Daniel Langr

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Daniel Langr has asked 70 questions and find answers to 175 problems.

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Daniel Langr questions

GCC generates test for nonzeroness even if the zero value is guaranteed
std::construct_at vs placement new; additional move/copy constructor call
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

Daniel Langr answers

Can b&&0 be optimized
why inserting into set with same amount has different runtimes based on different approaches?
Threads, how to seed random number generator independently?
Get type contained in variant at run time in C++?
Seemingly compiler-specific failure to convert 64 bit bitset to binary string representation
Thread-specific variables when using parallel algorithms
Why automatic type inference from the initialization list doesn't work in the constructor?
Multithreading concept questions
Anonymous constructor and destructor call in vector
c++ aggregate has incomplete type and cannot be defined with template class