On Monday, 8 June 2015 at 04:02:26 UTC, WhatMeWorry wrote:
On Sunday, 7 June 2015 at 23:13:14 UTC, anonymous wrote:
On Sunday, 7 June 2015 at 23:08:02 UTC, WhatMeWorry wrote:
However, when I try to add a simple constraint to the
function like so:
int arrayByteSize(T)(T[] someArray) if (isDynamicArray(T))
You forgot an exclamation mark here. Make that:
isDynamicArray!(T)
Thanks, but I still can't get out of the woods. I've distilled
everything down to the following:
------------------------------------------------------------------
int arrayByteSize(T)(T[] someArray)
{
ubyte[] arr = cast(ubyte[]) someArray;
return arr.length;
}
int i = arrayByteSize(dynamicArray); // works with above
function.
------------------------------------------------------------------
However, if I just add a constraint to the function template
int arrayByteSize(T)(T[] someArray)
if (isDynamicArray!(T))
{
ubyte[] arr = cast(ubyte[]) someArray;
return arr.length;
}
int i = arrayByteSize(dynamicArray); // Same call - all hell
breaks loose.
Error arrayByteSize(T)(T[] someArray) if (isDynamicArray!T)
Error: template compilelinkshaders.arrayByteSize cannot deduce
function from argument types !()(float[]), candidates are:
Why would a working function call stop working just because a
constraint was added to the function?
Oops, I posted before I say Mr. Ruppe's comment.
Also, if you pass int[] to that function, for example, T will
*not* be int[] - it will actually be int.
(T)(T[])
means take an array of T. If you pass int[], it is an array of
int, so that's why T is just int instead of an array.
You probably want to remove that [] from the signature.
------------------------------------------------------------
My code seems to be working fine, or is that just by accident?
float[] dynamicArray = [1.0, 0.0, 1.0];
int i = arrayByteSize(dynamicArray);
myLog!dynamicArray;
dynamicArray = [1, 0, 1]
------------------------------------------------------------
I was trying to draw inspiration from the TDPL with Andrei's
function
T[] find(T, E) (T[] haystack, E needle)...
