Struct Io 

#[non_exhaustive]
pub struct Io<R: Read, W: Write, E: Write> {
    pub stdin: R,
    pub stdout: W,
    pub stderr: E,
}

Explicit I/O handles for run.

The binary’s main wraps stdin().lock(), stdout().lock(), and stderr().lock(); tests use byte slices and Vec<u8> writers. Holding the three together avoids threading three generics through the call sites.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

stdin: R

Standard input source (the records to cluster).

stdout: W

Standard output sink (the rendered envelope).

stderr: E

Standard error sink (--verbose provenance + skip warnings).

Implementations

impl<R: Read, W: Write, E: Write> Io<R, W, E>

pub fn new(stdin: R, stdout: W, stderr: E) -> Self

Construct explicit handles for one run invocation.