[NF] Added complex flow test.

Belonging to [master]:
  - OpenModelica/OMCompiler#2322
  - OpenModelica/OpenModelica-testsuite#902

flattening/modelica/scodeinst/ConnectComplexFlow1.mo

@@ -0,0 +1,55 @@
+// name: ConnectComplexFlow1
+// keywords:
+// status: correct
+// cflags: -d=newInst
+//
+
+operator record Complex
+  replaceable Real re;
+  replaceable Real im;
+end Complex;
+
+package Modelica
+  package SIunits
+    type Current = Real;
+    type Voltage = Real;
+
+    operator record ComplexCurrent = Complex(
+      redeclare Modelica.SIunits.Current re,
+      redeclare Modelica.SIunits.Current im
+    );
+
+    operator record ComplexVoltage = Complex(
+      redeclare Modelica.SIunits.Voltage re,
+      redeclare Modelica.SIunits.Voltage im
+    );
+  end SIunits;
+end Modelica;
+
+package Internals  
+  operator record ComplexVoltage =
+    Modelica.SIunits.ComplexVoltage(re(nominal = 1e3), im(nominal = 1e3));
+  operator record ComplexCurrent =
+    Modelica.SIunits.ComplexCurrent(re(nominal = 1e3), im(nominal = 1e3));
+
+  connector Pin 
+    ComplexVoltage v;
+    flow ComplexCurrent i;
+  end Pin;
+end Internals;
+
+model ConnectComplexFlow1
+  Internals.Pin pin;
+end ConnectComplexFlow1;
+
+// Result:
+// class ConnectComplexFlow1
+//   Real pin.v.re(nominal = 1000.0);
+//   Real pin.v.im(nominal = 1000.0);
+//   Real pin.i.re(nominal = 1000.0);
+//   Real pin.i.im(nominal = 1000.0);
+// equation
+//   pin.i.re = 0.0;
+//   pin.i.im = 0.0;
+// end ConnectComplexFlow1;
+// endResult

flattening/modelica/scodeinst/Makefile

@@ -128,6 +128,7 @@ ConnectAlgorithm.mo \
 ConnectArrays1.mo \
 ConnectArrays2.mo \
 ConnectArrays3.mo \
+ConnectComplexFlow1.mo \
 ConnectDiffOrder1.mo \
 ConnectDiffOrder2.mo \
 ConnectInitial.mo \