program for building the program

[gzp]

Denis Koroskin írta:
> On Tue, 01 Dec 2009 17:02:40 +0300, Nick Sabalausky <a at a.a> wrote:
> 
>> "Gzp" <galap at freemail.hu> wrote in message
>> news:hf2k9a$2l54$1 at digitalmars.com...
>>> The compiler also should provide readably output of the generated code.
>>
>> I'm not sure if this is what you mean, but I definitely want a compiler
>> switch that outputs the resulting D code after all the mixins and such 
>> are
>> applied.
>>

Yes this is what I've meant and also a way to document the generated 
codes in a more readable form.
Ex. for a matrix (planned to) have multiple additions depending on the 
matrix representation and each have a different property (like 
performance) that the user should be aware of. The actual functions the 
user calls are generated by mixins and it's quite difficult to find out 
what is called exactly.
So from a documentation view it'd be great to document the 
(auto)generated code.

>>
> 
> FWIW, Descent already capable of doing this:
> 
> http://www.youtube.com/watch?v=oAhrFQVnsrY

It looks great to develop the library, but as a user of a library most 
certainly I'm not interested how the code is expanded I just want to now 
what function/class to use and what parameters it requires. (Though I 
really liked the idea).

ex:
package template DefineUnary(string tName, string tFunction) {
	const char[] code = "void " ~ tName ~ "(T)( ref T p ) { " ~
		   		   "UnaryOperation!(\""~ tFunction~ "\").inPlace( p ); }" ~
		   		
				   "void " ~ tName ~ "(T1, T2)( const T1 p1, ref T2 p2 ) { " ~
		   		   "UnaryOperation!(\""~ tFunction~ "\").copy( p1,p2 ); }";
}

mixin( DefineUnary!("neg", "-a" ).code );
mixin( DefineUnary!("twice", "2*a" ).code );
mixin( DefineUnary!("triple", "3*a" ).code );

It's quite hard to find out what is the function actually. Not only the 
parameters but the function name is not trivial at all.

Note: There might be better solutions for this.

Gzp