Inconsistent result between 0.17.2 and 0.18.0

[mratsim]

The library is inconsistent between 0.17.2 and 0.18.0 versions:

Test case:

import nimSHA2

var a: SHA256Digest


a[0] = 'a'
a[1] = 'b'
a[10] = 'c'

echo system.`$`(a)
echo nimsha2.`$`(a)
echo $a
echo a.len

O.17.2

ab
ab
ab
32

0.18.0

['a', 'b', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', 'c', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00']
abc
abc
32

I suspect there are at least 2 reasons for this:

1. 0.18.0 defines a $ operator on arrays
2. I don't know why but seems like $in 0.17.2 was not iterating for the full length, stopping at the first 0 and this was fixed.

Recommandation: To avoid the $ issue it might be needed to wrap the digest array in an object like what is done in keccak_tiny

[NotoriousRebel]

Any updates on this?