On Sunday, 25 March 2018 at 21:31:16 UTC, aliak wrote:
On Sunday, 25 March 2018 at 19:06:14 UTC, Vladimirs Nordholm
wrote:
On Sunday, 25 March 2018 at 18:24:37 UTC, Vladimirs Nordholm
wrote:
The underlying problems are:
* How do I ensure the two first arguments (used as
coordinates) are types of numbers (all kinds: ints, floats,
reals, etc.)
* At least one argument is passed after the coordinates
I found a solution which satisfies my needs :)
void foo(X, Y, Args...)(X x, Y y, Args args)
if (__traits(isArithmetic, x) && __traits(isArithmetic, y)
&& args.length >= 1)
{
// ...
}
FYI there's also
https://dlang.org/library/std/traits/is_numeric.html incase you
haven't see it -takes in to account bools and chars, which
depending on your usecase you may not want to count as
arithmetic.
Cheers
- Ali
Thanks Ali, I had not thought about chars, bools, etc.
However I do not understand how to use that with my arguments.
Eg. I would expect to do something like:
void foo(X, Y, Args...)(X x, Y y, Args args)
if(isNumeric!(x) && isNumeric!(y) && args.length >= 1)
{
// ...
}
gives the error
template instance isNumeric!(x) does not match template
declaration isNumeric(T)
How would I resolve this issue?
