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Define precision for Dual #580

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merged 4 commits into from
Apr 24, 2022
Merged

Define precision for Dual #580

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d07417f
Define `precision` for `Dual`
devmotion Mar 8, 2022
930694e
Fix support of `base` keyword argument
devmotion Mar 8, 2022
818936a
Fix typo
devmotion Mar 8, 2022
8fd9293
Yet another typo...
devmotion Mar 8, 2022
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2 changes: 1 addition & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
name = "ForwardDiff"
uuid = "f6369f11-7733-5829-9624-2563aa707210"
version = "0.10.25"
version = "0.10.26"

[deps]
CommonSubexpressions = "bbf7d656-a473-5ed7-a52c-81e309532950"
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12 changes: 12 additions & 0 deletions src/dual.jl
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Expand Up @@ -262,6 +262,18 @@ Base.copy(d::Dual) = d
Base.eps(d::Dual) = eps(value(d))
Base.eps(::Type{D}) where {D<:Dual} = eps(valtype(D))

# The `base` keyword was added in Julia 1.8:
# https://github.com/JuliaLang/julia/pull/42428
if VERSION < v"1.8.0-DEV.725"
Base.precision(d::Dual) = precision(value(d))
Base.precision(::Type{D}) where {D<:Dual} = precision(valtype(D))
else
Base.precision(d::Dual; base::Integer=2) = precision(value(d); base=base)
function Base.precision(::Type{D}; base::Integer=2) where {D<:Dual}
precision(valtype(D); base=base)
end
end

function Base.nextfloat(d::ForwardDiff.Dual{T,V,N}) where {T,V,N}
ForwardDiff.Dual{T}(nextfloat(d.value), d.partials)
end
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11 changes: 11 additions & 0 deletions test/DualTest.jl
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Expand Up @@ -105,6 +105,17 @@ for N in (0,3), M in (0,4), V in (Int, Float32)
@test eps(NESTED_FDNUM) === eps(PRIMAL)
@test eps(typeof(NESTED_FDNUM)) === eps(V)

@test precision(FDNUM) === precision(PRIMAL)
@test precision(typeof(FDNUM)) === precision(V)
@test precision(NESTED_FDNUM) === precision(PRIMAL)
@test precision(typeof(NESTED_FDNUM)) === precision(V)
if VERSION >= v"1.8.0-DEV.725" # https://github.com/JuliaLang/julia/pull/42428
@test precision(FDNUM; base=10) === precision(PRIMAL; base=10)
@test precision(typeof(FDNUM); base=10) === precision(V; base=10)
@test precision(NESTED_FDNUM; base=10) === precision(PRIMAL; base=10)
@test precision(typeof(NESTED_FDNUM); base=10) === precision(V; base=10)
end

@test floor(Int, FDNUM) === floor(Int, PRIMAL)
@test floor(Int, FDNUM2) === floor(Int, PRIMAL2)
@test floor(Int, NESTED_FDNUM) === floor(Int, PRIMAL)
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