Bug 2684 – Associative arrays have wrong opIndex signatures

void main() { int[string] x; char[] y; if (y in x){} int z = x[y]; } The last two lines do not compile. However it makes of course sense to look up for a char[] or const(char)[] in a hash keyed by immutable(char)[]. Only the operator that inserts stuff into the hash should force the type immutable(char)[]. Bottom line: if the type of the key is K, any type K1 that allows comparison for equality and less-than with K should be accepted for lookup.

Fixed dmd 2.026