std::basic_..._view::npos(3)

okay so bestie, welcome to the C++ Standard Libary manual page for std::basic_string_view::npos — yes, the name is literally the name, and we’re obsessed with the self-referential icon energy 💅✨

🌸 NAME 🌸

std::basic_string_view::npos — std::basic_string_view::npos

✨ Synopsis ✨

static constexpr size_type npos = size_type(-1);  (since C++17)

This is a special value equal to the maximum value representable by the type size_type. The exact meaning depends on context, but it is generally used either as end of view indicator by the functions that expect a view index or as the error indicator by the functions that return a view index. It’s been in the game since C++17, and it’s lowkey giving max-value main character energy, fr fr 🫶🔥

🎀 Example 🎀

Run this code, bestie — it’s a whole vibe check for npos:

// Run this code

#include <string_view>

constexpr bool
contains(std::string_view const what, std::string_view const where)
noexcept
{
    return std::string_view::npos != where.find(what);
}

int main()
{
    using namespace std::literals;

    static_assert(contains("water", "in a bottle of water"));
    static_assert(!contains("wine", "in a bottle of champagne"));
    static_assert(""sv.npos == "haystack"sv.find("needle"));
}

🦋 See also 🦋

• npos — special value. The exact meaning depends on the context.
• [static] — public static member constant of std::basic_string<CharT,Traits,Allocator>.

kiss kiss, this page came from http://cppreference.com and it’s dated 2024.06.10 💖