Struct buf_redux::policy::StdPolicy

pub struct StdPolicy;

Default policy for both BufReader and BufWriter that reproduces the behaviors of their std::io counterparts:

• BufReader: only reads when the buffer is empty, does not resize or move data.
• BufWriter: only flushes the buffer when there is not enough room for an incoming write.

Trait Implementations

impl Debug for StdPolicy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StdPolicy

fn default() -> StdPolicy

Returns the “default value” for a type.

impl ReaderPolicy for StdPolicy

Behavior of std::io::BufReader: the buffer will only be read into if it is empty.

fn before_read(&mut self, buffer: &mut Buffer) -> DoRead

Consulted before attempting to read into the buffer.

fn after_consume(&mut self, _buffer: &mut Buffer, _amt: usize)

Called after bytes are consumed from the buffer.

impl WriterPolicy for StdPolicy

Default behavior of std::io::BufWriter: flush before a read into the buffer only if the incoming data is larger than the buffer’s writable space.

fn before_write(&mut self, buf: &mut Buffer, incoming: usize) -> FlushAmt

Return FlushAmt(n > 0) if the buffer should be flushed before reading into it. If the returned amount is 0 or greater than the amount of buffered data, no flush is performed.

fn after_write(&mut self, _buf: &Buffer) -> FlushAmt

Return true if the buffer should be flushed after reading into it.