Duplicate parameter name handling improvements

When a method with duplicate parameter names is wrapped such as:

  void fn_3parms(int p_a, int p_a, double p_c);

Previously all duplicate parameter names were changed in order to
provide unique parameter names:
  void fn_3parms(int arg0, int arg1, double p_c)
Now the parameter names changed are just the 2nd and subsequent duplicate
parameter names:
  void fn_3parms(int p_a, int arg1, double p_c)

2 files changed, 22 insertions, 0 deletions

diff --git a/Examples/test-suite/common.mk b/Examples/test-suite/common.mk
index db2a3d6f7..ff9b8538f 100644
--- a/Examples/test-suite/common.mk
+++ b/Examples/test-suite/common.mk
@@ -225,6 +225,7 @@ CPP_TEST_CASES += \
 	director_wombat \
 	disown \
 	duplicate_class_name_in_ns \
+	duplicate_parm_names \
 	dynamic_cast \
 	empty \
 	enum_ignore \
diff --git a/Examples/test-suite/duplicate_parm_names.i b/Examples/test-suite/duplicate_parm_names.i
new file mode 100644
index 000000000..b6c369c8c
--- /dev/null
+++ b/Examples/test-suite/duplicate_parm_names.i
@@ -0,0 +1,21 @@
+%module duplicate_parm_names
+
+// Testing duplicate argument name handling
+
+%{
+void fn_2parms(int, int) {}
+void fn_3parms(int, int, double) {}
+void fn_4parms(int, short, double, const char *) {}
+
+struct SameParmNameCheck {
+  void metho(int, short, double, const char *) {}
+};
+%}
+
+void fn_2parms(int argx, int argx) {}
+void fn_3parms(int p_a, int p_a, double p_c) {}
+void fn_4parms(int duplicate, short duplicate, double duplicate, const char *duplicate) {}
+
+struct SameParmNameCheck {
+  void metho(int dup, short dup, double uniq, const char *dup) {}
+};