Bug 6864 – Const conversion should precedence over the shared one

BasicTypes can convert shared from/to non-shared with copy, but the shared conversion priority should be lower than const conversions. This means that following code should pass the assertions. int fn( const int n) { return 1; } int fn(shared int n) { return 2; } inout(int) fw(inout int s) { return 1; } inout(int) fw(shared inout int s) { return 2; } int n; assert(fn(n) == 1); assert(fw(n) == 1); shared int sn; assert(fn(sn) == 2); assert(fw(sn) == 2);