🚀 go-pugleaf

J. Kanze (kanze@gabi-soft.fr) wrote:
> That it would be nice, but that there are two very big problems:

> 1. It would basically require a complete C++ interpreter in the
> compiler, and

But in almost all cases such interpreter is already present in C++ 
compilers! Because of cause all such const look expressions are correct 
C++ expressions so every C++ compiler has to generate a code that will 
evaluate them at run time and if forget about the crosscompilation case 
I think instead of putting the code to object file compiler can just execute 
it...

> 2. It would make the notion of constant expression somewhat
> implementation dependant.  Suppose my compiler implements the function
> sin as an inline invocation of a compiler built-in.  Can I then use sin
> in a constant expression?

Consider, for example, next:
const double x = 1.0 / (very small number); 
And of cause, the result will depend on exact representation of double... 

--
Regards, Igor Boukanov 
// igor.boukanov@fi.uib.no  http://www.fi.uib.no/~boukanov/
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