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.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. | ||
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.
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