Implement N3642 - User-defined Literals for Standard Library Types

[Daniel Krügler]

2013/5/31 Ed Smith-Rowland <3dw4rd@verizon.net>:
> Greetings,
>
> This patch implements N3642 - User-defined literals for
> std::chrono::duration and std::basic_string
> and N3660 - User-defined literals for std::complex.

 N3660 was rejected during the Bristol meeting, the main reason being
the ugliness of the complex-float literal and giving it some time to
find a possible sore language solution. Is there still the idea to add
this now?

- Daniel