Check the return type of operator[]() and fix a thinko that lead to a crash in SemaCX...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84041 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 56dd67023330eb607645bd9eda693b8ceba9574a..d8e49c7d694109ba13f3c394091c195c94817cf3 100644 (file)
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -1590,6 +1590,8 @@ Sema::ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc,
         if (CheckCallReturnType(FnDecl->getResultType(), OpLoc, TheCall.get(), 
                                 FnDecl))
           return ExprError();
+        return Owned(TheCall.release());
+
       } else {
         // We matched a built-in operator. Convert the arguments, then
         // break out so that we will build the appropriate built-in
@@ -1700,9 +1702,7 @@ Sema::ActOnArraySubscriptExpr(Scope *S, ExprArg Base, SourceLocation LLoc,
         }
 
         // Determine the result type
-        QualType ResultTy
-          = FnDecl->getType()->getAs<FunctionType>()->getResultType();
-        ResultTy = ResultTy.getNonReferenceType();
+        QualType ResultTy = FnDecl->getResultType().getNonReferenceType();
 
         // Build the actual expression node.
         Expr *FnExpr = new (Context) DeclRefExpr(FnDecl, FnDecl->getType(),
@@ -1713,9 +1713,16 @@ Sema::ActOnArraySubscriptExpr(Scope *S, ExprArg Base, SourceLocation LLoc,
         Idx.release();
         Args[0] = LHSExp;
         Args[1] = RHSExp;
-        return Owned(new (Context) CXXOperatorCallExpr(Context, OO_Subscript,
-                                                       FnExpr, Args, 2,
-                                                       ResultTy, LLoc));
+        
+        ExprOwningPtr<CXXOperatorCallExpr> 
+          TheCall(this, new (Context) CXXOperatorCallExpr(Context, OO_Subscript, 
+                                                          FnExpr, Args, 2, 
+                                                          ResultTy, RLoc));
+        if (CheckCallReturnType(FnDecl->getResultType(), LLoc, TheCall.get(), 
+                                FnDecl))
+          return ExprError();
+
+        return Owned(TheCall.release());
       } else {
         // We matched a built-in operator. Convert the arguments, then
         // break out so that we will build the appropriate built-in

diff --git a/test/SemaCXX/incomplete-call.cpp b/test/SemaCXX/incomplete-call.cpp
index cdb81f393415cd38f5938a712ec97c4a84dac7ea..4decd864832af8cd99e098930dd5e30777145151 100644 (file)
--- a/test/SemaCXX/incomplete-call.cpp
+++ b/test/SemaCXX/incomplete-call.cpp
@@ -1,5 +1,5 @@
 // RUN: clang-cc -fsyntax-only -verify %s
-struct A; // expected-note 10 {{forward declaration of 'struct A'}}
+struct A; // expected-note 11 {{forward declaration of 'struct A'}}
 
 A f(); // expected-note {{note: 'f' declared here}}
 
@@ -9,6 +9,7 @@ struct B {
   operator A(); // expected-note {{'operator A' declared here}}
   A operator!(); // expected-note 2 {{'operator!' declared here}}
   A operator++(int); // expected-note {{'operator++' declared here}}
+  A operator[](int); // expected-note {{'operator[]' declared here}}
 };
 
 void g() {
@@ -29,4 +30,5 @@ void g() {
   !b; // expected-error {{calling 'operator!' with incomplete return type 'struct A'}}
   b(); // expected-error {{calling 'operator()' with incomplete return type 'struct A'}}
   b++; // expected-error {{calling 'operator++' with incomplete return type 'struct A'}}
+  b[0]; // expected-error {{calling 'operator[]' with incomplete return type 'struct A'}}
 }