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Implement monomial constructor #94

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Merged
merged 1 commit into from
Sep 1, 2025
Merged

Implement monomial constructor #94

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4 changes: 4 additions & 0 deletions src/types.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,10 @@ MP.nvariables(::Type{<:Monomial{V}}) where {V} = length(V)
MP.nvariables(m::Monomial) = nvariables(typeof(m))
MP.monomial_type(::Type{V}) where V<:Variable = monomial_type(V())
MP.monomial_type(v::Variable) = Monomial{(v,), 1}
function MP.monomial(vars::Tuple, exps::NTuple{N,Int}) where {N}
@assert length(vars) == length(exps)
return Monomial{vars,N}(exps)
end

MP.exponents(m::Monomial) = m.exponents
MP.exponent(m::Monomial, i::Integer) = m.exponents[i]
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4 changes: 4 additions & 0 deletions test/polynomials.jl
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Expand Up @@ -97,6 +97,10 @@ end
@test @inferred(Monomial{tuple(), 0}()) == @inferred(x^0)

@test @inferred(Monomial{(x, y)}([1, 2])) == Monomial{(x, y)}((1, 2))
@test @inferred(monomial((x, y), (1, 2))) == Monomial{(x, y)}((1, 2))
@test_throws AssertionError monomial((x,), (1, 2))
@test_throws AssertionError monomial((y, x), (1, 2))
@test_throws AssertionError monomial((x, x), (1, 2))
end

@testset "terms" begin
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