Non-English characters in code - "character 0x2212 is not a valid token"

[pineapple via Digitalmars-d-learn]

I experimented with using the character 'ħ' in a variable name, 
and wasn't terribly surprised when the compiler didn't like it. 
What did surprise me is that I still got a compile error even 
when the character was in a comment. Is there any way to make dmd 
not get fussy about unicode?