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digitalmars.D - Implementing Scheme as DSL for D

reply vsb <v04bvs gmail.com> writes:
I want to implement a library for D.
It's better to show as I imagine it now:

mixin(scheme("
(define my_plus (lambda (a b) (+ a b)))
"));

int a = 1;
int b = 2;
writefln("%d + %d = %d", a, b, my_plus(a, b));

function scheme() is a function which translates code in Scheme to code in D.
I'm planning that resulting D code will just reflect all the structure, except
few cases such as defining new functions. 
In the case above it would be translated in next code:

"
SExpr my_plus(SExpr a, SExpr b) {
    return new List(lambda, new List(a, b), new List(PLUS, a, b));
}
"

And after applying mixin() on this it introduces new function, which could be
used naturally as plain D function. Of course it requires a supporting library.

Is there any things which could make my task impossible at all? As I see,
functions which could be run in compile-time are restricted, but for simple
parser (especially for such syntactically simple language as Scheme) they are
powerful enough. Any ideas are welcome.
Mar 12 2007
parent Charlie <charlie.fats gmail.com> writes:
This looks like allot of fun, I look forward to following your progress 
:).  I don't see any show stoppers, but I only have a little experience 
with this.

Charlie

vsb wrote:
 I want to implement a library for D.
 It's better to show as I imagine it now:
 
 mixin(scheme("
 (define my_plus (lambda (a b) (+ a b)))
 "));
 
 int a = 1;
 int b = 2;
 writefln("%d + %d = %d", a, b, my_plus(a, b));
 
 function scheme() is a function which translates code in Scheme to code in D.
I'm planning that resulting D code will just reflect all the structure, except
few cases such as defining new functions. 
 In the case above it would be translated in next code:
 
 "
 SExpr my_plus(SExpr a, SExpr b) {
     return new List(lambda, new List(a, b), new List(PLUS, a, b));
 }
 "
 
 And after applying mixin() on this it introduces new function, which could be
used naturally as plain D function. Of course it requires a supporting library.
 
 Is there any things which could make my task impossible at all? As I see,
functions which could be run in compile-time are restricted, but for simple
parser (especially for such syntactically simple language as Scheme) they are
powerful enough. Any ideas are welcome.

Mar 12 2007