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 19 int main() 20 { 21 using namespace std::literals; 22 23 std::string_view foo = ""sv; 24 assert(foo.length() == 0); 25 } 26
