1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // The LLVM Compiler Infrastructure
5 //
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
8 //
9 //===----------------------------------------------------------------------===//
10
11 // UNSUPPORTED: c++98, c++03, c++11
12 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8, clang-3.9
13 // UNSUPPORTED: apple-clang-6, apple-clang-7, apple-clang-8
14 // Note: libc++ supports string_view before C++17, but literals were introduced in C++14
15
16 #include <string_view>
17 #include <cassert>
18
main()19 int main()
20 {
21 using namespace std;
22
23 string_view foo = ""sv;
24 assert(foo.length() == 0);
25 }
26