Implement hash for AnalysisPoint

Author: YingboMa

docs/src/tutorials/custom_component.md

@@ -43,10 +43,10 @@ function NonlinearResistor(; name, Ga, Gb, Ve)
     pars = @parameters Ga=Ga Gb=Gb Ve=Ve
     eqs = [
         i ~ ifelse(v < -Ve,
-            Gb * (v + Ve) - Ga * Ve,
-            ifelse(v > Ve,
-                Gb * (v - Ve) + Ga * Ve,
-                Ga * v))
+        Gb * (v + Ve) - Ga * Ve,
+        ifelse(v > Ve,
+            Gb * (v - Ve) + Ga * Ve,
+            Ga * v))
     ]
     extend(ODESystem(eqs, t, [], pars; name = name), oneport)
 end

src/Blocks/analysis_points.jl

@@ -10,6 +10,12 @@ if Base.isdefined(ModelingToolkit, :isconnection)
 end
 
 Base.nameof(ap::AnalysisPoint) = ap.name
+function Base.hash(ap::AnalysisPoint, seed::UInt)
+    h1 = hash(ap.in, seed)
+    h2 = hash(ap.out, h1)
+    h3 = hash(ap.name, h2)
+    h3 ⊻ (0xd29cdc51aa6562d4 % UInt)
+end
 
 function ap_var(sys)
     if hasproperty(sys, :u)