8 Oct
2021
8 Oct
'21
2:54 p.m.
On Fri, Oct 8, 2021 at 10:51 AM Ben Gamari
In my mind the fundamental problem with this approach is that it means that a program's acceptance by the compiler hinges upon pragmas. This is a rather significant departure from the status quo, where one can remove all pragmas and still end up with a well-formed program. In this sense, pragmas aren't really part of the Haskell language but are rather bits of interesting metadata that the compiler may or may not pay heed to.
I don't believe this is really the status quo. In particular, the pragmas relating to overlapping instances definitely do affect whether a program type-checks or not.