22 lines
400 B
Nim
22 lines
400 B
Nim
discard """
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action: run
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"""
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import options
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type Foo = ref object
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i: int
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proc next(foo: Foo): Option[Foo] =
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try: assert(foo.i == 0)
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except: return # 2º: none
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return some(foo) # 1º: some
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proc test =
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let foo = Foo()
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var opt = next(foo) # 1º Some
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while isSome(opt) and foo.i < 10:
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inc(foo.i)
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opt = next(foo) # 2º None
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assert foo.i == 1, $foo.i
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test()
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