Bug 13637 – std.utf.decode: index parameter should be able to pass by value

Is it reasonable to pass everywhere when it's possible by *ref* to function even integers? This goes to very stupid bugs. If ref is neded there (but I think it is not) we could use *auto ref* instead for those cases where it's not possible get address of parameter or something else. The above example doesn't compiles because we can't get *ref* for 0 literal import std.stdio, std.utf; void main() { string str = "チ"; writeln(decode(str, 0)); }

Marking as won't fix, see https://github.com/dlang/phobos/pull/4492 for rationale