On Tue, 11 Feb 2014 19:16:31 -0000, Steven Schveighoffer
<schvei...@yahoo.com> wrote:
On Tue, 11 Feb 2014 05:10:27 -0500, Regan Heath <re...@netmail.co.nz>
wrote:
Things like this should "just work"..
File input ...
auto range = input.byLine();
while(!range.empty)
{
range.popFront();
foreach (i, line; range.take(4)) //Error: cannot infer argument
types
{
..etc..
}
range.popFront();
}
Tried adding 'int' and 'char[]' or 'auto' .. no dice.
Can someone explain why this fails, and if this is a permanent or
temporary limitation of D/MD.
This is only available using opApply style iteration. Using range
iteration does not give you this ability.
It's not a permanent limitation per se, but there is no plan at the
moment to add multiple parameters to range iteration.
One thing that IS a limitation though: we cannot overload on return
values. So the obvious idea of overloading front to return tuples of
various types, would not be feasible. opApply can do that because the
delegate is a parameter.
Thanks for the concise/complete response. I had managed to piece this
together from other replies but it's clearer now.
R
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