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hashing.jl
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hashing.jl
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# This file is a part of Julia. License is MIT: https://julialang.org/license
types = Any[
Bool,
Int8, UInt8, Int16, UInt16, Int32, UInt32, Int64, UInt64, Float32, Float64,
Rational{Int8}, Rational{UInt8}, Rational{Int16}, Rational{UInt16},
Rational{Int32}, Rational{UInt32}, Rational{Int64}, Rational{UInt64}
]
vals = vcat(
typemin(Int64),
-Int64(maxintfloat(Float64))+Int64[-4:1;],
typemin(Int32),
-Integer(maxintfloat(Float32))+(-4:1),
-2:2,
Integer(maxintfloat(Float32))+(-1:4),
typemax(Int32),
Int64(maxintfloat(Float64))+Int64[-1:4;],
typemax(Int64),
)
function coerce(T::Type, x)
if T<:Rational
convert(T, coerce(typeof(numerator(zero(T))), x))
elseif !(T<:Integer)
convert(T, x)
else
x % T
end
end
for T=types[2:end], x=vals
a = coerce(T,x)
@test hash(a,zero(UInt)) == invoke(hash, Tuple{Real, UInt}, a, zero(UInt))
end
for T=types, S=types, x=vals
a = coerce(T,x)
b = coerce(S,x)
#println("$(typeof(a)) $a")
#println("$(typeof(b)) $b")
@test isequal(a,b) == (hash(a)==hash(b))
# for y=vals
# println("T=$T; S=$S; x=$x; y=$y")
# c = convert(T,x//y)
# d = convert(S,x//y)
# @test !isequal(a,b) || hash(a)==hash(b)
# end
end
# issue #8619
@test hash(nextfloat(2.0^63)) == hash(UInt64(nextfloat(2.0^63)))
@test hash(prevfloat(2.0^64)) == hash(UInt64(prevfloat(2.0^64)))
# issue #9264
@test hash(1//6,zero(UInt)) == invoke(hash, Tuple{Real, UInt}, 1//6, zero(UInt))
@test hash(1//6) == hash(big(1)//big(6))
@test hash(1//6) == hash(0x01//0x06)
# hashing collections (e.g. issue #6870)
vals = Any[
[1,2,3,4], [1 3;2 4], Any[1,2,3,4], [1,3,2,4],
[1,0], [true,false], BitArray([true,false]),
Set([1,2,3,4]),
Set([1:10;]), # these lead to different key orders
Set([7,9,4,10,2,3,5,8,6,1]), #
Dict(42 => 101, 77 => 93), Dict{Any,Any}(42 => 101, 77 => 93),
(1,2,3,4), (1.0,2.0,3.0,4.0), (1,3,2,4),
("a","b"), (SubString("a",1,1), SubString("b",1,1)),
# issue #6900
Dict(x => x for x in 1:10),
Dict(7=>7,9=>9,4=>4,10=>10,2=>2,3=>3,8=>8,5=>5,6=>6,1=>1),
[], [1], [2], [1, 1], [1, 2], [1, 3], [2, 2], [1, 2, 2], [1, 3, 3],
zeros(2, 2), spzeros(2, 2), eye(2, 2), speye(2, 2),
sparse(ones(2, 2)), ones(2, 2), sparse([0 0; 1 0]), [0 0; 1 0],
[-0. 0; -0. 0.], SparseMatrixCSC(2, 2, [1, 3, 3], [1, 2], [-0., -0.])
]
for a in vals, b in vals
@test isequal(a,b) == (hash(a)==hash(b))
end
@test hash(SubString("--hello--",3,7)) == hash("hello")
@test hash(:(X.x)) == hash(:(X.x))
@test hash(:(X.x)) != hash(:(X.y))
@test hash([1,2]) == hash(view([1,2,3,4],1:2))
# test explicit zeros in SparseMatrixCSC
x = sprand(10, 10, 0.5)
x[1] = 1
x.nzval[1] = 0
@test hash(x) == hash(Array(x))
let a = QuoteNode(1), b = QuoteNode(1.0)
@test (hash(a)==hash(b)) == (a==b)
end
let a = Expr(:block, TypedSlot(1, Any)),
b = Expr(:block, TypedSlot(1, Any)),
c = Expr(:block, TypedSlot(3, Any))
@test a == b && hash(a) == hash(b)
@test a != c && hash(a) != hash(c)
@test b != c && hash(b) != hash(c)
end
@test hash(Dict(),hash(Set())) != hash(Set(),hash(Dict()))
# issue 15659
for prec in [3, 11, 15, 16, 31, 32, 33, 63, 64, 65, 254, 255, 256, 257, 258, 1023, 1024, 1025],
v in Any[-0.0, 0, 1, -1, 1//10, 2//10, 3//10, 1//2, pi]
setprecision(prec) do
x = convert(BigFloat, v)
@test precision(x) == prec
num, pow, den = Base.decompose(x)
y = num*big(2.0)^pow/den
@test precision(y) == prec
@test isequal(x, y)
end
end
# issue #20744
@test hash(:c, hash(:b, hash(:a))) != hash(:a, hash(:b, hash(:c)))