On 09/29/2016 11:28 PM, Ilya Yaroshenko wrote:
On Thursday, 29 September 2016 at 20:57:00 UTC, ag0aep6g wrote:
[...]
void foo(size_t n)(size_t[n] a ...) { /* ... */ }
Just found an example, where this approach does not work :-(
template transposed(Dimensions...)
if (Dimensions.length)
{
Slice!(N, Range) transposed(size_t N, Range)(auto ref Slice!(N,
Range) slice)
{
...
}
}
When the values themselves are known at compile time, we can convert
them to size_t before generating the function:
----
enum isIndex(T) = is(T == size_t); /* by pineapple */
enum asIndex(size_t value) = value;
template transposed(Dimensions...)
if (Dimensions.length)
{
import std.meta: allSatisfy, staticMap;
static if (allSatisfy!(isIndex, typeof(Dimensions)))
{
void transposed() {} /* simplified for the example */
}
else
{
alias transposed = transposed!(staticMap!(asIndex, Dimensions));
}
}
alias t1 = transposed!(1, 2, 3);
alias t2 = transposed!(1LU, 2LU, 3LU);
static assert(&t1 == &t2); /* passes */
----
