Artem Chikin 7aed042817 Add fix on Keypath -> Function with multiple arguments type mismatch. ...

When simplifying a keypath constraint with a function type binding, single-parameter functions have the parameter type and the return type matched against the keypath root and value; whereas multiple-parameter functions cause an ambiguous failure (in `simplifyKeyPathConstraint`).

Resolves rdar://problem/57930643

2020-05-06 19:15:08 -07:00

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