Test isequal(Num, ForwardDiff.Dual) ambiguity

JuliaSymbolics · Aug 29, 2024 · 3664e20 · 3664e20
1 parent e0bde4a
commit 3664e20
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/test/forwarddiff_symbolic_dual_ops.jl b/test/forwarddiff_symbolic_dual_ops.jl
@@ -107,3 +107,10 @@ for f ∈ (hypot, muladd)
 end
 
 # fma is not defined for Symbolics.Num
+
+# https://github.com/JuliaSymbolics/Symbolics.jl/issues/1246
+@testset "isequal type ambiguity" begin
+    @variables x
+    xfunc(xval) = isequal(x, xval) ? xval : xval
+    @test ForwardDiff.derivative(xfunc, 0.0) == 1.0
+end