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29 lines
576 B
Nim
29 lines
576 B
Nim
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type
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TFoo = object
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data: array[0..100, int]
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TSecond = distinct TFoo
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proc `[]` (self: var TFoo, x: int): var int =
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return self.data[x]
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proc `[]=` (self: var TFoo, x, y: int) =
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# only `[]` returning a 'var T' seems to not work for now :-/
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self.data[x] = y
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proc second(self: var TFoo): var TSecond =
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return TSecond(self)
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proc `[]`(self: var TSecond, x: int): var int =
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return TFoo(self).data[2*x]
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var f: TFoo
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for i in 0..f.data.high: f[i] = 2 * i
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echo f.second[1]
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#echo `second[]`(f,1)
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# this is the only way I could use it, but not what I expected
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