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std::basic_regex::basic_regex

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< cpp‎ | regex‎ | basic regex
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basic_regex();
(1) (since C++11)
explicit basic_regex( const CharT* s,
                      flag_type f = std::regex_constants::ECMAScript );
(2) (since C++11)
basic_regex( const CharT* s, std::size_t count,
             flag_type f = std::regex_constants::ECMAScript );
(3) (since C++11)
basic_regex( const basic_regex& other );
(4) (since C++11)
basic_regex( basic_regex&& other );
(5) (since C++11)
template< class ST, class SA >

explicit basic_regex( const std::basic_string<CharT,ST,SA>& str,

                      flag_type f = std::regex_constants::ECMAScript );
(6) (since C++11)
template< class ForwardIt >

basic_regex( ForwardIt first, ForwardIt last,

             flag_type f = std::regex_constants::ECMAScript );
(7) (since C++11)
basic_regex( std::initializer_list<CharT> init,
             flag_type f = std::regex_constants::ECMAScript );
(8) (since C++11)

Constructs a new regular expression from a sequence of characters interpreted according to the flags f.

1) Default constructor. Constructs an empty regular expression which will match nothing.
2) Constructs a regex from a null-terminated string s.
3) Constructs a regex from a sequence of count characters, pointed to by s.
4) Copy constructor. Constructs a regex by copying other
5) Move constructor. Constructs a regex by with the contents of other using move semantics.
6) Constructs a regex from a string str.
7) Range constructor. Constructs the string with the contents of the range [first, last).
8) Initializer list constructor. Constructs the string with the contents of the initializer list init.

[edit] Parameters

s - pointer to a null-terminated string
count - length of a character sequence used to initialize the regex
first, last - range of a character sequence used to initialize the regex
str - a basic_string used as a source used to initialize the regex
other - another regex to use as source to initialize the regex
init - initializer list used to initialize the regex
f - flags used to guide the interpretation of the character sequence as a regular expression
Type requirements
-
ForwardIt must meet the requirements of ForwardIterator.

[edit] Exceptions

1) (none)
2-3) std::regex_error if the supplied regular expression is not valid.
4) (none)
5)
noexcept specification:  
noexcept
  
5-8) std::regex_error if the supplied regular expression is not valid.