Re: Problem with default values for a generic parameter

[jibal]

The error message seems strange, but you really can't expect this to work. At 
compile time, width and height are UILength, not UIAbsLength, so your when 
tests will fail. You need a template if you want to generate different code 
depending on the type at the call site. And if you want the decision to be made 
at run time then you need a discriminated type ... a float32 only contains the 
32 value bits, not any type information.