std::match_results< _Bi_iter, _Alloc > Class Template Reference
Regular Expressions
Inheritance diagram for std::match_results< _Bi_iter, _Alloc >:
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## Public Member Functions

template<typename _Out_iter >
_Out_iter | format (_Out_iter __out, const match_results< _Bi_iter, _Alloc >::char_type *__fmt_first, const match_results< _Bi_iter, _Alloc >::char_type *__fmt_last, match_flag_type __flags) const
bool | ready () const

## Private Types

typedef _Alloc_traits::const_pointer | const_pointer
typedef std::reverse_iterator< const_iterator > | const_reverse_iterator
typedef _Base::pointer | pointer
typedef std::reverse_iterator< iterator > | reverse_iterator

## Private Member Functions

pointer | _M_allocate (size_t __n)
pointer | _M_allocate_and_copy (size_type __n, _ForwardIterator __first, _ForwardIterator __last)
void | _M_assign_aux (_InputIterator __first, _InputIterator __last, std::input_iterator_tag)
void | _M_assign_aux (_ForwardIterator __first, _ForwardIterator __last, std::forward_iterator_tag)
void | _M_assign_dispatch (_Integer __n, _Integer __val, __true_type)
void | _M_assign_dispatch (_InputIterator __first, _InputIterator __last, __false_type)
size_type | _M_check_len (size_type __n, const char *__s) const
void | _M_deallocate (pointer __p, size_t __n)
void | _M_default_append (size_type __n)
void | _M_default_initialize (size_type __n)
auto | _M_emplace_aux (const_iterator __position, _Args &&... __args) -> iterator
iterator | _M_emplace_aux (const_iterator __position, _Args &&... __args)
iterator | _M_emplace_aux (const_iterator __position, value_type &&__v)
iterator | _M_erase (iterator __position)
iterator | _M_erase (iterator __first, iterator __last)
void | _M_erase_at_end (pointer __pos) noexcept
void | _M_fill_assign (size_type __n, const value_type &__val)
void | _M_fill_initialize (size_type __n, const value_type &__value)
void | _M_fill_insert (iterator __pos, size_type __n, const value_type &__x)
_Tp_alloc_type & | _M_get_Tp_allocator () noexcept
const _Tp_alloc_type & | _M_get_Tp_allocator () const noexcept
void | _M_initialize_dispatch (_Integer __n, _Integer __value, __true_type)
void | _M_initialize_dispatch (_InputIterator __first, _InputIterator __last, __false_type)
void | _M_insert_aux (iterator __position, _Arg &&__arg)
void | _M_insert_dispatch (iterator __pos, _Integer __n, _Integer __val, __true_type)
void | _M_insert_dispatch (iterator __pos, _InputIterator __first, _InputIterator __last, __false_type)
iterator | _M_insert_rval (const_iterator __position, value_type &&__v)
void | _M_range_check (size_type __n) const
void | _M_range_initialize (_InputIterator __first, _InputIterator __last, std::input_iterator_tag)
void | _M_range_initialize (_ForwardIterator __first, _ForwardIterator __last, std::forward_iterator_tag)
void | _M_range_insert (iterator __pos, _InputIterator __first, _InputIterator __last, std::input_iterator_tag)
void | _M_range_insert (iterator __pos, _ForwardIterator __first, _ForwardIterator __last, std::forward_iterator_tag)
void | _M_realloc_insert (iterator __position, _Args &&... __args)
bool | _M_shrink_to_fit ()
void | assign (size_type __n, const value_type &__val)
void | assign (_InputIterator __first, _InputIterator __last)
void | assign (initializer_list< value_type > __l)
reference | at (size_type __n)
const_reference | at (size_type __n) const
reference | back () noexcept
const_reference | back () const noexcept
iterator | begin () noexcept
size_type | capacity () const noexcept
void | clear () noexcept
const_reverse_iterator | crbegin () const noexcept
const_reverse_iterator | crend () const noexcept
sub_match< _Bi_iter > * | data () noexcept
const sub_match< _Bi_iter > * | data () const noexcept
iterator | emplace (const_iterator __position, _Args &&... __args)
void | emplace_back (_Args &&... __args)
iterator | end () noexcept
iterator | erase (const_iterator __position)
iterator | erase (const_iterator __first, const_iterator __last)
reference | front () noexcept
const_reference | front () const noexcept
iterator | insert (const_iterator __position, const value_type &__x)
iterator | insert (const_iterator __position, value_type &&__x)
iterator | insert (const_iterator __position, initializer_list< value_type > __l)
iterator | insert (const_iterator __position, size_type __n, const value_type &__x)
iterator | insert (const_iterator __position, _InputIterator __first, _InputIterator __last)
reference | operator[] (size_type __n) noexcept
const_reference | operator[] (size_type __n) const noexcept
void | pop_back () noexcept
void | push_back (const value_type &__x)
void | push_back (value_type &&__x)
reverse_iterator | rbegin () noexcept
const_reverse_iterator | rbegin () const noexcept
reverse_iterator | rend () noexcept
const_reverse_iterator | rend () const noexcept
void | reserve (size_type __n)
void | resize (size_type __new_size)
void | resize (size_type __new_size, const value_type &__x)
void | shrink_to_fit ()
void | swap (vector &__x) noexcept

