table of contents
std::basic_regex::basic_regex(3) | C++ Standard Libary | std::basic_regex::basic_regex(3) |
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
2022.07.31 | http://cppreference.com |