From cb4e68c34032d5de2983e3ae6bebfbb25875dd23 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 16 Oct 2009 02:34:51 +0000
Subject: increase helpfulness of assert message.

llvm-svn: 84240
---
 clang/lib/Basic/Diagnostic.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'clang/lib/Basic')

diff --git a/clang/lib/Basic/Diagnostic.cpp b/clang/lib/Basic/Diagnostic.cpp
index 4a29997a2cc..7ae7c76bb5c 100644
--- a/clang/lib/Basic/Diagnostic.cpp
+++ b/clang/lib/Basic/Diagnostic.cpp
@@ -82,9 +82,14 @@ static const StaticDiagInfoRec *GetDiagInfo(unsigned DiagID) {
 #ifndef NDEBUG
   static bool IsFirst = true;
   if (IsFirst) {
-    for (unsigned i = 1; i != NumDiagEntries; ++i)
+    for (unsigned i = 1; i != NumDiagEntries; ++i) {
+      assert(StaticDiagInfo[i-1].DiagID != StaticDiagInfo[i].DiagID &&
+             "Diag ID conflict, the enums at the start of clang::diag (in "
+             "Diagnostic.h) probably need to be increased");
+
       assert(StaticDiagInfo[i-1] < StaticDiagInfo[i] &&
              "Improperly sorted diag info");
+    }
     IsFirst = false;
   }
 #endif
-- 
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