std::match_results::basic_string


explicit match_results( const Allocator& a = Allocator() );	(1)	(C++11 feature)

match_results( const match_results& rhs );	(2)	(C++11 feature)

match_results( match_results&& rhs );	(3)	(C++11 feature)

1) Default-constructs a match_result. Has no fully-establish result state (ready() != true).

2) Copy-constructs a match_result.

3) Move-constructs a match_result.

Accessible constructors may only be used to default-construct, copy-construct, or move-construct objects of the match-results class.

`a`	-	allocator to use for all memory allocations of this container
`rhs`	-	another match_result to use as source to initialize the match_result with

1-2) (none)

3)

noexcept specification:

(C++11 feature)