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#include <seqan3/alphabet/composite/alphabet_variant.hpp>
#include <seqan3/alphabet/gap/gap.hpp>
#include <seqan3/alphabet/nucleotide/all.hpp>
int main()
{
using namespace seqan3::literals;
seqan3::alphabet_variant<seqan3::dna5, seqan3::gap> letter{}; // implicitly 'A'_dna5
seqan3::alphabet_variant<seqan3::dna5, seqan3::gap> letter2{'C'_dna5}; // constructed from alternative (== 'C'_dna5)
seqan3::alphabet_variant<seqan3::dna5, seqan3::gap> letter3{
'U'_rna5}; // constructed from type that alternative is constructible from (== 'T'_dna5)
letter2.assign_char('T'); // == 'T'_dna5
letter2.assign_char('-'); // == gap{}
letter2.assign_char('K'); // unknown characters map to the default/unknown
// character of the first alternative type (== 'N'_dna5)
letter2 = seqan3::gap{}; // assigned from alternative (== gap{})
letter2 = 'U'_rna5; // assigned from type that alternative is assignable from (== 'T'_dna5)
seqan3::dna5 letter4 = letter2.convert_to<seqan3::dna5>();
}
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