[patch] libstdc++/61374 fix string_view conversion and update to latest draft

[Jonathan Wakely]

On 01/06/14 18:24 +0100, Jonathan Wakely wrote:
>Tested x86_64-linux, committed to trunk.
>
>This should probably go on the 4.9 branch too, although we could leave
>the old default cosntructor semantics and just fix the conversion
>operator.

Now committed to the 4.9 branch too.

>    	PR libstdc++/61374
>    	* include/experimental/string_view (operator basic_string): Correct
>    	order of arguments.
>    	(to_string): Replace with member function.
>    	Add inline specifiers. Remove unused header. Remove _S_empty_rep and
>    	allow _M_str to be null.
>    	* testsuite/experimental/string_view/cons/char/1.cc: Adjust to new
>    	default constructor semantics.
>    	* testsuite/experimental/string_view/cons/wchar_t/1.cc: Likewise.
>    	* testsuite/experimental/string_view/operations/copy/char/1.cc: Fix
>    	copyright dates. Remove unused header.
>    	* testsuite/experimental/string_view/operations/copy/wchar_t/1.cc:
>    	Likewise.
>    	* testsuite/experimental/string_view/operations/data/char/1.cc:
>    	Fix copyright dates. Adjust to new default constructor semantics.
>    	* testsuite/experimental/string_view/operations/data/wchar_t/1.cc:
>    	Likewise.
>    	* testsuite/experimental/string_view/operations/to_string/1.cc: New.