On Friday, 9 March 2018 at 19:24:03 UTC, Nordlöw wrote:
I'm looking for a function (that probably should be placed in
std.meta) named something like `areEqual` that checks whether
all it's arguments are equal or not.
Is there such as function already in Phobos?
My usage is
static if (allEqual!(staticMap!(ElementEncodingType, Rs)))
{
// compare Rs byCodeUnit
}
My current own implementation is
/** Returns: true iff all values $(D V) are the same.
See also:
http://forum.dlang.org/post/iflpslqgrixdjwrlq...@forum.dlang.org
See also:
http://forum.dlang.org/post/mheumktihihfsxxxa...@forum.dlang.org
*/
template allSame(V ...)
if (isExpressions!V)
{
static if (V.length <= 1)
{
enum allSame = true;
}
else static if (V.length & 1)
{
enum allSame = (V[$ - 1] == V[0] &&
V[0 .. $/2] == V[$/2 .. $-1] &&
allSame!(V[0 .. $/2]));
}
else
{
enum allSame = (V[0 .. $/2] == V[$/2 .. $] &&
allSame!(V[0 .. $/2]));
}
}
Should this go into std.meta?
