On Friday, 26 April 2019 at 10:22:49 UTC, Bastiaan Veelo wrote:
On Friday, 26 April 2019 at 08:35:57 UTC, Bastiaan Veelo wrote:
On Thursday, 25 April 2019 at 08:44:14 UTC, Dennis wrote:
On Monday, 22 April 2019 at 16:24:53 UTC, Taylor Hillegeist
wrote:
Or would this not be easy at all with D?
I don't think so. While there are lots of traits for
introspection of declarations, there is no way to introspect
lines of code. The whole function
would need to be wrapped into a mixin, and the D code would
need to be parsed
at compile time for this to work.
Yes, but I think that might be doable. You wouldn't need a
full blown D parser, just one that can identify statements
(`;` being an important clue). Not sure whether __LINE__ will
be meaningful inside a mixin, though, but that might also be
fixable. It would be an interesting challenge.
Bastiaan.
Proofing the concept:
---
mixin(snoop(q{
int fun(int a, int b)
{
int c = 3;
foreach (i; 1 .. 5)
{
a += i;
}
int d = a + b + c;
return d;
}
}));
---
Output:
2019-Apr-26 10:33:46.0935135 executed line 7: int c = 3;
2019-Apr-26 10:33:46.0936716 executed line 10: a +=
i;
2019-Apr-26 10:33:46.0937348 executed line 10: a +=
i;
2019-Apr-26 10:33:46.0937963 executed line 10: a +=
i;
2019-Apr-26 10:33:46.0938583 executed line 10: a +=
i;
2019-Apr-26 10:33:46.0939622 executed line 12: int d =
a + b + c;
https://run.dlang.io/is/Go97hQ
Bastiaan.
Hey, that's a pretty cool demo. I saw the idea and wondered
rather it could be possible with D. I has some very cool
introspection properties. The Link seems to be broken right now.
But I think this might be worth some development. Tools like this
can really help new users, especially when they are doing things
the o'l fashion way, printf for debugging. I doubt it would be
too much help for things like ranges, but one must pick their
battles.
Thanks.
