streaming redux

[spir]

On Wed, 29 Dec 2010 11:02:23 -0500
"Steven Schveighoffer" <schveiguy at yahoo.com> wrote:

> stdout is currently implemented via C's FILE * to allow interleaving of C  
> output and D output.  However, FILE * has some limitations that may hinder  
> performance.  If you don't care about interleaving C and D I/O, you could  
> replace stdout with a D-based output stream to achieve higher  
> performance.  But this is only possible if stdout is *runtime* switchable,  
> which means both the C-based stdout and the D-based stdout have a common  
> base and implement polymorphism.
> 
> I think the right call in I/O is to use interfaces/classes and not  
> compile-time interfaces.

+++ (IIUC) What about logging? Or even output to several 'streams' in //.
One can use an external lib's output functionality and redirect it simply by reassigning stdout. How are such features currently written using D?

Denis
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