JuMP constraints independent of a particular model

Specific Domains Optimization (Mathematical)
9

One way to achieve that is as follows:

function build_model(flag::Bool)
    model = Model()
    @variable(model, x)
    if flag
        @constraint(model, x >= 0)
    end
    @objective(model, Min, x)
    return model
end

Projects like PowerModels.jl very successfully use this approach to automatically build JuMP models that depend on the context.

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