std.locale

[Walter Bright]

Andrei Alexandrescu wrote:
> There will be a global reference to a Locale class, e.g. defaultLocale. 
> By default the reference will be null, implying the C locale should be 
> in effect. Applications can assign to it as they find fit, and also pass 
> around multiple locale variables.

I disagree with being able to assign to the global defaultLocale. This 
is going to cause endless problems. Just one is that any function that 
uses locale can no longer be pure. defaultLocale should be immutable.

Any function that is locale aware should be parameterized with a locale 
parameter. (Not only is that better design, it self-documents the 
dependency.)