C++ 2017 -
std::any a = 42; int value = std::any_cast<int>(a); Non-owning reference to a string-like sequence. Ideal for function parameters.
std::map<int, std::string> src1,"a"; std::map<int, std::string> dst; dst.insert(src.extract(1)); Distinct enum class for raw memory representation (no arithmetic). c++ 2017
Type-safe union.
Here’s a detailed technical text covering (officially ISO/IEC 14882:2017), often referred to as C++2017. C++17: A Comprehensive Overview 1. Introduction C++17 is the fifth major revision of the C++ programming language standard, formally published by ISO in December 2017. It succeeded C++14 and preceded C++20. While not as groundbreaking as C++11, C++17 delivered a substantial set of practical features aimed at improving productivity, code clarity, performance, and library usability. It removed several outdated features and continued the evolution toward a safer, more expressive language. std::any a = 42; int value = std::any_cast<int>(a);
template<typename... Args> auto sum(Args... args) return (args + ...); // right fold Type-safe union
g++ -std=c++17 program.cpp clang++ -std=c++17 program.cpp cl /std:c++17 program.cpp # MSVC C++17 is often described as a "quality-of-life" release because it addressed many everyday pain points without introducing radical new paradigms (unlike C++11 or C++20). It made C++ more approachable and efficient, and most codebases quickly adopted its features.
print("temporary"); // no allocation Most STL algorithms gained execution policy overloads: seq , par , par_unseq .
