From dbb71db4cc79d6b74c0683ffec5f3a847179603c Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Mon, 23 Aug 2010 23:51:41 +0000
Subject: When calling a function or messaging a method marked "sentinel", add
 the ", nil", ", NULL", or ", (void*)0" to the end of the code completion,
 since it always has to be there anyway.

llvm-svn: 111867
---
 clang/lib/Sema/SemaCodeComplete.cpp | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'clang/lib/Sema/SemaCodeComplete.cpp')

diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
index d886e64bb53..aec55682180 100644
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -1666,6 +1666,20 @@ static void AddResultTypeChunk(ASTContext &Context,
   Result->AddResultTypeChunk(TypeStr);
 }
 
+static void MaybeAddSentinel(ASTContext &Context, NamedDecl *FunctionOrMethod,
+                             CodeCompletionString *Result) {
+  if (SentinelAttr *Sentinel = FunctionOrMethod->getAttr<SentinelAttr>())
+    if (Sentinel->getSentinel() == 0) {
+      if (Context.getLangOptions().ObjC1 &&
+          Context.Idents.get("nil").hasMacroDefinition())
+        Result->AddTextChunk(", nil");
+      else if (Context.Idents.get("NULL").hasMacroDefinition())
+        Result->AddTextChunk(", NULL");
+      else
+        Result->AddTextChunk(", (void*)0");
+    }
+}
+
 /// \brief Add function parameter chunks to the given code completion string.
 static void AddFunctionParameterChunks(ASTContext &Context,
                                        FunctionDecl *Function,
@@ -1702,8 +1716,11 @@ static void AddFunctionParameterChunks(ASTContext &Context,
   
   if (const FunctionProtoType *Proto 
         = Function->getType()->getAs<FunctionProtoType>())
-    if (Proto->isVariadic())
+    if (Proto->isVariadic()) {
       CCStr->AddPlaceholderChunk(", ...");
+
+      MaybeAddSentinel(Context, Function, CCStr);
+    }
 }
 
 /// \brief Add template parameter chunks to the given code completion string.
@@ -2020,6 +2037,8 @@ CodeCompleteConsumer::Result::CreateCodeCompletionString(Sema &S,
         Result->AddInformativeChunk(", ...");
       else
         Result->AddPlaceholderChunk(", ...");
+      
+      MaybeAddSentinel(S.Context, Method, Result);
     }
     
     return Result;
-- 
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