On Thursday, 17 March 2016 at 13:53:00 UTC, JR wrote:
Interesting, any idea if it is possible to do assignment
within template.. Either:
printVars!(int abc=5,string def="58")();
or something like
printVars!("abc","def",ghi)(5,"58");
What would the use-cases for those be?
I don't think the first is valid grammar, and I'm not sure what
you want the second to do. Resolve symbols by string literals
of their names? That might need a string mixin as they wouldn't
be in scope when in the called template function, but I've
never tried it.
Both use cases are when you want a named parameter, without
having to assign it first. I know the first is not valid grammar,
was just wondering if you might be smarter than me and see a way
to make it valid :)
Second one is another possible alternative that I have been
thinking about.
Basically, say I want to have the named (optional) parameters x
and y. In your initial example I would be required to do:
```
int x = 1;
string y = "2";
doSomethingWithNamedPars!(x,y)();
```
I just hoped to shorten that to a one liner similar to:
```
doSomethingWithNamedPars!(x=1,y="2")();
```
or alternatively
```
doSomethingWithNamedPars!("x","y")(1,"2");
```
(where doSomethingWithNamedPars's behaviour depends on which
named parameters it is passed)
Just as a reference, my current approach (in ggplotd) is with
named tuples, but that is slightly more verbose than I had hoped:
```
doSomethingWithNamedPars( Tuple!(int, "x", string, "y")( 1, 2 ) );
```
