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pub trait Reader {
// FIXME (#2004): Seekable really should be orthogonal.
/// Read up to len bytes (or EOF) and put them into bytes (which
/// must be at least len bytes long). Return number of bytes read.
// FIXME (#2982): This should probably return an error.
fn read(bytes: &[mut u8], len: uint) -> uint;
}
pub trait ReaderUtil {
/// Read len bytes into a new vec.
fn read_bytes(len: uint);
}
impl<T: Reader> T : ReaderUtil {
fn read_bytes(len: uint) {
let count = self.read(&[mut 0], len);
}
}
struct S {
x: int,
y: int
}
impl S: Reader {
fn read(bytes: &[mut u8], len: uint) -> uint {
0
}
}
fn main() {
let x = S { x: 1, y: 2 };
let x = x as @Reader;
x.read_bytes(0);
}
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