HolyBlackCat

HolyBlackCat has asked 98 questions and find answers to 359 problems.

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HolyBlackCat questions

How do I use std::formatter directly?
How do I make a templated conversion operator to `std::optional<T>`?
In a false `if constexpr` branch outside of a template, are bodies of called template functions instantiated or not?
In C++26, are implementations required to "initialize" uninitialized variables to some fixed byte pattern?
In a lambda, what does the second list of attributes do?
Why set the stop flag using `memory_order_seq_cst`, if you check it with `memory_order_relaxed`?
How do I check at compile-time if there's enough `{}` placeholders for all arguments?
Why does the use of `std::aligned_storage` allegedly cause UB due to it failing to "provide storage"?
In a concept, how can I check that a member is static?
How do I use Clang's attribute `preferred_name`?

HolyBlackCat answers

How does a single variable store multiple values?
How to check if specific overload of an operator exists at compile time in C++?
Return a reference from lambda
how do I write a Container<T> trait and use its partial specialization as function params
What, actually, is the modulo of a negative number?
How can `if constexpr` be made SFINAE-friendly?
Why Eigen doesn't need template keywords for using template function call of Matrix?
Perfect forwarding and non-type template parameters
Why can there be const assignment operators
Can you output data in C++ without using any includes?