NAME¶

std::basic_regex::basic_regex - std::basic_regex::basic_regex

Synopsis¶

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

explicit basic_regex( const std::basic_string<CharT,ST,SA>& str, (6) (since C++11)

flag_type f = std::regex_constants::ECMAScript );
template< class ForwardIt >

basic_regex( ForwardIt first, ForwardIt last, (7) (since C++11)

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

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 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.

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 LegacyForwardIterator.

Exceptions¶

1) May throw implementation-defined exceptions.
2-3) std::regex_error if the supplied regular expression is not valid.
5) May throw implementation-defined exceptions.
6-8) std::regex_error if the supplied regular expression is not valid.

Example¶

This section is incomplete
Reason: no example