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[Bridges] fix modifying SplitIntervaBridge with Interval(-Inf, Inf) #3073

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Merged
odow merged 1 commit into from
Sep 7, 2026
+18 −0
Merged

[Bridges] fix modifying SplitIntervaBridge with Interval(-Inf, Inf) #3073

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6 changes: 6 additions & 0 deletions src/Bridges/Constraint/bridges/SplitIntervalBridge.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -354,6 +354,9 @@ function MOI.modify(
if bridge.upper !== nothing
MOI.modify(model, bridge.upper, change)
end
if bridge.lower === bridge.upper === nothing
bridge.func = MOI.Utilities.modify_function(bridge.func, change)
end
return
end

Expand All @@ -369,6 +372,9 @@ function MOI.set(
if bridge.upper !== nothing
MOI.set(model, MOI.ConstraintFunction(), bridge.upper, func)
end
if bridge.lower === bridge.upper === nothing
bridge.func = func
end
return
end

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12 changes: 12 additions & 0 deletions test/Bridges/Constraint/test_SplitIntervalBridge.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -523,6 +523,18 @@ function test_modify_set()
return
end

function test_split_interval_free_modify()
inner = MOI.Utilities.Model{Float64}()
model = MOI.Bridges.Constraint.SplitInterval{Float64}(inner)
x, y = MOI.add_variable(model), MOI.add_variable(model)
ci = MOI.add_constraint(model, 1.0 * x, MOI.Interval(-Inf, Inf))
MOI.modify(model, ci, MOI.ScalarCoefficientChange(y, 2.0))
@test ≈(MOI.get(model, MOI.ConstraintFunction(), ci), 1.0 * x + 2.0 * y)
MOI.set(model, MOI.ConstraintFunction(), ci, 3.0 * x + 4.0 * y)
@test ≈(MOI.get(model, MOI.ConstraintFunction(), ci), 3.0 * x + 4.0 * y)
return
end

end # module

TestConstraintSplitInterval.runtests()
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