C++ 2017 ✮

std::map<int, std::string> src1,"a"; std::map<int, std::string> dst; dst.insert(src.extract(1));

sum(1, 2, 3, 4, 5); // returns 15

: Previously, nested namespaces required multiple blocks. C++17 allows a more concise syntax: namespace A::B::C ... . c++ 2017

Industry experts provided detailed "trip reports" from major 2017 gatherings, which serve as historical records of what the community found most interesting that year: // returns 15 : Previously

While compilers often optimized away copies of temporary objects (Return Value Optimization), C++17 makes this mandatory in specific cases (like returning a prvalue). This means copy constructors might not even need to be accessible for the code to compile. c++ 2017

Most STL algorithms gained execution policy overloads: seq , par , par_unseq .