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Error when a concept-bound generic function argument is a tuple #9573

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dawkot opened this issue Oct 30, 2018 · 0 comments

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dawkot commented Oct 30, 2018

type Tuple2Like[A, B] = concept c
  c[0] is A
  c[1] is B

assert (int, char) is Tuple2Like[int, char]

func foo(x: Tuple2Like) = discard

foo((0, 'a')) # "no tuple type for constructor" error

krux02 added the Concepts label

timotheecour mentioned this issue

enableif: simpler and more powerful alternative to concepts #12048

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