## Private Attributes

_Vector_impl | _M_impl

## 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
template<typename , typename , typename >
class | regex_iterator

## 10.? Public Types

typedef sub_match< _Bi_iter > | value_type
typedef const value_type & | const_reference
typedef value_type & | reference
typedef _Base_type::const_iterator | const_iterator
typedef const_iterator | iterator
typedef __iter_traits::difference_type | difference_type
typedef allocator_traits< _Alloc >::size_type | size_type
typedef _Alloc | allocator_type
typedef __iter_traits::value_type | char_type
typedef std::basic_string< char_type > | string_type

## 28.10.1 Construction, Copying, and Destruction

| match_results (const _Alloc &__a=_Alloc())
| match_results (const match_results &__rhs)=default
| match_results (match_results &&__rhs) noexcept=default
match_results & | operator= (const match_results &__rhs)=default
match_results & | operator= (match_results &&__rhs)=default
| ~match_results ()

## 28.10.2 Size

size_type | size () const
size_type | max_size () const
bool | empty () const

## 10.3 Element Access

difference_type | length (size_type __sub=0) const
difference_type | position (size_type __sub=0) const
string_type | str (size_type __sub=0) const
const_reference | operator[] (size_type __sub) const
const_reference | prefix () const
const_reference | suffix () const
const_iterator | begin () const
const_iterator | cbegin () const
const_iterator | end () const
const_iterator | cend () const

## 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 `flags` parameter as documented above.
template<typename _Out_iter >
_Out_iter | format (_Out_iter __out, const char_type *__fmt_first, const char_type *__fmt_last, match_flag_type __flags=regex_constants::format_default) const
template<typename _Out_iter , typename _St , typename _Sa >
_Out_iter | format (_Out_iter __out, const basic_string< char_type, _St, _Sa > &__fmt, match_flag_type __flags=regex_constants::format_default) const
template<typename _St , typename _Sa >
basic_string< char_type, _St, _Sa > | format (const basic_string< char_type, _St, _Sa > &__fmt, match_flag_type __flags=regex_constants::format_default) const
string_type | format (const char_type *__fmt, match_flag_type __flags=regex_constants::format_default) const

## 10.5 Allocator

allocator_type | get_allocator () const

## 10.6 Swap

void | swap (match_results &__that)

## Detailed Description

### template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>
class std::match_results< _Bi_iter, _Alloc >

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.

Definition at line 39 of file regex.h.

## Constructor & Destructor Documentation

## match_results() [1/3]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

std::match_results< _Bi_iter, _Alloc >::match_results | ( | const _Alloc & | __a = `_Alloc()` | ) |

inline explicit

Constructs a default match_results container.

Postcondition
  size() returns 0 and str() returns an empty string.

Definition at line 1563 of file regex.h.

## match_results() [2/3]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

std::match_results< _Bi_iter, _Alloc >::match_results | ( | const match_results< _Bi_iter, _Alloc > & | __rhs | ) |

default

Copy constructs a match_results.

## match_results() [3/3]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

std::match_results< _Bi_iter, _Alloc >::match_results | ( | match_results< _Bi_iter, _Alloc > && | __rhs | ) |

default noexcept

Move constructs a match_results.

## ~match_results()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

std::match_results< _Bi_iter, _Alloc >::~match_results | ( |  | ) |

inline

Destroys a match_results object.

Definition at line 1592 of file regex.h.

## Member Function Documentation

## begin()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

const_iterator std::match_results< _Bi_iter, _Alloc >::begin | ( |  | ) | const

inline

Gets an iterator to the start of the sub_match collection.

Definition at line 1737 of file regex.h.

Referenced by std::operator==().

## cbegin()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

const_iterator std::match_results< _Bi_iter, _Alloc >::cbegin | ( |  | ) | const

inline

Gets an iterator to the start of the sub_match collection.

Definition at line 1744 of file regex.h.

## cend()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

const_iterator std::match_results< _Bi_iter, _Alloc >::cend | ( |  | ) | const

inline

Gets an iterator to one-past-the-end of the collection.

Definition at line 1758 of file regex.h.

## empty()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

bool std::match_results< _Bi_iter, _Alloc >::empty | ( |  | ) | const

inline

Indicates if the match_results contains no results.

Return values

  true | The match_results object is empty.
  false | The match_results object is not empty.

Definition at line 1633 of file regex.h.

Referenced by std::operator==().

## end()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

const_iterator std::match_results< _Bi_iter, _Alloc >::end | ( |  | ) | const

inline

Gets an iterator to one-past-the-end of the collection.

Definition at line 1751 of file regex.h.

Referenced by std::operator==().

## format() [1/4]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>
template<typename _Out_iter >

_Out_iter std::match_results< _Bi_iter, _Alloc >::format | ( | _Out_iter | __out,
|  | const char_type * | __fmt_first,
|  | const char_type * | __fmt_last,
|  | match_flag_type | __flags = `regex_constants::format_default`
| ) |  | const

Precondition
  ready() == true

Referenced by std::regex_traits< _CharType >::value().

