Constants are useful when declaring the length of a static array, which is fixed at compile time. Listing 4.2 in Lesson 4, “Managing Arrays and Strings,” includes an example that demonstrates the use of a const int to define the length of an array. Constant Expressions Using constexpr The...
C/C++ : converting std::string to const char* I get the error : left of '.c_str' must have class/struct/union type is 'char *' C# to C++ dll - how to pass strings as In/Out parameters to unmanaged functions that expect a string (LPSTR) as a function parameter. C++ int to str...
So long as a compiler is capable of evaluating a constant expression to a constant, it can be used in statements and expressions at places where a constant is expected. In the preceding example, TwicePi() is a constexpr that uses a constant expression GetPi(). This will possibly trigger ...
JavaScript, Go: Added public property id Speech_SegmentationMaximumTimeMs determine the end of a spoken phrase based on time in Java, Python, C#, C++ Bug fixes Fixed embedded TTS voice (re)loaded for every synthesis if the voice name is not set. Fixed offset calculation problems when using ...
#include <iostream> #include <regex> #include <string> int main() { try { std::string pattern = "[invalid regex pattern"; std::regex re(pattern); } catch (const std::regex_error& e) { std::cerr << "Regex error: " << e.what() ...
std::unary_function has been removed in C++17 so what is an equivalent version? #include <functional> struct path_sep_comp: public std::unary_function<tchar, bool> { path_sep_comp () {} bool operator () (tchar ch) const { #if defined (_WIN32) return ch == LOG4CPLUS_TEXT ('...
struct String { String(uint32_t) { /* size of string */ } String(const char*) { /* string */ } }; String s1( NULL ); String s2( 5 ); In such cases, you need explicit cast (i.e., String s((char*)0)). Implementation of unsophisticated nullptr nullptr is a subtle example...
Additionally to the suggestions from TurtleShell, using compilation time comes to my mind. For example in C++, the compiler is able to evaluate "const" and "constexpr" expressions at compile time, meaning it isn't necessary at runtime anymore, effectively decreasing the runtime of your program...
Added <optional>, <variant>, shared_ptr::weak_type, and <cstdalign>. Enabled C++14 constexpr in min(initializer_list), max(initializer_list), and minmax(initializer_list), and min_element(), max_element(), and minmax_element().For more information, see Microsoft C/C++ language conforman...
You can see the difference in generated assembly at this Compiler Explorer link. CMake & Cross Platform Containers are a great way to package up everything for running an application. Through a Dockerfile, all prerequisites are captured so that there is a consistent runtime environment anywhere ...