Check that a parameter name of a function definition does not shadow an enum definition.

src/test/java/FunctionDefinitionTest.java

@@ -77,4 +77,19 @@ public class FunctionDefinitionTest {
         var e = assertThrows(RuntimeException.class, () -> ctxAnal.visit(tree));
         assertEquals("Error in line 1:20 Function foo has to return something of type int.", e.getMessage());
     }
+
+    @Test
+    void shouldThrowExceptionIfParameterNameMatchesEnumName() {
+        // given
+        var tree = Helper.prepareParser("enum Bar { A, B } function foo(Bar: int): int { return 1; } foo(1);");
+        var ctxAnal = new ContextAnalysis(
+                Helper.getFuncs(tree),
+                Helper.getStructs(tree),
+                Helper.getEnums(tree)
+        );
+
+        // when / then
+        var e = assertThrows(RuntimeException.class, () -> ctxAnal.visit(tree));
+        assertEquals("Error in line 1:31 Parameter name Bar duplicates an enum of the same name.", e.getMessage());
+    }
 }