On Sun, 03 Apr 2011 15:40:18 -0400, Nick Sabalausky <a@a.a> wrote:
"Andrej Mitrovic" <andrej.mitrov...@gmail.com> wrote in message
news:mailman.3093.1301858962.4748.digitalmar...@puremagic.com...
On 4/3/11, Nick Sabalausky <a@a.a> wrote:
I've always thought that we should be able to do something like this:
template foo(int val)
{
enum foo = val.meta.argString;
}
static assert(foo!(2+3) == "2+3");
I wish we had some introspection to get the lines of code inside of a
function. But it's still pretty cool that you can pass expressions to
functions and automatically construct delegates. See here:
import std.stdio;
void main()
{
int x;
foo(false, x = 5);
assert(x != 5);
foo(true, x = 5);
assert(x == 5);
}
void foo(bool doit, int delegate()[] dgs ...)
{
if (doit)
dgs[0]();
}
I wonder how many people know about this feature. I just bumped into
it a few days ago while looking through the docs.
I didn't know that. I think I remember the idea of it being discussed,
but I
didn't know it was in.
It's been there forever (at least since I first learned D). It's even in
D1:
http://www.digitalmars.com/d/1.0/function.html
Look for "Lazy variadic functions"
I think what you were thinking of is the replacement of lazy with simply a
delegate (which this example is not).
-Steve
