Deduplicator

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Deduplicator has asked 4 questions and find answers to 265 problems.

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Deduplicator questions

Can the compiler optimize out the empty base if the class contains a member of base class type as first element, followed by other members?
Why may there be a difference between union* and struct*?
Are end+1 iterators for std::string allowed?

Deduplicator answers

Why does the C++ standard not change std::set to use std::less<> as its default template argument?
How to find out if we are using really 48, 56 or 64 bits pointers
lua attempt to call method 'len' (a nil value)
How can I get the sign-bit of a double?
Why call basic_string::substr with no arguments?
Does there exist a ranges::views::group_by counterpart that takes into account all elements, as opposed to just contiguous ones?
When i use cout.tie(NULL), program doesn't print anything for my code, but if i print endl, program works fine
Is perror thread-safe?
Is there a modifiable-view version of ranges::view::transform?
Get pointer to overloaded function that would be called