tgorordo/WignerSymbols.jl
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speed improvement plus v0.7 compatibility

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This commit is contained in:
Jutho Haegeman 2018-01-31 17:10:37 +08:00
parent 21688c9a2b
commit cdb460332c
4 changed files with 19 additions and 4 deletions
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14
src/halfinteger.jl
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@ -30,6 +30,20 @@ Base.convert(T::Type{<:Rational}, s::HalfInteger) = convert(T, s.num//2)
Base.convert(T::Type{<:Real}, s::HalfInteger) = convert(T, s.num/2)
Base.convert(::Type{HalfInteger}, s::HalfInteger) = s
function Base.hash(a::HalfInteger, h::UInt)
iseven(a.num) && return hash(a.num>>1, h)
num, den = a.num, 2
den = 1
pow = -1
if abs(num) < 9007199254740992
return hash(ldexp(Float64(num),pow), h)
end
h = Base.hash_integer(den, h)
h = Base.hash_integer(pow, h)
h = Base.hash_integer(num, h)
return h
end
Base.isinteger(a::HalfInteger) = iseven(a.num)
ishalfinteger(a::HalfInteger) = true
ishalfinteger(a::Integer) = true