Talk:Sum data type
Perhaps needs more specification – a concrete and focused task ?
Always helpful (for any useful contrast / comparability of submissions) to have a problem to solve, and a suggested input, with expected output.
Perhaps something which requires simple option types of the Maybe or Either variety ? Hout (talk) 10:20, 25 June 2019 (UTC)
Or requires and uses the construction of trees with sum type nodes ? Hout (talk) 10:23, 25 June 2019 (UTC)