std::regex_match

Template:cpp/regex/sidebar Template:ddcl list begin <tr class="t-dsc-header">

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Defined in header <regex>

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<td></td> <td></td> </tr> <tr class="t-dcl ">

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template< class BidirectionalIterator,

          class Alloc, class CharT, class Traits >
bool regex_match( BidirectionalIterator first, BidirectionalIterator last,
                  std::match_results<BidirectionalIterator,Alloc>& m,
                  const std::basic_regex<CharT,Traits>& e,
                  std::regex_constants::match_flag_type flags =

                      std::regex_constants::match_default );

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<td > (1) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

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template< class BidirectionalIterator,

          class CharT, class Traits >
bool regex_match( BidirectionalIterator first, BidirectionalIterator last,
                  const std::basic_regex<CharT,Traits>& e,
                  std::regex_constants::match_flag_type flags =

                      std::regex_constants::match_default );

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<td > (2) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

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template< class CharT, class Alloc, class Traits >

bool regex_match( const CharT* str,
                  std::match<const CharT*,Alloc>& m,
                  const std::basic_regex<CharT,Traits>& e,
                  std::regex_constants::match_flag_type flags =

                      std::regex_constants::match_default );

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<td > (3) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

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template< class STraits, class SAlloc,

          class Alloc, class CharT, class Traits >
bool regex_match( const std::basic_string<CharT,STraits,SAlloc>& s,
                  std::match_results<
                      typename std::basic_string<CharT,STraits,SAlloc>::const_iterator,
                      Alloc
                  >& m,
                  const std::basic_regex<CharT,Traits>& e,
                  std::regex_constants::match_flag_type flags =

                      std::regex_constants::match_default );

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<td > (4) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

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template< class CharT, class Traits >

bool regex_match( const CharT* str,
                  const std::basic_regex<CharT,Traits>& e,
                  std::regex_constants::match_flag_type flags =

                      std::regex_constants::match_default );

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<td > (5) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

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template< class STraits, class SAlloc,

          class CharT, class Traits >
bool regex_match( const std::basic_string<CharT, STraits, SAlloc>& s,
                  const std::basic_regex<CharT,Traits>& e,
                  std::regex_constants::match_flag_type flags =

                      std::regex_constants::match_default );

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<td > (6) </td> <td > (since C++11) </td> </tr> Template:ddcl list end

1) Determines if there is a match between the regular express e and the target character sequence [first,last). Match results are returned in m.

2) Behaves as (1) above, omitting the match results.

3) Returns std::regex_match(str, str + std::char_traits<charT>::length(str), m, e, flags).

4) Returns std::regex_match(s.begin(), s.end(), m, e, flags).

5) Returns std::regex_match(str, str + std::char_traits<charT>::length(str), e, flags).

6) Returns std::regex_match(s.begin(), s.end(), e, flags).

Parameters

first, last	-	the target character range to apply the regex to, given as iterators
m	-	the match results
str	-	a target string, given as a null-terminated C-style string
s	-	a target string, given as a std::basic_string
e	-	the std::regex
flags	-	flags used to determine how the match will be performed

Return value

Returns true if a match exists, false otherwise.

Example

Run this code

#include <iostream>
#include <string>
#include <regex>
 
int main()
{
    std::string fnames[] = {"foo.txt", "bar.txt", "zoidberg"};
 
    std::regex txt_regex("[a-z]+\\.txt");
    for (const auto &fname : fnames) {
        std::cout << fname << ": " << std::regex_match("foo.txt", txt_regex) << '\n';
    }
}

Output:

foo.txt: 1
bar.txt: 1
zoidberg: 0

See also

Template:cpp/regex/dcl list basic regexTemplate:cpp/regex/dcl list match results