Daniel Langr

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Daniel Langr has asked 67 questions and find answers to 168 problems.

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Daniel Langr questions

Why destructor needs to be accessible even when it is not called?
Why std::allocator<T>::allocate calls ::operator new?
Why is std::array<T,0> sized and aligned according to T in libc++?
Can a file stream destructor throw an exception in C++?
When to provide custom swap function in C++?
Private operator delete triggers compile-time error with GCC and Clang but not with MSVC
Seemingly missing optimization for calling const-vector size() in loop condition
Computation is optimized only if variable updated in loop is local
What exactly is invalidation of reference/pointer?
Why is std::launder a constexpr function?

Daniel Langr answers

Multithreading concept questions
Anonymous constructor and destructor call in vector
c++ aggregate has incomplete type and cannot be defined with template class
Storing an std::assume_aligned pointer C++ 20
Why does cannonical implementation of overloading binary arithmatic operator in C++ pass first arguement by value?
Is it undefined behaviour to read a different member than was written in a Union?
In C++ can we dereference this pointer? If so then how and if not then why?
C++ template: cannot match the last template in variadic class template
Empty angle-brackets after a function's name in explicit specialization
Local Variables in a for loop openmp