Daniel Langr

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Daniel Langr has asked 71 questions and find answers to 177 problems.

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Daniel Langr questions

GCC does not generate machine code for out-of-class defaulted copy constructor
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

Daniel Langr answers

Open MP : Symmetric matrix multiplication for Sparse matrices
Why does a friend operator require const-ness on its operands while a member operator does not?
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