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accept Number in Exponential #1691

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accept Number in Exponential #1691

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2c0a579
accept Numer in Exponential
rafaqz Mar 8, 2023
419120e
Update src/univariate/continuous/exponential.jl
rafaqz Sep 11, 2023
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13 changes: 9 additions & 4 deletions src/univariate/continuous/exponential.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -21,13 +21,18 @@ External links
* [Exponential distribution on Wikipedia](http://en.wikipedia.org/wiki/Exponential_distribution)

"""
struct Exponential{T<:Real} <: ContinuousUnivariateDistribution
struct Exponential{T<:Number} <: ContinuousUnivariateDistribution
θ::T # note: scale not rate
Exponential{T}(θ::T) where {T} = new{T}(θ)
end

function Exponential(θ::Real; check_args::Bool=true)
@check_args Exponential (θ, θ > zero(θ))
function Exponential(θ::Number; check_args::Bool=true)
@check_args(
Exponential,
(!(θ isa Complex), "Complex not allowed for θ"),
(isreal(θ), "θ must be a real number"),
(θ, θ > zero(θ)),
)
return Exponential{typeof(θ)}(θ)
end

Expand All @@ -37,7 +42,7 @@ Exponential() = Exponential{Float64}(1.0)
@distr_support Exponential 0.0 Inf

### Conversions
convert(::Type{Exponential{T}}, θ::S) where {T <: Real, S <: Real} = Exponential(T(θ))
convert(::Type{Exponential{T}}, θ::S) where {T <: Number, S <: Number} = Exponential(convert(T, θ))
function Base.convert(::Type{Exponential{T}}, d::Exponential) where {T<:Real}
return Exponential(T(d.θ))
end
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