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- discard """
- output: '''1
- 2
- 3
- 4
- 5
- 6
- a
- b
- t
- e
- s
- t
- '''
- """
- template accept(e) =
- static: assert compiles(e)
- template reject(e) =
- static: assert(not compiles(e))
- type
- Container[T] = concept c
- c.len is Ordinal
- items(c) is T
- for value in c:
- type(value) is T
- proc takesIntContainer(c: Container[int]) =
- for e in c: echo e
- takesIntContainer(@[1, 2, 3])
- reject takesIntContainer(@["x", "y"])
- proc takesContainer(c: Container) =
- for e in c: echo e
- takesContainer(@[4, 5, 6])
- takesContainer(@["a", "b"])
- takesContainer "test"
- reject takesContainer(10)
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