define fallback inv(x::AbstractIrrational) (JuliaLang#31068)

close JuliaLang#30882
jonathanvdc · Feb 15, 2019 · f9c7716 · f9c7716
1 parent e62b492
commit f9c7716
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diff --git a/base/irrationals.jl b/base/irrationals.jl
@@ -185,3 +185,6 @@ function alignment(io::IO, x::AbstractIrrational)
     m === nothing ? (length(sprint(show, x, context=ctx, sizehint=0)), 0) :
     (length(m.captures[1]), length(m.captures[2]))
 end
+
+# inv
+inv(x::AbstractIrrational) = 1/x
diff --git a/test/numbers.jl b/test/numbers.jl
@@ -1038,6 +1038,10 @@ end
     end
 end
 
+@testset "Irrational Inverses, Issue #30882" begin
+    @test @inferred(inv(π)) ≈ 0.3183098861837907
+end
+
 @testset "Irrationals compared with Rationals and Floats" begin
     @test Float64(pi,RoundDown) < pi
     @test Float64(pi,RoundUp) > pi