started to move to Base.hash for type hashes

Author: matthias314

src/StructEqualHash.jl

@@ -8,9 +8,13 @@ module StructEqualHash
 
 export @struct_equal_hash
 
-Base.@assume_effects :foldable typeid(T::Type) = objectid(T)
-
-typehash(::Type{T}, h::UInt = UInt(0)) where T = hash(3*h-typeid(T))
+if VERSION < v"1.11"
+    Base.@assume_effects :foldable typeid(T::Type) = objectid(T)
+    typehash(::Type{T}, h::UInt = UInt(0)) where T = hash(typeid(T), h)
+else
+    # `hash(T, h)` should work, but we have to work around julia#58395
+    typehash(::Type{T}, h::UInt = UInt(0)) where T = hash(hash(T), h)
+end
 
 totuple(x, fields) = map(name -> getfield(x, name), fields)
 totuple(x::T, ::Missing) where T = totuple(x, fieldnames(T))