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Duals in the boundary values: avoid infinite recursion #61

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Merged
merged 2 commits into from
Oct 23, 2022
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Duals in the boundary values: avoid infinite recursion #61

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c88a5fd
Duals in the boundary values: avoid infinite recursion
ChrisRackauckas Oct 20, 2022
89ebd45
handle complex bigfloat
ChrisRackauckas Oct 21, 2022
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11 changes: 5 additions & 6 deletions src/gausskronrod.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -250,15 +250,14 @@ const rulecache = Dict{Type,Dict}(
# for BigFloat rules, we need a separate cache keyed by (n,precision)
const bigrulecache = Dict{Tuple{Int,Int}, NTuple{3,Vector{BigFloat}}}()

cachedrule(::Type{T}, n::Integer) where {T<:Number} = cachedrule(typeof(float(real(one(T)))), n::Integer)

function cachedrule(::Type{BigFloat}, n::Integer)
function cachedrule(::Union{Type{BigFloat},Type{Complex{BigFloat}}}, n::Integer)
key = (n, precision(BigFloat))
haskey(bigrulecache, key) ? bigrulecache[key] : (bigrulecache[key] = kronrod(BigFloat, n))
end

# use a generated function to make this type-stable
@generated function cachedrule(::Type{T}, n::Integer) where {T<:AbstractFloat}
cache = haskey(rulecache, T) ? rulecache[T] : (rulecache[T] = Dict{Int,NTuple{3,Vector{T}}}())
@generated function cachedrule(::Type{T}, n::Integer) where {T<:Number}
TF = typeof(float(real(one(T))))
cache = haskey(rulecache, TF) ? rulecache[TF] : (rulecache[TF] = Dict{Int,NTuple{3,Vector{TF}}}())
:(haskey($cache, n) ? $cache[n] : ($cache[n] = kronrod($T, n)))
end
end