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
17h
How do you sort types at compile time? std::variant<int, double> std::variant<double, int> Same types. Different variants. Until C++26 there was no portable, constexpr way to order two types 🧵👇
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CPPAlliance
@CPPAlliance
Nov 2
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() 🧵👇
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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 🧵👇
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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 🧵👇
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