In general, the containers and collections of the std namespace are more efficient than the containers and collections of the Platform namespace. When to use each of these depends on how often collection content
1: #include<iostream> 2: 3: int main() 4: { 5: using namespace std; 6: 7: const double pi = 22.0 / 7; 8: cout << "The value of constant pi is: " << pi << endl; 9: 10: // Uncomment next line to fail compilation 11: // pi = 345; // error, assignment to a con...
#pragmaonce#include<memory>usingnamespaceSystem;namespaceClassLibrary1 {template<typenameT>publicrefclassBaseClassT{internal: std::shared_ptr<T> *m_spObject;public: property std::shared_ptr<T> NativeObject {std::shared_ptr<T>get(){return*m_spObject; } } };structTNativeType{};pub...
» a compilation error occurs if the same name is declared elsewhere in the same scope; » if the same name is declared in an enclosing scope, the the name in the namespace hides it. Theusing directive, ieusingnamespacestd;, does not add a name to the current scope, it only makes...
namespace mylib { template <typename T, T N> struct some_constant {}; template <int N> using mp_size_t = some_constant<int, N>; } Contents of /mylib/modules/mylib.cppm module; #include "mylib.hpp" export module mylib; export namespace mylib { using mylib::mp_siz...
The correct syntax is: Array<String<10> > short_string_array(100); 6.7.6 Referencing Static Variables and Static Functions Within a template definition, the compiler does not support referencing an object or function that is declared static at global scope or in a namespace. If multiple instan...
This function compiles without an error but always returns a blank string when I try to get the main window's caption:std::wstring gettext(HWND hwnd) { std::wstring stxt; GetWindowText(hwnd,(LPTSTR) stxt.c_str(),32768); return stxt; }...
V3019. It is possible that an incorrect variable is compared with null after type conversion using 'as' keyword. The analyzer has detected a potential error that may lead to memory access by a null reference. The situation that the analyzer detected deals with the following algorithm. An objec...
Error in <TClass::LoadClassInfo>: no interpreter information for class ROOT::Experimental::REve3DProjection is available even though it has a TClass initialization routine. In file included from libROOTEve dictionary payload:16: In file included from /github/home/ROOT-CI/build/include/ROOT/REve...
#include<string>#include<string_view>intmain(){usingnamespacestd::literals;// easiest way to access the s and sv suffixesautos1{"goo"s};// "goo"s is a std::string literal, so s1 will be deduced as a std::stringautos2{"moo"sv};// "moo"sv is a std::string_view literal, so...