Nice Inline Syntax for DSLs

[Tyler Knott]

Knud Soerensen wrote:
> On Fri, 16 Feb 2007 19:08:47 -0600, Tyler Knott wrote:
> 
> No, I meant something like.
> 
> compilerFunc draw[, ...] 
> { 
> ...   // parser code for the draw dsl.   
> };
> 
> and then it is used like
> 
> draw
> {
> moveto x,y;
> circle(2.0);
> ...
> }
> 
> the should be no need to repeat "compilerFunc[, ...]"
> every time the dsl is needed.

I don't think you're quite understanding what I meant.  For your draw 
example, it'd look like this

char[] draw(char[] rawcode)
{
	//process rawcode and return D code
}

dsl(draw)
{
	move x,y;
	circle(2.0);
	...
}

which translates to:

mixin(draw(`
	move x,y;
	circle(2.0);
	...
`));

The only real differences between our syntaxes is that I require the 
"dsl" keyword every time this syntax is used, and the compiler functions 
are just standard functions (with the two restrictions mentioned in my 
post).