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gmpreussner/gist:42316c11c9c6d4479d21

Created October 18, 2015 06:42
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Bug with generics/concepts
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gistfile1.txt
type
Foo[T] = concept x, y
foo(x, y) is bool
Bar[T] = object
b: T
when true: # the following works
proc foo(x, y: Bar): bool = true
when false: # this does not (unit test fails)
proc foo(x, y: Bar): bool = x.b < y.b
when false: # workaround
proc foo(x, y: Bar): bool = result = x.b < y.b
test "foo":
check(Bar[int] is Foo[int])
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Not sure if this is a problem with concepts, generics, or type inference, or a combination of those.

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