Enum StdinSource 

pub enum StdinSource {
    Terminal,
    Foreign,
    Stream,
}

Whether stdin holds input for this turn.

a consumes stdin so cargo test 2>&1 | a "fix this" works. Consuming it whenever it merely is not a terminal is wrong: a supervisor or sandbox hands its child a socket that may never carry anything, and reading it blocks forever.

A pipe or a redirected file is read to end of file, however long the producer takes, because writing the pipe is how the user asked for that. Waiting is what every filter does; giving up early would silently drop the input of a producer that is simply slow to start.

Variants

Terminal

Foreign

Not a pipe or file: an inherited channel that is not this turn’s input.

Stream

Trait Implementations

impl Clone for StdinSource

fn clone(&self) -> StdinSource

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for StdinSource

impl Debug for StdinSource

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

Formats the value using the given formatter.

impl Eq for StdinSource

impl PartialEq for StdinSource

fn eq(&self, other: &StdinSource) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for StdinSource