close #8558(add testcase for #8558) (#15872)

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flywind 2020-11-07 15:59:47 +08:00 • committed by GitHub
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26
tests/concepts/t8558.nim Normal file
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@ -0,0 +1,26 @@
discard """
output: '''10
9
8
7
6
5
4
3
2
1
go!
'''
"""
type Integral = concept x
x == 0 is bool
x - 1 is type(x)
proc countToZero(n: Integral) =
if n == 0: echo "go!"
else:
echo n
countToZero(n-1)
countToZero(10)