Fix hashing on Julia 1.10 (#55)

* Test on Julia 1.10

* Clarify condition

* Implement new hashing behavior in Julia 1.10

* Add changelog item

.github/workflows/CI.yml

@@ -25,7 +25,8 @@ jobs:
           - '1.6'
           - '1.7'
           - '1.8'
-          - '~1.9.0-0'
+          - '1.9'
+          - '~1.10.0-0'
           - 'nightly'
         os:
           - ubuntu-latest

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## master
 
+* ![Maintenance](https://img.shields.io/badge/-maintenance-grey) Implement new `hash` behavior on Julia ≥ 1.10. ([#55](https://github.com/sostock/HalfIntegers.jl/pull/55))
+
 ## v1.5.0
 
 * ![Feature](https://img.shields.io/badge/-feature-green) Better support for `Half{T}` where `T` is an integer type that cannot represent the number 2. ([#49](https://github.com/sostock/HalfIntegers.jl/pull/49), [#51](https://github.com/sostock/HalfIntegers.jl/pull/51), [#52](https://github.com/sostock/HalfIntegers.jl/pull/52))

src/HalfIntegers.jl

@@ -294,10 +294,12 @@ hashhalf(x::Integer, h::UInt) = invoke(hash, Tuple{Real,UInt}, half(x), h)
 # Version for integers with ≤ 64 bits, adapted from hash(::Rational{<:Base.BitInteger64}, ::UInt)
 function hashhalf(x::Base.BitInteger64, h::UInt)
     iseven(x) && return hash(x >> 1, h)
-    if abs(x) < 9007199254740992
+    if Base.uabs(x) < UInt64(maxintfloat(Float64))
         return hash(ldexp(Float64(x),-1),h)
     end
-    h = Base.hash_integer(1, h)
+    @static if VERSION < v"1.10.0-DEV.1448"
+        h = Base.hash_integer(1, h)
+    end
     h = Base.hash_integer(-1, h)
     h = Base.hash_integer(x, h)
     return h