Some small NFInst improvements.

- Fix type casting of unary expressions.
- Fix definition of spatialDistribution.

Author: perost

Compiler/FrontEnd/ModelicaBuiltin.mo

@@ -749,12 +749,13 @@ end getInstanceName;
 
 function spatialDistribution "Not yet implemented"
   input Real in0;
-  input Real x;
-  input Real initialPoints[:];
-  input Real initialValues[size(initialPoints)];
   input Real in1;
+  input Real x;
   input Boolean positiveVelocity;
-  output Real val;
+  parameter input Real initialPoints[:](each min = 0, each max = 1) = {0.0, 1.0};
+  parameter input Real initialValues[size(initialPoints)] = {0.0, 0.0};
+  output Real out0;
+  output Real out1;
 external "builtin";
 annotation(version="Modelica 3.3");
 end spatialDistribution;

Compiler/NFFrontEnd/NFExpression.mo

@@ -436,9 +436,12 @@ public
         then
           ARRAY(t, el);
 
-      case (_, Type.REAL())
+      case (UNARY(), _)
+        then UNARY(exp.operator, typeCastElements(exp.exp, ty));
+
+      else
         then
-          CAST(Type.REAL(), exp);
+          CAST(ty, exp);
 
     end match;
   end typeCastElements;