Function rmp::encode::write_ext_meta

pub fn write_ext_meta<W: RmpWrite>(
    wr: &mut W, 
    len: u32, 
    ty: i8
) -> Result<Marker, ValueWriteError<W::Error>>

Encodes and attempts to write the most efficient ext metadata implementation to the given write, returning the marker used.

Errors

This function will return ValueWriteError on any I/O error occurred while writing either the marker or the data.

Panics

Panics if ty is negative, because it is reserved for future MessagePack extension including 2-byte type information.