DIP 50 - AST macros

[dennis luehring]

Am 14.11.2013 09:53, schrieb Walter Bright:
> On 11/13/2013 11:37 PM, Jacob Carlborg wrote:
>> On 2013-11-14 01:16, Walter Bright wrote:
>>
>>> Yes. But that's a good thing. I'd be pretty skeptical of the value of an
>>> AST macro that took 3+4 and changed it so it did something other than
>>> compute 7.
>>
>> You can still do stupid things like that with operator overloading. Not on
>> built-in types, but on user defined types. Every language allows you to do
>> stupid things, one way or another.
>
> Sure, but the issue is that expression templates are not for "int+int", but for
> "T+int". My question is what value would there be in a rewrite of "int+int" to
> mean something different.

"int + int" could be part of an PC<->GPU kombination that generates 
CUDA- and D-interchange code at compiletime