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康桓瑋 has asked 92 questions and find answers to 96 problems.

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康桓瑋 questions

Combined with C++23 Deducing this and conversion operator with auto return type?
Why does ranges::for_each return the function?
Why can't the compiler use the std::string conversion function of the class when perform operator<<?
The problem of libstdc++‘s implementation of std::declval
How to project elements nestedly in c++20 constrained algorithms?
What is the rationale behind the iterator/sentinel of range adaptors providing the base() accessor?
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

康桓瑋 answers

Why doesn't std::ranges::find compile while std::find works fine?
Take value out of std::optional
How to use iota_view for custom IntLike types?
Is it possible to create a concept that is only a lambda?
ranges::sort does not compile
Why does std::views::take_while() do so many function invocations? (even with `cache_latest`)
Is there a more elegant way to convert a two-state string into a bitset than just by a 'for' loop?
How can I combine corresponding items from several vectors into a single vector of structs?
Issue with a custom range when using both std::views::join and std::views::enumerate
Are enum values allowed in a std::integer_sequence?