mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-13 09:05:00 +00:00
103 lines
2.5 KiB
Rust
103 lines
2.5 KiB
Rust
#![warn(clippy::read_zero_byte_vec)]
|
|
#![allow(
|
|
clippy::unused_io_amount,
|
|
clippy::needless_pass_by_ref_mut,
|
|
clippy::slow_vector_initialization
|
|
)]
|
|
use std::fs::File;
|
|
use std::io;
|
|
use std::io::prelude::*;
|
|
//@no-rustfix
|
|
extern crate futures;
|
|
use futures::io::{AsyncRead, AsyncReadExt};
|
|
use tokio::io::{AsyncRead as TokioAsyncRead, AsyncReadExt as _, AsyncWrite as TokioAsyncWrite, AsyncWriteExt as _};
|
|
|
|
fn test() -> io::Result<()> {
|
|
let cap = 1000;
|
|
let mut f = File::open("foo.txt").unwrap();
|
|
|
|
// should lint
|
|
let mut data = Vec::with_capacity(20);
|
|
f.read_exact(&mut data).unwrap();
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
//~| NOTE: `-D clippy::read-zero-byte-vec` implied by `-D warnings`
|
|
|
|
// should lint
|
|
let mut data2 = Vec::with_capacity(cap);
|
|
f.read_exact(&mut data2)?;
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
|
|
// should lint
|
|
let mut data3 = Vec::new();
|
|
f.read_exact(&mut data3)?;
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
|
|
// should lint
|
|
let mut data4 = vec![];
|
|
let _ = f.read(&mut data4)?;
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
|
|
// should lint
|
|
let _ = {
|
|
let mut data5 = Vec::new();
|
|
f.read(&mut data5)
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
};
|
|
|
|
// should lint
|
|
let _ = {
|
|
let mut data6: Vec<u8> = Default::default();
|
|
f.read(&mut data6)
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
};
|
|
|
|
// should not lint
|
|
let mut buf = [0u8; 100];
|
|
f.read(&mut buf)?;
|
|
|
|
// should not lint
|
|
let mut empty = vec![];
|
|
let mut data7 = vec![];
|
|
f.read(&mut empty);
|
|
|
|
// should not lint
|
|
f.read(&mut data7);
|
|
|
|
// should not lint
|
|
let mut data8 = Vec::new();
|
|
data8.resize(100, 0);
|
|
f.read_exact(&mut data8)?;
|
|
|
|
// should not lint
|
|
let mut data9 = vec![1, 2, 3];
|
|
f.read_exact(&mut data9)?;
|
|
|
|
Ok(())
|
|
}
|
|
|
|
async fn test_futures<R: AsyncRead + Unpin>(r: &mut R) {
|
|
// should lint
|
|
let mut data = Vec::new();
|
|
r.read(&mut data).await.unwrap();
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
|
|
// should lint
|
|
let mut data2 = Vec::new();
|
|
r.read_exact(&mut data2).await.unwrap();
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
}
|
|
|
|
async fn test_tokio<R: TokioAsyncRead + Unpin>(r: &mut R) {
|
|
// should lint
|
|
let mut data = Vec::new();
|
|
r.read(&mut data).await.unwrap();
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
|
|
// should lint
|
|
let mut data2 = Vec::new();
|
|
r.read_exact(&mut data2).await.unwrap();
|
|
//~^ ERROR: reading zero byte data to `Vec`
|
|
}
|
|
|
|
fn main() {}
|