CPPAlliance

@CPPAlliance

Our mission is to make the C++ programming language accessible and useful to anyone who wishes to learn and apply the language.

CPPAlliance
@CPPAlliance
20h
std::string_view bits = "10101010"; std::bitset<8> b(bits); // error bitset accepts a std::string. It accepts a const char* Not a string_view. Through C++23, you copied it into a string or spelled out bits.data(), bits.size() 🧵👇
1
CPPAlliance
@CPPAlliance
Oct 30
constexpr int test() { auto p = std::make_shared<int>(42); std::weak_ptr<int> w = p; return *w.lock(); } static_assert(test() == 42); unique_ptr went constexpr in C++23 shared_ptr waited until C++26 🧵👇
1
CPPAlliance
@CPPAlliance
Oct 29
C++26 removed [[nodiscard]] from the entire standard library specification Not one function. All of them Good idea or bad idea? 🧵👇
10
CPPAlliance
@CPPAlliance
Oct 28
void greet(int count, const char* name); C++26 reflection can read that parameter list. The types, the order, and the names "count" and "name". At compile time Logging, RPC bindings, CLI parsers: stop typing every name twice 🧵👇
4
CPPAlliance
@CPPAlliance
Oct 27
std::print("{} {}\n", id, name); As C++23 specified it, this formats everything into a temporary std::string, then writes the string std::print was meant to be the fast way to print. The spec baked in an extra copy 🧵👇
1