std::strings; myclass(std::initializer_list<int>args) { std::stringstream ss;for(auto it = args.begin(); it != args.end(); ++it) { ss<<''<< *it;//s = ss.str();} s=ss.str(); std::cout<<"myclass--counstruction"<<std::endl; }voiddisplay() { std::cout<< s <<std...
通过std::initializer_list<T>可以实现大括号初始化对象。也可以实现类似于动态类型的效果。 1 #include <iostream> 2 #include <initializer_list> 3 #include <vector> 4 5 using namespace std; 6 7 class Test { 8 vector<int> list; 9 public: 10 Test(std::initializer_list<int> args) { 11 li...
问谁能给我一个使用QVector::QVector(std::initializer_list<T> args)的例子？EN用一些实例来作为QCu...
typenameV=detail::vec_type_helper_t<T,Args...>>std::vector<V>make_vector(Args&&...args){s...
<initializer_list> void threadFunc(std::initializer_list<int> args) { for (auto arg : args) { std::cout << arg << " "; } std::cout << std::endl; } int main() { std::initializer_list<int> args = {1, 2, 3, 4, 5}; std::thread t(threadFunc, args); t.join(); ...
template<typenameT,typename...Args>autoinitHelper(Args&&...args){std::vector<T>vec;vec.reserve(sizeof...(Args));(vec.emplace_back(std::forward<Args>(args)),...);returnvec;} See at@Compiler Explorer When we run the code: std::cout<<"initHelper { }\n";autovec=initHelper<Object>...
Z:/compilers/msvc/14.41.33923-14.41.33923.0/include\xstring(2479): note: see reference to function template instantiation ‘std::_Compressed_pair<Mallocator<char>,std::_String_val<std::_Simple_types<_Elem>>,true>::_Compressed_pair<>(std::_Zero_then_variadic_args_t) noexcept(fals...
template<typenameT>voidprintValue(constT&val){std::cout<<val<<std::endl;}template<typenameT,typename...Args>voidprint(Args...args){autoarr={(printValue(args),0)...};//st::std::initializer_list<int>{(print(args),0)...}; // is ok} ...
// modifierstemplate<class...Args>constexprreferenceemplace_back(Args&&...args);constexprvoidpush_back(constT&x);constexprvoidpush_back(T&&x); 既然这么麻烦,为什么不在编译器开洞,认为{x, x, x} 就是std::initializer_list<T>呢? // 因为这玩意的确还经常不是initializer_liststructMyStruct{inta=...
这样可能需要看起来写法差不多的初始化器列表会导致产生initializer_list<T>和initializer_list<const T>...