On 16.12.2010 23:33, Alex_Dovhal wrote:
"Andrej Mitrovic"<andrej.mitrov...@gmail.com> wrote:
The cool thing about D is that with a little bit of string magic you
can make your own DSL's. Here's a rather hardcoded and superficial
example, but for this simple case it works:
http://pastebin.com/Xkghv1ky
Of course you'd need to build your own little DSL string parsing
functions and use regex instead of hardcoding it like that. But all
kinds of syntaxes are possible.
You are right. I tried making one. It parses things like sum !(q{ i=0:10;
i * sum!(q{ j=0:10, j!=i; i*j }) })
http://pastebin.com/mQaKXaYY -
But it doesn't work because not being CTFE friendly, and also syntax parser
is ugly because I am not strong at syntax parsing.
Note that creating good syntax parser in CTFE is rather hard, especially for
complex syntaxes like of D expressions.
Oh, if CTFE could:
1) run external process
2) do file i/o
3) use dynamic libraries
This would be much much simpler, but I guess it will not.
This features also has safety issues, but D is system language, not browser
one.
I don't think that the syntax improvement of chaining is worth such an
effort. It adds tons of complexity for only a very limited gain. I'm not
sure if I could write such self-parsed code without thinking about that
pipeline.
