kalmar/GroupRings.jl
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multiple dispatch of * instead of scalar mult

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kalmar 2017-06-06 18:44:00 +02:00
parent 1e75372068
commit 292806db17
1 changed files with 3 additions and 4 deletions
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src/GroupRings.jl
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@ -245,18 +245,17 @@ end
(*){T<:Number}(a::T, X::GroupRingElem{T}) = GroupRingElem(a*X.coeffs, parent(X))
function scalar_mult{T<:Number, S<:Number}(a::T, X::GroupRingElem{S})
function (*){T<:Number, S<:Number}(a::T, X::GroupRingElem{S})
promote_type(T,S) == S || warn("Scalar and coeffs are in different rings! Promoting result to $(promote_type(T,S))")
return GroupRingElem(a*X.coeffs, parent(X))
end
(*)(a, X::GroupRingElem) = scalar_mult(a, X)
(*)(X::GroupRingElem, a) = a*X
# disallow Nemo.Rings to hijack *(::Integer, ::RingElem)
(*){T<:Integer}(a::T, X::GroupRingElem) = scalar_mult(a, X)
(*){T<:Integer}(a::T, X::GroupRingElem) = a*X
(/)(X::GroupRingElem, a) = scalar_mult(1/a, X)
(/)(X::GroupRingElem, a) = 1/a*X
function (//){T<:Integer, S<:Integer}(X::GroupRingElem{T}, a::S)
U = typeof(X[1]//a)