On 17/09/12 14:42, Andrej Mitrovic wrote:
Related: http://d.puremagic.com/issues/show_bug.cgi?id=8676
A lot of code could be stripped if there was a way to set an optional
last parameter for variadics. lockstep could then be written as:
auto newLockstep(Args...)(Args args, StoppingPolicy stoppingPolicy =
StoppingPolicy.shortest)
if (allSatisfy!(isInputRange, staticMap!(Unqual, Args)))
{
static if (Args.length 1)
{
return Lockstep!(Args)(args, stoppingPolicy);
}
else
{
return args[0];
}
}
but if you don't specify the last StoppingPolicy argument at the call
site it won't compile:
foreach (x, y; newLockstep(arr1, arr2)) { }
test.d(32): Error: template test.newLockstep does not match any
function template declaration
test.d(14): Error: template test.newLockstep(Args...) if
(allSatisfy!(isInputRange,staticMap!(Unqual,Args))) cannot deduce
template function from argument types !()(int[],int[])
That just looks like a bug to me. Please enter it in Bugzilla.
