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 // <algorithm> 11 12 // template<class Iter, IntegralLike Size, Callable Generator> 13 // requires OutputIterator<Iter, Generator::result_type> 14 // && CopyConstructible<Generator> 15 // void 16 // generate_n(Iter first, Size n, Generator gen); 17 18 #ifdef _MSC_VER 19 #pragma warning(disable: 4244) // conversion from 'const double' to 'int', possible loss of data 20 #endif 21 22 #include <algorithm> 23 #include <cassert> 24 25 #include "test_macros.h" 26 #include "test_iterators.h" 27 #include "user_defined_integral.hpp" 28 29 struct gen_test 30 { 31 int operator()() const {return 2;} 32 }; 33 34 template <class Iter, class Size> 35 void 36 test2() 37 { 38 const unsigned n = 4; 39 int ia[n] = {0}; 40 assert(std::generate_n(Iter(ia), Size(n), gen_test()) == Iter(ia+n)); 41 assert(ia[0] == 2); 42 assert(ia[1] == 2); 43 assert(ia[2] == 2); 44 assert(ia[3] == 2); 45 } 46 47 template <class Iter> 48 void 49 test() 50 { 51 test2<Iter, int>(); 52 test2<Iter, unsigned int>(); 53 test2<Iter, long>(); 54 test2<Iter, unsigned long>(); 55 test2<Iter, UserDefinedIntegral<unsigned> >(); 56 test2<Iter, float>(); 57 test2<Iter, double>(); // this is PR#35498 58 test2<Iter, long double>(); 59 } 60 61 int main() 62 { 63 test<forward_iterator<int*> >(); 64 test<bidirectional_iterator<int*> >(); 65 test<random_access_iterator<int*> >(); 66 test<int*>(); 67 } 68