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doma_algae
1.3.1-doma
Bootstrapped algebraic data types for Elixir, forked by doma for maintenance and testing packagesets
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lib/algae/writer/chain.ex
alias Algae.Writer
import TypeClass
use Witchcraft
definst Witchcraft.Chain, for: Algae.Writer do
def chain(%Writer{writer: {old_value, old_log}}, link) do
%Writer{writer: {new_value, new_log}} = link.(old_value)
Writer.new(new_value, old_log <> new_log)
end
end