From f965caa221ef6da0e2ab2263f11fd79c97f06842 Mon Sep 17 00:00:00 2001
From: triton <ripzonetriton@gmail.com>
Date: Wed, 30 Jan 2013 15:41:45 +0000
Subject: [PATCH] Added a pass to check for duplicated declaration names.

---
 .../Passes/DuplicatedNamesCheckerPass.cs      | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 src/Generator/Passes/DuplicatedNamesCheckerPass.cs

diff --git a/src/Generator/Passes/DuplicatedNamesCheckerPass.cs b/src/Generator/Passes/DuplicatedNamesCheckerPass.cs
new file mode 100644
index 00000000..0308d8eb
--- /dev/null
+++ b/src/Generator/Passes/DuplicatedNamesCheckerPass.cs
@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+
+namespace Cxxi.Passes
+{
+    public class DuplicatedNamesCheckerPass : TranslationUnitPass
+    {
+        private readonly IDictionary<string, Declaration> names;
+
+        public DuplicatedNamesCheckerPass()
+        {
+            names = new Dictionary<string, Declaration>();
+        }
+
+        public override bool ProcessClass(Class @class)
+        {
+            if (@class.Ignore) return false;
+
+            names.Clear();
+
+            foreach (var baseClass in @class.Bases)
+                ProcessClass(baseClass.Class);
+
+            CheckDuplicates(@class.Fields);
+            CheckDuplicates(@class.Methods);
+            CheckDuplicates(@class.Properties);
+
+            return true;
+        }
+
+        void CheckDuplicates(IEnumerable<Declaration> decls)
+        {
+            foreach (var decl in decls)
+            {
+                if (decl.Ignore) continue;
+                CheckDuplicate(decl);
+            }
+        }
+
+        void CheckDuplicate(Declaration decl)
+        {
+            Declaration duplicate;
+
+            // If the name is not yet on the map, then add it.
+            if (!names.TryGetValue(decl.Name, out duplicate))
+            {
+                names[decl.Name] = decl;
+                return;
+            }
+
+            // Else we found a duplicate name and need to change it.
+            Console.WriteLine("Found a duplicate named declaration: {0}",
+                decl.Name);
+        }
+    }
+
+    public static class CheckDuplicateNamesExtensions
+    {
+        public static void CheckDuplicateNames(this PassBuilder builder)
+        {
+            var pass = new DuplicatedNamesCheckerPass();
+            builder.AddPass(pass);
+        }
+    }
+}