1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // Make sure the rvalue overload of operator>> isn't part of the overload set
10 // when the type is not input streamable from a lvalue stream.
11 
12 #include <istream>
13 #include <utility>
14 
15 struct Foo { };
16 
17 using X = decltype(std::declval<std::istream>() >> std::declval<Foo&>()); // expected-error {{invalid operands to binary expression}}
18 using Y = decltype(std::declval<std::istream>() >> std::declval<Foo>()); // expected-error {{invalid operands to binary expression}}
19