Filter the set of overloads before checking them #526
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Alasdair
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Construct a tree of possible overloadings whenever we find an E_app node that is overloaded, then filter any which are not possible. We do this by doing a simple check on the shape of the argument types. If they can't possibly match then we discard that overload.
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Construct a tree of possible overloadings whenever we find an E_app node that is overloaded, then filter any which are not possible. We do this by doing a simple check on the shape of the argument types. If they can't possibly match then we discard that overload.