ReadBuffer

buffer

Trait ReadBuffer 

Source 
pub trait ReadBuffer: ReadBufferRef {
    // Provided method
    fn read_buffer<'d, B: Buffer<'d>>(&mut self, buf: B) -> Result<&'d [u8]> { ... }
}
Expand description

Trait to read to T: Buffer.

This trait should be imported to read into buffers.

Provided Methods§

Source

fn read_buffer<'d, B: Buffer<'d>>(&mut self, buf: B) -> Result<&'d [u8]>

Reads (equivalently to Read::read) into the buffer and returns the newly read bytes.

Examples found in repository?
examples/example.rs (line 18)
8fn main() {
9    let filename = env::temp_dir().join("rust_buffer_test.txt");
10    {
11        let mut f = File::create(&filename).unwrap();
12        f.write(&[1; 256]).unwrap();
13    }
14    {
15        let mut contents = Vec::with_capacity(1);
16        let mut f = File::open(&filename).unwrap();
17        loop {
18            let len = f.read_buffer(&mut contents).unwrap().len();
19            println!("{:3} {:3}/{:3}", len, contents.len(), contents.capacity());
20            if len == 0 {
21                break;
22            }
23            if contents.len() == contents.capacity() {
24                let len = contents.len();
25                contents.reserve(len);
26            }
27        }
28    }
29}

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§