## format() [2/4]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>
template<typename _Out_iter , typename _St , typename _Sa >

_Out_iter std::match_results< _Bi_iter, _Alloc >::format | ( | _Out_iter | __out,
|  | const basic_string< char_type, _St, _Sa > & | __fmt,
|  | match_flag_type | __flags = `regex_constants::format_default`
| ) |  | const

inline

Precondition
  ready() == true

Definition at line 1787 of file regex.h.

## format() [3/4]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>
template<typename _St , typename _Sa >

basic_string<char_type, _St, _Sa> std::match_results< _Bi_iter, _Alloc >::format | ( | const basic_string< char_type, _St, _Sa > & | __fmt,
|  | match_flag_type | __flags = `regex_constants::format_default`
| ) |  | const

inline

Precondition
  ready() == true

Definition at line 1799 of file regex.h.

## format() [4/4]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

string_type std::match_results< _Bi_iter, _Alloc >::format | ( | const char_type * | __fmt,
|  | match_flag_type | __flags = `regex_constants::format_default`
| ) |  | const

inline

Precondition
  ready() == true

Definition at line 1811 of file regex.h.

## get_allocator()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

allocator_type std::match_results< _Bi_iter, _Alloc >::get_allocator | ( |  | ) | const

inline

Gets a copy of the allocator.

Definition at line 1833 of file regex.h.

## length()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

difference_type std::match_results< _Bi_iter, _Alloc >::length | ( | size_type | __sub = `0` | ) | const

inline

Gets the length of the indicated submatch.

Parameters

  __sub | indicates the submatch.

Precondition
  ready() == true

This function returns the length of the indicated submatch, or the length of the entire match if `__sub` is zero (the default).

Definition at line 1652 of file regex.h.

## max_size()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

size_type std::match_results< _Bi_iter, _Alloc >::max_size | ( |  | ) | const

inline

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.

Definition at line 1624 of file regex.h.

## operator=() [1/2]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

match_results& std::match_results< _Bi_iter, _Alloc >::operator= | ( | const match_results< _Bi_iter, _Alloc > & | __rhs | ) |

default

Assigns rhs to *this.

## operator=() [2/2]

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

match_results& std::match_results< _Bi_iter, _Alloc >::operator= | ( | match_results< _Bi_iter, _Alloc > && | __rhs | ) |

default

Move-assigns rhs to *this.

## operator[]()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

const_reference std::match_results< _Bi_iter, _Alloc >::operator[] | ( | size_type | __sub | ) | const

inline

Gets a sub_match reference for the match or submatch.

Parameters

  __sub | indicates the submatch.

Precondition
  ready() == true

This function gets a reference to the indicated submatch, or the entire match if `__sub` is zero.

If `__sub` >= size() then this function returns a sub_match with a special value indicating no submatch.

Definition at line 1695 of file regex.h.

## position()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

difference_type std::match_results< _Bi_iter, _Alloc >::position | ( | size_type | __sub = `0` | ) | const

inline

Gets the offset of the beginning of the indicated submatch.

Parameters

  __sub | indicates the submatch.

Precondition
  ready() == true

This function returns the offset from the beginning of the target sequence to the beginning of the submatch, unless the value of `__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.

Definition at line 1667 of file regex.h.

## prefix()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

const_reference std::match_results< _Bi_iter, _Alloc >::prefix | ( |  | ) | const

inline

Gets a sub_match representing the match prefix.

Precondition
  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.

Definition at line 1712 of file regex.h.

Referenced by std::operator==().

## ready()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

bool std::match_results< _Bi_iter, _Alloc >::ready | ( |  | ) | const

inline

Indicates if the match_results is ready.

Return values

  true | The object has a fully-established result state.
  false | The object is not ready.

Definition at line 1603 of file regex.h.

Referenced by std::operator==().

## size()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

size_type std::match_results< _Bi_iter, _Alloc >::size | ( |  | ) | const

inline

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.

Definition at line 1620 of file regex.h.

Referenced by std::operator==().

## str()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

string_type std::match_results< _Bi_iter, _Alloc >::str | ( | size_type | __sub = `0` | ) | const

inline

Gets the match or submatch converted to a string type.

Parameters

  __sub | indicates the submatch.

Precondition
  ready() == true

This function gets the submatch (or match, if `__sub` is zero) extracted from the target range and converted to the associated string type.

Definition at line 1680 of file regex.h.

## suffix()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

const_reference std::match_results< _Bi_iter, _Alloc >::suffix | ( |  | ) | const

inline

Gets a sub_match representing the match suffix.

Precondition
  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.

Definition at line 1727 of file regex.h.

Referenced by std::operator==().

## swap()

template<typename _Bi_iter, typename _Alloc = allocator<sub_match<_Bi_iter> >>

void std::match_results< _Bi_iter, _Alloc >::swap | ( | match_results< _Bi_iter, _Alloc > & | __that | ) |

inline

Swaps the contents of two match_results.

Definition at line 1847 of file regex.h.

Referenced by std::swap().

The documentation for this class was generated from the following files:

- regex.h
- regex.tcc