Macro inquire::required [−][src]
macro_rules! required {
() => { ... };
($message : expr) => { ... };
}
Expand description
Built-in validator that checks whether the answer is not empty.
Arguments
$message
- optional - Error message returned by the validator. Defaults to “A response is required.”
Examples
use inquire::{required, validator::{InquireLength, StringValidator}};
let validator: StringValidator = required!();
assert_eq!(Ok(()), validator("Generic input"));
assert_eq!(Err(String::from("A response is required.")), validator(""));
let validator: StringValidator = required!("No empty!");
assert_eq!(Ok(()), validator("Generic input"));
assert_eq!(Err(String::from("No empty!")), validator(""));