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use crate::prelude::*;
pub fn read_line() -> String {
stdin().read_line()
}
pub fn print(s: &str) {
stdout().write(s)
}
pub fn eprint(s: &str) {
stderr().write(s)
}
pub fn stdout() -> Stdout {
Stdout(std::io::stdout())
}
pub fn stderr() -> Stderr {
Stderr(std::io::stderr())
}
pub fn stdin() -> Stdin {
Stdin(std::io::stdin())
}
#[derive(Debug)]
pub struct Stdout(std::io::Stdout);
#[derive(Debug)]
pub struct Stderr(std::io::Stderr);
#[derive(Debug)]
pub struct Stdin(std::io::Stdin);
impl Write for Stdout {
fn write(&mut self, s: &str) {
use std::io::Write;
self.0
.write_all(s.as_bytes())
.expect("Failed to write to stdout");
}
}
impl std::io::Write for Stdout {
fn write(&mut self, b: &[u8]) -> Result<usize, std::io::Error> {
self.0.write(b)
}
fn flush(&mut self) -> Result<(), std::io::Error> {
self.0.flush()
}
}
impl Write for Stderr {
fn write(&mut self, s: &str) {
use std::io::Write;
self.0
.write_all(s.as_bytes())
.expect("Failed to write to stdout");
}
}
impl std::io::Write for Stderr {
fn write(&mut self, b: &[u8]) -> Result<usize, std::io::Error> {
self.0.write(b)
}
fn flush(&mut self) -> Result<(), std::io::Error> {
self.0.flush()
}
}
impl Read for Stdin {
fn read_all(&mut self) -> String {
use std::io::Read;
let mut buf = String::new();
self.0
.read_to_string(&mut buf)
.expect("Failed to read from stdin");
buf
}
fn read_line(&mut self) -> String {
let mut buf = String::new();
self.0
.read_line(&mut buf)
.expect("Failed to read from stdin");
if !buf.is_empty() {
buf.truncate(buf.len() - 1);
}
buf
}
}
impl std::io::Read for Stdin {
fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
self.0.read(buf)
}
}
read_into_iter!(Stdin);
#[cfg(test)]
mod tests {
use crate::prelude::*;
#[test]
fn stdout_write() {
stdout().write("Hello!\n");
}
#[test]
fn stderr_write() {
stderr().write("Hello!\n");
}
#[test]
fn stdout_writeln() {
use std::io::Write;
let mut out = stdout();
writeln!(out, "World!").unwrap();
}
}