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discard """
output: "4"
"""
type
TFoo = object
data: array[0..100, int]
TSecond = distinct TFoo
proc `[]` (self: var TFoo, x: int): var int =
return self.data[x]
proc `[]=` (self: var TFoo, x, y: int) =
# only `[]` returning a 'var T' seems to not work for now :-/
self.data[x] = y
proc second(self: var TFoo): var TSecond =
return TSecond(self)
proc `[]`(self: var TSecond, x: int): var int =
return TFoo(self).data[2*x]
var f: TFoo
for i in 0..f.data.high: f[i] = 2 * i
echo f.second[1]
#echo `second[]`(f,1)
# this is the only way I could use it, but not what I expected
|
