From 056abd2059c65a3e908193aeae16fad98017437c Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Sun, 2 Dec 2012 13:20:44 +0000
Subject: Vendor import of clang release_32 branch r168974 (effectively, 3.2
 RC2): http://llvm.org/svn/llvm-project/cfe/branches/release_32@168974

---
 lib/Sema/SemaLambda.cpp | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

(limited to 'lib/Sema/SemaLambda.cpp')

diff --git a/lib/Sema/SemaLambda.cpp b/lib/Sema/SemaLambda.cpp
index 6414c6f..15cd2a7 100644
--- a/lib/Sema/SemaLambda.cpp
+++ b/lib/Sema/SemaLambda.cpp
@@ -22,13 +22,14 @@ using namespace clang;
 using namespace sema;
 
 CXXRecordDecl *Sema::createLambdaClosureType(SourceRange IntroducerRange,
+                                             TypeSourceInfo *Info,
                                              bool KnownDependent) {
   DeclContext *DC = CurContext;
   while (!(DC->isFunctionOrMethod() || DC->isRecord() || DC->isFileContext()))
     DC = DC->getParent();
   
   // Start constructing the lambda class.
-  CXXRecordDecl *Class = CXXRecordDecl::CreateLambda(Context, DC, 
+  CXXRecordDecl *Class = CXXRecordDecl::CreateLambda(Context, DC, Info,
                                                      IntroducerRange.getBegin(),
                                                      KnownDependent);
   DC->addDecl(Class);
@@ -369,15 +370,13 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
     if (!TmplScope->decl_empty())
       KnownDependent = true;
   
-  CXXRecordDecl *Class = createLambdaClosureType(Intro.Range, KnownDependent);
-  
   // Determine the signature of the call operator.
   TypeSourceInfo *MethodTyInfo;
   bool ExplicitParams = true;
   bool ExplicitResultType = true;
   bool ContainsUnexpandedParameterPack = false;
   SourceLocation EndLoc;
-  llvm::ArrayRef<ParmVarDecl *> Params;
+  llvm::SmallVector<ParmVarDecl *, 8> Params;
   if (ParamInfo.getNumTypeObjects() == 0) {
     // C++11 [expr.prim.lambda]p4:
     //   If a lambda-expression does not include a lambda-declarator, it is as 
@@ -410,17 +409,25 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
     ExplicitResultType
       = MethodTyInfo->getType()->getAs<FunctionType>()->getResultType() 
                                                         != Context.DependentTy;
-    
-    TypeLoc TL = MethodTyInfo->getTypeLoc();
-    FunctionProtoTypeLoc Proto = cast<FunctionProtoTypeLoc>(TL);
-    Params = llvm::ArrayRef<ParmVarDecl *>(Proto.getParmArray(), 
-                                           Proto.getNumArgs());
+
+    if (FTI.NumArgs == 1 && !FTI.isVariadic && FTI.ArgInfo[0].Ident == 0 &&
+        cast<ParmVarDecl>(FTI.ArgInfo[0].Param)->getType()->isVoidType()) {
+      // Empty arg list, don't push any params.
+      checkVoidParamDecl(cast<ParmVarDecl>(FTI.ArgInfo[0].Param));
+    } else {
+      Params.reserve(FTI.NumArgs);
+      for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i)
+        Params.push_back(cast<ParmVarDecl>(FTI.ArgInfo[i].Param));
+    }
 
     // Check for unexpanded parameter packs in the method type.
     if (MethodTyInfo->getType()->containsUnexpandedParameterPack())
       ContainsUnexpandedParameterPack = true;
   }
-  
+
+  CXXRecordDecl *Class = createLambdaClosureType(Intro.Range, MethodTyInfo,
+                                                 KnownDependent);
+
   CXXMethodDecl *Method = startLambdaDefinition(Class, Intro.Range,
                                                 MethodTyInfo, EndLoc, Params);
   
@@ -528,6 +535,10 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
       continue;
     }
 
+    // Ignore invalid decls; they'll just confuse the code later.
+    if (Var->isInvalidDecl())
+      continue;
+
     if (!Var->hasLocalStorage()) {
       Diag(C->Loc, diag::err_capture_non_automatic_variable) << C->Id;
       Diag(Var->getLocation(), diag::note_previous_decl) << C->Id;
-- 
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