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