kalmar/GroupRings.jl
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fix multiple dispatch of scalar *

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kalmar 2017-06-06 22:29:02 +02:00
parent 962a9e6e73
commit 35fc74e6f2
1 changed files with 5 additions and 4 deletions
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src/GroupRings.jl
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@ -247,17 +247,18 @@ end
(-)(X::GroupRingElem) = GroupRingElem(-X.coeffs, parent(X))
(*){T<:Number}(a::T, X::GroupRingElem{T}) = GroupRingElem(a*X.coeffs, parent(X))
mul{T<:Number}(a::T, X::GroupRingElem{T}) = GroupRingElem(a*X.coeffs, parent(X))
function (*){T<:Number, S<:Number}(a::T, X::GroupRingElem{S})
function mul{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
(*)(X::GroupRingElem, a) = a*X
(*)(a, X::GroupRingElem) = mul(a,X)
(*)(X::GroupRingElem, a) = mul(a,X)
# disallow Nemo.Rings to hijack *(::Integer, ::RingElem)
(*){T<:Integer}(a::T, X::GroupRingElem) = a*X
(*){T<:Integer}(a::T, X::GroupRingElem) = mul(a,X)
(/)(X::GroupRingElem, a) = 1/a*X