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import std/private/digitsutils
template main =
block: # digits10
doAssert digits10(0'u64) == 1
# checks correctness on all powers of 10 + [0,-1,1]
var x = 1'u64
var num = 1
while true:
# echo (x, num)
doAssert digits10(x) == num
doAssert digits10(x+1) == num
if x > 1:
doAssert digits10(x-1) == num - 1
num += 1
let xOld = x
x *= 10
if x < xOld:
# wrap-around
break
static: main()
main()
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