From 96b290d142d5fe21b62e78b0cb0abe2a226ea79c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Designolle?=
 <sebastien.designolle@gmail.com>
Date: Thu, 27 Jun 2024 22:39:19 +0200
Subject: [PATCH] Fix type signatures of entropy functions

---
 src/entropy.jl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/entropy.jl b/src/entropy.jl
index d0f9c91..75eaa0a 100755
--- a/src/entropy.jl
+++ b/src/entropy.jl
@@ -1,4 +1,4 @@
-_log(base::Real, x) = x > 0 ? log(base, x) : zero(x)
+_log(base::Real, x::Real) = x > 0 ? log(base, x) : zero(x)
 
 """
     relative_entropy([base=2,] ρ::AbstractMatrix, σ::AbstractMatrix)
@@ -7,7 +7,7 @@ Computes the (quantum) relative entropy tr(`ρ` (log `ρ` - log `σ`)) between p
 
 Reference: [Quantum relative entropy](https://en.wikipedia.org/wiki/Quantum_relative_entropy).
 """
-function relative_entropy(base::Real, ρ::AbstractMatrix{T}, σ::AbstractMatrix{S}) where {T,S}
+function relative_entropy(base::Real, ρ::AbstractMatrix{T}, σ::AbstractMatrix{S}) where {T<:Real,S<:Real}
     R = real(promote_type(T, S))
     if size(ρ) != size(σ)
         throw(ArgumentError("ρ and σ have the same size."))
@@ -40,7 +40,7 @@ Computes the relative entropy D(`p`||`q`) = Σᵢpᵢlog(pᵢ/qᵢ) between two
 
 Reference: [Relative entropy](https://en.wikipedia.org/wiki/Relative_entropy).
 """
-function relative_entropy(base::Real, p::AbstractVector{T}, q::AbstractVector{S}) where {T,S<:Real}
+function relative_entropy(base::Real, p::AbstractVector{T}, q::AbstractVector{S}) where {T<Real,S<:Real}
     R = promote_type(T, S)
     if length(p) != length(q)
         throw(ArgumentError("`p` and q must have the same length."))