std::basic_regex::basic_regex


basic_regex();	(1)	(C++11 feature)

explicit basic_regex( const CharT* p, flag_type f = std::regex_constants::ECMAScript );	(2)	(C++11 feature)

basic_regex( const CharT* p, size_t len, flag_type f );	(3)	(C++11 feature)

basic_regex( const basic_regex& rhs );	(4)	(C++11 feature)

basic_regex( const basic_regex&& rhs );	(5)	(C++11 feature)

template< class ST, class SA > explicit basic_regex( const std::basic_string<CharT,ST,SA>& s, flag_type f = std::regex_constants::ECMAScript );	(6)	(C++11 feature)

template< class ForwardIterator > basic_regex( ForwardIterator first, ForwardIterator last, flag_type f = std::regex_constants::ECMAScript );	(7)	(C++11 feature)

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

Constructs a new regex from a sequence of characters interpreted according to the flags.

1) Default constructor. Constructs an empty regular expression which will match nothing.

2) Constructs a regex from a null-terminated (C-string style) sequence of characters.

3) Constructs a regex from a counted sequence of characters.

4) Copy constructor. Constructs a regex by copying rhs

5) Move constructor. Constructs a regex by with the contents of rhs using move semantics.

6) Constructs a regex from a basic_string.

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.

`p`	-	pointer to a character sequence use to initialize the regex
`len`	-	length of a character sequence used to initialize the regex
`first, last`	-	range of a character sequence used to initialize the regex
`s`	-	a basic_string used as a source used to initialize the regex
`rhs`	-	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