Implement test for function ordering for dispatch. Catch bug for "const" characterization of function parameters. Add test for type characterizations.

unittests/function_ordering_test.cpp

@@ -0,0 +1,38 @@
+// Tests to make sure that the order in which function dispatches occur is correct
+
+#include <chaiscript/utility/utility.hpp>
+
+int test_one(const int &)
+{
+  return 1;
+}
+
+int test_two(int &)
+{
+  return 2;
+}
+
+int main()
+{
+  chaiscript::ChaiScript chai;
+  chai.eval("def test_fun(x) { return 3; }");
+  chai.eval("def test_fun(x) : x == \"hi\" { return 4; }");
+  chai.eval("def test_fun(x) { return 5; }");
+  chai.add(chaiscript::fun(&test_one), "test_fun");
+  chai.add(chaiscript::fun(&test_two), "test_fun");
+
+  int res1 = chai.eval<int>("test_fun(1)");
+  int res2 = chai.eval<int>("var i = 1; test_fun(i)");
+  int res3 = chai.eval<int>("test_fun(\"bob\")");
+  int res4 = chai.eval<int>("test_fun(\"hi\")");
+
+  if (res1 == 1
+      && res2 == 2 
+      && res3 == 3
+      && res4 == 4 )
+  {
+    return EXIT_SUCCESS;
+  } else {
+    return EXIT_FAILURE;
+  }
+}