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Emit an error if abstract instances in the implementation of a module do
not have a corresponding concrete instance.
compiler/check_typeclass.m:
Check that abstract instance declarations in the implementation
section of a module have a corresponding concrete instance
declaration somewhere. Emit an error if they don't.
tests/invalid/missing_concrete_instance.{m,err_exp}:
Extend this test case to cover the above situation.
16 lines
245 B
Mathematica
16 lines
245 B
Mathematica
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% rotd-2005-05-12 and before did not emit
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% an error about the missing concrete instance.
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:- module missing_concrete_instance.
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:- interface.
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:- typeclass foo(T) where [].
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:- instance foo(int).
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:- implementation.
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:- instance foo(float).
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