Adding and resizing in one step

I see, that the construct (slice of a type conversion function) is supported in Quartus 12, with or without VHDL 2008 activation.

In Quartus V9.0, the expression is accepted without throwing an error, but doesn't assign a value to the LHS. A slice of a regular function call works in Quartus 9.

I don't think that the slice of a type conversion function is a VHDL 2008 feature. It's something that you can read into the general properties of a "globally static primary", although I never found it mentioned in literature.

Thanks for suggesting the interesting construct.