This seems to be a somewhat efficient string splitter
http://dpaste.dzfl.pl/4307aa5f
The basic idea is
for(int j = 0; j < s.length; j++)
{
mixin(ExpandVariadicIf!("??Cs[j]??s[j..min(s.length-1, j +
%%L)]::", "d", "
if (r.length <= i) r.length += 5;
if (j != 0)
{
r[i++] = s[oldj..j];
oldj = j + %%L;
}
else
oldj = %%L;
j += %%L; continue;", T));
}
ExpandVariadicIf creates a series of if's for each variadic
argument. There is some strange formatting(just some crap I threw
together to get something working) but it boils down to
generating compile time code that minimizes computations and
lookups by directly using the known compile time literals passed.
IMO these types of functions seem useful but ATM are just hacks.
Hopefully there is a better way to do these sorts of things as I
find them pretty useful.
One of the big issues not being able to pass a variadic variable
to a template directly which is why the formatting string is
necessary(You can pass the typetuple to get the types and size
but not the compile time values if they exist.
I think int this case a variadic alias would be very useful.
alias T... => alias T0, alias T1, etc....
(e.g. T[0] is an alias, T.length is number of aliases, etc...)
In any case, maybe someone has a good way to make these things
easier and more useful. Being able to handle variadic types and
values in a consistent and simple way will make them moreful.
