Add sign(::Type{Int}, ::fmpq) (#1366)

Nemocas · Dec 22, 2022 · 5e06a3d · 5e06a3d
1 parent 3cee149
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diff --git a/src/flint/fmpq.jl b/src/flint/fmpq.jl
@@ -96,6 +96,8 @@ Return the sign of $a$ ($-1$, $0$ or $1$) as a fraction.
 """
 sign(a::fmpq) = fmpq(sign(numerator(a)))
 
+sign(::Type{Int}, a::fmpq) = sign(Int, numerator(a))
+
 function abs(a::fmpq)
    z = fmpq()
    ccall((:fmpq_abs, libflint), Nothing, (Ref{fmpq}, Ref{fmpq}), z, a)

diff --git a/test/flint/fmpq-test.jl b/test/flint/fmpq-test.jl
@@ -118,6 +118,9 @@ end
    @test sign(fmpq(-2, 3)) == -1
    @test sign(fmpq()) == 0
    @test sign(fmpq(1, 7)) == 1
+   @test sign(Int, fmpq(-2, 3)) == -1
+   @test sign(Int, fmpq()) == 0
+   @test sign(Int, fmpq(1, 7)) == 1
 
    @test isone(one(R))