Struct DefaultSource 

pub struct DefaultSource<T: Clone + Send + Sync> { /* private fields */ }

Provide a default value when no other source has input.

This source is always available and always returns the configured value. It should typically be the last source in a chain.

Example

use standout_input::{InputChain, ArgSource, DefaultSource};

let chain = InputChain::<String>::new()
    .try_source(ArgSource::new("message"))
    .try_source(DefaultSource::new("default message"));

Implementations

impl<T: Clone + Send + Sync> DefaultSource<T>

pub fn new(value: T) -> Self

Create a new default source with the given value.

pub fn value(&self) -> &T

Get the default value.

Trait Implementations

impl<T: Clone + Clone + Send + Sync> Clone for DefaultSource<T>

fn clone(&self) -> DefaultSource<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Clone + Send + Sync> Debug for DefaultSource<T>

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

Formats the value using the given formatter.

impl<T: Clone + Send + Sync + 'static> InputCollector<T> for DefaultSource<T>

fn name(&self) -> &'static str

Human-readable name for this collector.

fn is_available(&self, _matches: &ArgMatches) -> bool

Check if this collector can provide input in the current environment.

fn collect(&self, _matches: &ArgMatches) -> Result<Option<T>, InputError>

Attempt to collect input from this source.

fn validate(&self, _value: &T) -> Result<(), String>

Validate the collected value.

fn can_retry(&self) -> bool

Whether this collector supports retry on validation failure.