Struct Echo 

pub struct Echo<'a, 'b, T> { /* private fields */ }

Input decorator that echoes the input.

This decorator adds the behavior of the verbose shell option to the input. If the option is enabled, the input is echoed to the standard error before it is returned to the caller. Otherwise, the input is returned as is.

Implementations

impl<'a, 'b, T> Echo<'a, 'b, T>

pub fn new(inner: T, env: &'a RefCell<&'b mut Env>) -> Self

Creates a new Echo decorator.

The first argument is the inner Input that performs the actual input operation. The second argument is the shell environment that contains the shell option state and the system interface to print to the standard error. It is wrapped in a RefCell so that it can be shared with other decorators and the parser.

Trait Implementations

impl<'a, 'b, T: Clone> Clone for Echo<'a, 'b, T>

fn clone(&self) -> Echo<'a, 'b, T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, 'b, T: Debug> Debug for Echo<'a, 'b, T>

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

Formats the value using the given formatter.

impl<T> Input for Echo<'_, '_, T>

where T: Input,

async fn next_line(&mut self, context: &Context) -> Result

Reads a next line of the source code.