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Fix methods for calling value on a ::Number #3776

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merged 1 commit into from
Jun 17, 2024
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Fix methods for calling value on a ::Number #3776

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8 changes: 6 additions & 2 deletions src/variables.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -2457,8 +2457,12 @@ function value(::AbstractArray{<:AbstractJuMPScalar})
)
end

value(::_MA.Zero) = 0.0
value(x::Number) = x
# Fallback. See JuMP#3775
value(::_MA.Zero; result::Int = 1) = 0.0

value(x::Number; result::Int = 1) = x

value(::Function, x::Number) = x

function _info_from_variable(v::GenericVariableRef)
has_lb = has_lower_bound(v)
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11 changes: 11 additions & 0 deletions test/test_variable.jl
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Expand Up @@ -1651,4 +1651,15 @@ function test_variable_normalized_coefficient_vector_quadratic()
return
end

function test_value_number()
model = Model()
@variable(model, x, start = 2)
@expression(model, expr[i in 0:2], (1 + x)^i)
y = Containers.DenseAxisArray([1, 3, 9], 0:2)
@test ≈(value.(start_value, expr), y)
@test value(expr[0]; result = 1) == 1
@test value(expr[0]; result = 2) == 1
return
end

end # module TestVariable
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