kalmar/Groups.jl
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actually cache and use savedhash + tests

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This commit is contained in:
kalmarek 2017-10-27 16:16:43 +02:00
parent 5945462d45
commit 04d1591c7d
2 changed files with 17 additions and 4 deletions
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11
src/AutGroup.jl
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@ -201,8 +201,11 @@ end
hash(s::AutSymbol, h::UInt) = hash(s.str, hash(s.pow, hash(:AutSymbol, h)))
function hash(g::AutGroupElem, h::UInt)
gs = gens(parent(g).objectGroup)
return hash(g(gs), hash(typeof(g), hash(parent(g), h)))
if g.modified
g.savedhash = hash(g(gens(parent(g).objectGroup)), hash(typeof(g), hash(parent(g), h)))
g.modified = false
end
return g.savedhash
end
function change_pow(s::AutSymbol, n::Int)
@ -316,7 +319,7 @@ function reduce!(W::AutGroupElem)
end
end
W.modified = false
W.savedhash = hash(W.symbols,hash(typeof(W)))
W.modified = true
return W
end

10
test/AutGroup-tests.jl
View File

@ -149,6 +149,16 @@
b = Groups.flip_autsymbol(2)*A(inv(Groups.rmul_autsymbol(1,2)))
@test a*b == b*a
@test a^3 * b^3 == A()
g,h = Nemo.gens(A)[[1,8]]
domain = Nemo.gens(A.objectGroup)
@test (g*h)(domain) == (h*g)(domain)
@test (g*h).savedhash != (h*g).savedhash
a = g*h
b = h*g
@test hash(a) == hash(b)
@test a.savedhash == b.savedhash
@test length(unique([a,b])) == 1
@test length(unique([g*h, h*g])) == 1
end
@testset "specific Aut(F4) tests" begin