1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <forward_list> 11 12 // iterator before_begin(); 13 // const_iterator before_begin() const; 14 // const_iterator cbefore_begin() const; 15 16 #include <forward_list> 17 #include <cassert> 18 #include <iterator> 19 20 int main() 21 { 22 { 23 typedef int T; 24 typedef std::forward_list<T> C; 25 C c; 26 C::iterator i = c.before_begin(); 27 assert(std::distance(i, c.end()) == 1); 28 } 29 { 30 typedef int T; 31 typedef std::forward_list<T> C; 32 const C c; 33 C::const_iterator i = c.before_begin(); 34 assert(std::distance(i, c.end()) == 1); 35 } 36 { 37 typedef int T; 38 typedef std::forward_list<T> C; 39 const C c; 40 C::const_iterator i = c.cbefore_begin(); 41 assert(std::distance(i, c.end()) == 1); 42 assert(c.cbefore_begin() == c.before_begin()); 43 } 44 { 45 typedef int T; 46 typedef std::forward_list<T> C; 47 const T t[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; 48 C c(std::begin(t), std::end(t)); 49 C::iterator i = c.before_begin(); 50 assert(std::distance(i, c.end()) == 11); 51 assert(std::next(c.before_begin()) == c.begin()); 52 } 53 { 54 typedef int T; 55 typedef std::forward_list<T> C; 56 const T t[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; 57 const C c(std::begin(t), std::end(t)); 58 C::const_iterator i = c.before_begin(); 59 assert(std::distance(i, c.end()) == 11); 60 } 61 } 62
