feat: no additional variables during constraint construction #131
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There are three spots in the flatzinc parser & constraint constructors that I believe to contain unnecessary variable creation:
create_domainsforBooleanLessThanOrEqualandBooleanEqualcompile_bool2intIt seems like we can directly used the parsed literals instead of creating a new variable and a linking clause. It only requires access to the underlying
integer_variableof the literal, but I don't see that as a problem. Is there any reason for doing it this way, or is it because of the legacy structure?