tgorordo/WignerSymbols.jl
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update HalfInteger

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This commit is contained in:
Jutho 2018-10-05 17:20:22 +02:00
parent 8854cfbb97
commit 39bbd0ced8
2 changed files with 38 additions and 3 deletions
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13
src/halfinteger.jl
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@ -21,11 +21,18 @@ function Base.convert(::Type{HalfInteger}, r::Rational)
elseif r.den == 2
return HalfInteger(r.num)
else
throw(InexactError())
throw(InexactError(:HalfInteger, HalfInteger, r))
end
end
Base.convert(::Type{HalfInteger}, r::Real) = convert(HalfInteger, convert(Rational, r))
Base.convert(T::Type{<:Integer}, s::HalfInteger) = iseven(s.num) ? convert(T, s.num>>1) : throw(InexactError())
function Base.convert(::Type{HalfInteger}, r::Real)
num = 2*r
if isinteger(num)
return HalfInteger(convert(Int, num))
else
throw(InexactError(:HalfInteger, HalfInteger, r))
end
end
Base.convert(T::Type{<:Integer}, s::HalfInteger) = iseven(s.num) ? convert(T, s.num>>1) : throw(InexactError(Symbol(T), T, s))
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