%---------------------------------------------------------------------------% % vim: ts=4 sw=4 et ft=mercury %---------------------------------------------------------------------------% :- module instance_unconstrained_tvar. :- interface. :- import_module list. :- typeclass c1(T) where [ ]. :- typeclass c2(T) <= c1(T) where [ ]. :- instance c1(list(T)). :- instance c2(list(T)). :- pred p is det. :- implementation. :- instance c1(list(T)) where []. :- instance c2(list(T)) where []. p :- % The bug that this test case is checking for is at the creation of % the typeclass info for this call, when creating the type-info the % the int (1), the type bindings were not being applied properly. q([1]). :- pred q(T) <= c2(T). :- mode q(in) is det. q(_).