From 056c78020be0ae20bbb368cd141c1403223ba8b7 Mon Sep 17 00:00:00 2001
From: flaviut <tamasflaviu@gmail.com>
Date: Mon, 26 May 2014 10:39:37 -0400
Subject: [PATCH 1/2] Fix #1226

---
 compiler/ccgtypes.nim | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/compiler/ccgtypes.nim b/compiler/ccgtypes.nim
index 7c11d3e9af..79bf11bd2f 100644
--- a/compiler/ccgtypes.nim
+++ b/compiler/ccgtypes.nim
@@ -13,8 +13,7 @@
 
 proc mangleField(name: string): string =
   result = mangle(name)
-  if name[0] in 'a'..'z':
-    result[0] = name[0].toUpper
+  result[0] = result[0].toUpper
 
 proc isKeyword(w: PIdent): bool =
   # nimrod and C++ share some keywords

From 85e6e2a240bf7c9766dce86ec44368997adb58f1 Mon Sep 17 00:00:00 2001
From: flaviut <tamasflaviu@gmail.com>
Date: Mon, 26 May 2014 10:44:14 -0400
Subject: [PATCH 2/2] Document mangling

---
 compiler/ccgtypes.nim | 3 ++-
 compiler/ccgutils.nim | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/compiler/ccgtypes.nim b/compiler/ccgtypes.nim
index 79bf11bd2f..7a490082f0 100644
--- a/compiler/ccgtypes.nim
+++ b/compiler/ccgtypes.nim
@@ -13,7 +13,8 @@
 
 proc mangleField(name: string): string =
   result = mangle(name)
-  result[0] = result[0].toUpper
+  result[0] = result[0].toUpper # Mangling makes everything lowercase,
+                                # but some identifiers are C keywords
 
 proc isKeyword(w: PIdent): bool =
   # nimrod and C++ share some keywords
diff --git a/compiler/ccgutils.nim b/compiler/ccgutils.nim
index 9beb08a219..04983d6a4f 100644
--- a/compiler/ccgutils.nim
+++ b/compiler/ccgutils.nim
@@ -162,6 +162,9 @@ proc makeSingleLineCString*(s: string): string =
   result.add('\"')
 
 proc mangle*(name: string): string =
+  ## Lowercases the given name and manges any non-alphanumeric characters
+  ## so they are represented as `HEX____`. If the name starts with a number,
+  ## `N` is prepended
   result = ""
   case name[0]
   of Letters: