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康桓瑋 has asked 86 questions and find answers to 61 problems.

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康桓瑋 questions

Why the standard defines borrowed_subrange_t as common_range?
The redundancy of forward_iterator concept?
Why is ranges::basic_istream_view::begin() not cached?
C++20 concepts require operator overloading combine with user-define template operator overloading function
How to define a concept of a object that is can be structured binding?
Assignment operator of std::variant of custom type with deleted special member functions?
what are the constraints for std::ranges::make_heap?
Why does `iota(0) | take(0)` not model ranges::sized_range in C++20?
Ambiguous name lookup with C++20 using-enum-declaration
The mystery of C++20 concept boolean-testable

康桓瑋 answers

C++ function parameter that only accepts iterator to a specific type
count std::optional types in variadic template tuple
How can I enable/disable a function depending on the size of an array?
Custom range adaptor only works at the end of composition
Why does std::views::split() compile but not split with an unnamed string literal as a pattern?
Only copiable type not accepted in msvc std::vector implementation
Why does std::println(std::vector) fail to compile?
fmt compile time format string check without generating asm code for the check?
Why cannot I generate pairs of numbers from a std::views::iota in c++ 20
Why the type of the iterator to `std::views::transform` does not seem to be a deterministic type?