In std.typecons, in Tuple there are two opCmp functions, that are
almost identical; they only differ by one being const and the
other not:
int opCmp(R)(R rhs)
if (areCompatibleTuples!(typeof(this), R, "<"))
{
static foreach (i; 0 .. Types.length)
{
if (field[i] != rhs.field[i])
{
return field[i] < rhs.field[i] ? -1 : 1;
}
}
return 0;
}
int opCmp(R)(R rhs) const
if (areCompatibleTuples!(typeof(this), R, "<"))
{
static foreach (i; 0 .. Types.length)
{
if (field[i] != rhs.field[i])
{
return field[i] < rhs.field[i] ? -1 : 1;
}
}
return 0;
}
What is the reason for having this? (I guess, that it's because
the function may indirectly call opCmp of other types which may
or may not be const.)
My real question is: Can this code duplication be avoided
somehow? (I ask, because I've got a PR running, which increases
the size of these functions and it doesn't feel good to have two
long, almost identical functions.)
