assign
(_InputIterator __first, _InputIterator __last, flag_type __flags = ECMAScript) [inline]
Assigns a new regular expression to a regex object.
Parameters
__first The start of a range containing a valid regular expression.
__last The end of a range containing a valid regular expression.
__flags Syntax option flags.
Exceptions
regex_error if p does not contain a valid regular expression pattern interpreted
according to __flags. If regex_error is thrown, the object remains unchanged.
Definition at line 674 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::assign (basic_regex< _Ch_type, _Rx_traits > &&
__rhs) [inline], [noexcept]
The move-assignment operator.
Parameters
__rhs Another regular expression object.
Definition at line 596 of file regex.h.
References std::move(), and std::basic_regex< _Ch_type, _Rx_traits >::swap().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::assign (const _Ch_type * __p, flag_type __flags
= ECMAScript) [inline]
Assigns a new regular expression to a regex object from a C-style null-terminated string
containing a regular expression pattern.
Parameters
__p A pointer to a C-style null-terminated string containing a regular expression
pattern.
__flags Syntax option flags.
Exceptions
regex_error if __p does not contain a valid regular expression pattern interpreted
according to __flags. If regex_error is thrown, *this remains unchanged.
Definition at line 617 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::assign (const _Ch_type * __p, size_t __len,
flag_type __flags = ECMAScript) [inline]
Assigns a new regular expression to a regex object from a C-style string containing a
regular expression pattern.
Parameters
__p A pointer to a C-style string containing a regular expression pattern.
__len The length of the regular expression pattern string.
__flags Syntax option flags.
Exceptions
regex_error if p does not contain a valid regular expression pattern interpreted
according to __flags. If regex_error is thrown, *this remains unchanged.
Definition at line 636 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::assign (const basic_regex< _Ch_type, _Rx_traits
> & __rhs) [inline]
the real assignment operator.
Parameters
__rhs Another regular expression object.
Definition at line 583 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::swap().
Referenced by std::basic_regex< _Ch_type, _Rx_traits >::assign(), and std::basic_regex<
_Ch_type, _Rx_traits >::operator=().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> template<typename
_Ch_traits , typename _Alloc > basic_regex& std::basic_regex< _Ch_type, _Rx_traits
>::assign (const basic_string< _Ch_type, _Ch_traits, _Alloc > & __s, flag_type __flags =
ECMAScript) [inline]
Assigns a new regular expression to a regex object from a string containing a regular
expression pattern.
Parameters
__s A string containing a regular expression pattern.
__flags Syntax option flags.
Exceptions
regex_error if __s does not contain a valid regular expression pattern interpreted
according to __flags. If regex_error is thrown, *this remains unchanged.
Definition at line 652 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::basic_regex(), std::basic_regex<
_Ch_type, _Rx_traits >::assign(), std::basic_string< _CharT, _Traits, _Alloc >::data(),
and std::basic_string< _CharT, _Traits, _Alloc >::size().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::assign (initializer_list< _Ch_type > __l,
flag_type __flags = ECMAScript) [inline]
Assigns a new regular expression to a regex object.
Parameters
__l An initializer list representing a regular expression.
__flags Syntax option flags.
Exceptions
regex_error if __l does not contain a valid regular expression pattern interpreted
according to __flags. If regex_error is thrown, the object remains unchanged.
Definition at line 690 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> flag_type
std::basic_regex< _Ch_type, _Rx_traits >::flags () const [inline]
Gets the flags used to construct the regular expression or in the last call to assign().
Definition at line 711 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> locale_type
std::basic_regex< _Ch_type, _Rx_traits >::getloc () const [inline]
Gets the locale currently imbued in the regular expression object.
Definition at line 733 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> locale_type
std::basic_regex< _Ch_type, _Rx_traits >::imbue (locale_type __loc) [inline]
Imbues the regular expression object with the given locale.
Parameters
__loc A locale.
Definition at line 721 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> unsigned int
std::basic_regex< _Ch_type, _Rx_traits >::mark_count () const [inline]
Gets the number of marked subexpressions within the regular expression.
Definition at line 699 of file regex.h.
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::operator= (basic_regex< _Ch_type, _Rx_traits >
&& __rhs) [inline], [noexcept]
Move-assigns one regular expression to another.
Definition at line 539 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign(), and std::move().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::operator= (const _Ch_type * __p) [inline]
Replaces a regular expression with a new one constructed from a C-style null-terminated
string.
Parameters
__p A pointer to the start of a null-terminated C-style string containing a regular
expression.
Definition at line 550 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::operator= (const basic_regex< _Ch_type,
_Rx_traits > & __rhs) [inline]
Assigns one regular expression to another.
Definition at line 532 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> template<typename
_Ch_traits , typename _Alloc > basic_regex& std::basic_regex< _Ch_type, _Rx_traits
>::operator= (const basic_string< _Ch_type, _Ch_traits, _Alloc > & __s) [inline]
Replaces a regular expression with a new one constructed from a string.
Parameters
__s A pointer to a string containing a regular expression.
Definition at line 573 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> basic_regex&
std::basic_regex< _Ch_type, _Rx_traits >::operator= (initializer_list< _Ch_type > __l)
[inline]
Replaces a regular expression with a new one constructed from an initializer list.
Parameters
__l The initializer list.
Exceptions
regex_error if __l is not a valid regular expression.
Definition at line 562 of file regex.h.
References std::basic_regex< _Ch_type, _Rx_traits >::assign().
template<typename _Ch_type , typename _Rx_traits = regex_traits<_Ch_type>> void
std::basic_regex< _Ch_type, _Rx_traits >::swap (basic_regex< _Ch_type, _Rx_traits > &
__rhs) [inline]
Swaps the contents of two regular expression objects.
Parameters
__rhs Another regular expression object.
Definition at line 743 of file regex.h.
Referenced by std::basic_regex< _Ch_type, _Rx_traits >::assign(), and std::basic_regex<
_Ch_type, _Rx_traits >::swap().
Author
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