17112dae6acac544a0271a85d95342c583441e2d1Dan Albert//===----------------------------------------------------------------------===// 27112dae6acac544a0271a85d95342c583441e2d1Dan Albert// 37112dae6acac544a0271a85d95342c583441e2d1Dan Albert// The LLVM Compiler Infrastructure 47112dae6acac544a0271a85d95342c583441e2d1Dan Albert// 57112dae6acac544a0271a85d95342c583441e2d1Dan Albert// This file is dual licensed under the MIT and the University of Illinois Open 67112dae6acac544a0271a85d95342c583441e2d1Dan Albert// Source Licenses. See LICENSE.TXT for details. 77112dae6acac544a0271a85d95342c583441e2d1Dan Albert// 87112dae6acac544a0271a85d95342c583441e2d1Dan Albert//===----------------------------------------------------------------------===// 97112dae6acac544a0271a85d95342c583441e2d1Dan Albert 107112dae6acac544a0271a85d95342c583441e2d1Dan Albert// <string_view> 117112dae6acac544a0271a85d95342c583441e2d1Dan Albert 127112dae6acac544a0271a85d95342c583441e2d1Dan Albert// constexpr const_iterator rend() const; 137112dae6acac544a0271a85d95342c583441e2d1Dan Albert 147112dae6acac544a0271a85d95342c583441e2d1Dan Albert#include <experimental/string_view> 157112dae6acac544a0271a85d95342c583441e2d1Dan Albert#include <cassert> 167112dae6acac544a0271a85d95342c583441e2d1Dan Albert 177112dae6acac544a0271a85d95342c583441e2d1Dan Alberttemplate <class S> 187112dae6acac544a0271a85d95342c583441e2d1Dan Albertvoid 197112dae6acac544a0271a85d95342c583441e2d1Dan Alberttest(S s) 207112dae6acac544a0271a85d95342c583441e2d1Dan Albert{ 217112dae6acac544a0271a85d95342c583441e2d1Dan Albert const S& cs = s; 227112dae6acac544a0271a85d95342c583441e2d1Dan Albert typename S::reverse_iterator e = s.rend(); 237112dae6acac544a0271a85d95342c583441e2d1Dan Albert typename S::const_reverse_iterator ce1 = cs.rend(); 247112dae6acac544a0271a85d95342c583441e2d1Dan Albert typename S::const_reverse_iterator ce2 = s.crend(); 257112dae6acac544a0271a85d95342c583441e2d1Dan Albert 267112dae6acac544a0271a85d95342c583441e2d1Dan Albert if (s.empty()) 277112dae6acac544a0271a85d95342c583441e2d1Dan Albert { 287112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert( e == s.rbegin()); 297112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert(ce1 == cs.rbegin()); 307112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert(ce2 == s.rbegin()); 317112dae6acac544a0271a85d95342c583441e2d1Dan Albert } 327112dae6acac544a0271a85d95342c583441e2d1Dan Albert else 337112dae6acac544a0271a85d95342c583441e2d1Dan Albert { 347112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert( e != s.rbegin()); 357112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert(ce1 != cs.rbegin()); 367112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert(ce2 != s.rbegin()); 377112dae6acac544a0271a85d95342c583441e2d1Dan Albert } 387112dae6acac544a0271a85d95342c583441e2d1Dan Albert 397112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert( e - s.rbegin() == s.size()); 407112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert(ce1 - cs.rbegin() == cs.size()); 417112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert(ce2 - s.crbegin() == s.size()); 427112dae6acac544a0271a85d95342c583441e2d1Dan Albert 437112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert( e == ce1); 447112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert( e == ce2); 457112dae6acac544a0271a85d95342c583441e2d1Dan Albert assert(ce1 == ce2); 467112dae6acac544a0271a85d95342c583441e2d1Dan Albert} 477112dae6acac544a0271a85d95342c583441e2d1Dan Albert 487112dae6acac544a0271a85d95342c583441e2d1Dan Albert 497112dae6acac544a0271a85d95342c583441e2d1Dan Albertint main() 507112dae6acac544a0271a85d95342c583441e2d1Dan Albert{ 517112dae6acac544a0271a85d95342c583441e2d1Dan Albert typedef std::experimental::string_view string_view; 527112dae6acac544a0271a85d95342c583441e2d1Dan Albert typedef std::experimental::u16string_view u16string_view; 537112dae6acac544a0271a85d95342c583441e2d1Dan Albert typedef std::experimental::u32string_view u32string_view; 547112dae6acac544a0271a85d95342c583441e2d1Dan Albert typedef std::experimental::wstring_view wstring_view; 557112dae6acac544a0271a85d95342c583441e2d1Dan Albert 567112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(string_view ()); 577112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(u16string_view()); 587112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(u32string_view()); 597112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(wstring_view ()); 607112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(string_view ( "123")); 617112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(wstring_view (L"123")); 627112dae6acac544a0271a85d95342c583441e2d1Dan Albert#if __cplusplus >= 201103L 637112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(u16string_view{u"123"}); 647112dae6acac544a0271a85d95342c583441e2d1Dan Albert test(u32string_view{U"123"}); 657112dae6acac544a0271a85d95342c583441e2d1Dan Albert#endif 667112dae6acac544a0271a85d95342c583441e2d1Dan Albert} 67