Implement N3762 string_view: a non-owning reference to a string.

[Paolo Carlini]

Hi,

On 11/15/2013 12:18 PM, Jonathan Wakely wrote:
> I think the std::hash declaration and specializations should be inside 
> a _GLIBCXX_BEGIN_NAMESPACE_VERSION / _GLIBCXX_END_NAMESPACE_VERSION 
> pair, because when using versioned namespaces they will be in 
> std::__v7 not std. 
Normally running check-debug too is useful to double check these details.

Paolo.