When performing copy initialization (= "implicit conversion", here) to

a class type from itself or a derived class thereof, enumerate
constructors and permit user-defined conversions to the arguments of
those constructors. This fixes the wacky implicit conversion sequence
used in std::auto_ptr's lame emulation of move semantics.

llvm-svn: 88670

1 files changed, 29 insertions, 1 deletions

diff --git a/clang/test/SemaCXX/conversion-function.cpp b/clang/test/SemaCXX/conversion-function.cpp
index 6182678e311..c0c318ed336 100644
--- a/clang/test/SemaCXX/conversion-function.cpp
+++ b/clang/test/SemaCXX/conversion-function.cpp
@@ -1,4 +1,4 @@
-// RUN: clang-cc -fsyntax-only -verify %s 
+// RUN: clang-cc -fsyntax-only -verify %s
 class X { 
 public:
   operator bool();
@@ -93,3 +93,31 @@ void f(Yb& a) {
   char ch = a;  // OK. calls Yb::operator char();
 }
 
+// Test conversion + copy construction.
+class AutoPtrRef { };
+
+class AutoPtr {
+  // FIXME: Using 'unavailable' since we do not have access control yet.
+  // FIXME: The error message isn't so good.
+  AutoPtr(AutoPtr &) __attribute__((unavailable));
+  
+public:
+  AutoPtr();
+  AutoPtr(AutoPtrRef);
+  
+  operator AutoPtrRef();
+};
+
+AutoPtr make_auto_ptr();
+
+AutoPtr test_auto_ptr(bool Cond) {
+  AutoPtr p1( make_auto_ptr() );
+  
+  AutoPtr p;
+  if (Cond)
+    return p; // expected-error{{incompatible type returning}}
+  
+  return AutoPtr();
+}
+
+