That's because on the right and @[A, T, T, G, C] is a `seq[Nucleotide], the
type is inferred from the type of the first item.
If you explicitly ask for a DNANuc on the first item it will work, for instance:
type
Nucleotide = enum
T, A, G, C, U
DNANuc = range[T..C]
RNANuc = range[A..U]
echo high(DNANuc)
var dnaseq1: seq[DNANuc] = @[]
dnaseq1.add(A)
dnaseq1.add(T)
dnaseq1.add(T)
dnaseq1.add(G)
dnaseq1.add(C)
echo dnaseq1
# the following line gives a type mismatch error
var dnaseq2: seq[DNANuc] = @[DNANuc A, T, T, G, C]
echo dnaseq2
Run
