std::ios_base::seekdir(3)

💖 NAME 💖

std::ios_base::seekdir - std::ios_base::seekdir

Okay bestie, welcome to the std::ios_base::seekdir(3) page from the C++ Standard Libary manual — yes, that spelling is straight from the header, don't come for me 😭💅

This is the seek-direction type page, so if you've ever needed to tell a stream "bestie, go back to the start" or "wait, stay right there," this is your moment ✨

✨ Synopsis ✨

typedef /*implementation defined*/ seekdir;
static constexpr seekdir beg = /*implementation defined*/

static constexpr seekdir end = /*implementation defined*/

static constexpr seekdir cur = /*implementation defined*/

It specifies the file seeking direction type. The following constants are defined:

• beg — the beginning of a stream 🌱
• end — the ending of a stream 🏁
• cur — the current position of stream position indicator 📍

🍓 Example 🍓

// Run this code

#include <iostream>
#include <sstream>
#include <string>

int main()
{
    std::istringstream in("Hello, World!");
    std::string word1, word2, word3, word4, word5;

    in >> word1;
    in.seekg(0, std::ios_base::beg); // <- rewind
    in >> word2;
    in.seekg(1, std::ios_base::cur); // -> seek from cur pos toward the
       end
    in >> word3;
    in.seekg(-6, std::ios_base::cur); // <- seek from cur pos (end)
       toward begin
    in >> word4;
    in.seekg(-6, std::ios_base::end); // <- seek from end toward begin
    in >> word5;

    std::cout << "word1 = " << word1 << '\n'
              << "word2 = " << word2 << '\n'
              << "word3 = " << word3 << '\n'
              << "word4 = " << word4 << '\n'
              << "word5 = " << word5 << '\n';
}

🌈 Output: 🌈

word1 = Hello,
word2 = Hello,
word3 = World!
word4 = World!
word5 = World!

👀 See also 👀

• seekg — sets the input position indicator (public member function of std::basic_istream<CharT,Traits>) 💜
• seekp — sets the output position indicator (public member function of std::basic_ostream<CharT,Traits>) 💜
• pubseekoff — invokes seekoff() (public member function of std::basic_streambuf<CharT,Traits>) 💜

That's the whole page, bestie! Source: http://cppreference.com 🌸 Date/version: 2024.06.10 🎀 May your seeks always land exactly where you meant, no cap ✨💖