Macro inquire::length [−][src]
macro_rules! length { ($length : expr) => { ... }; ($length : expr, $message : expr) => { ... }; }
Expand description
Built-in validator that checks whether the answer length is equal to the specified value.
Be careful when using this as a StringValidator. The len()
method used
in this validator is not the best tool for that. See this
StackOverflow question
Arguments
$length
- Expected length of the input.$message
- optional - Error message returned by the validator. Defaults to “The length of the response should be $length”
Examples
use inquire::{length, validator::StringValidator}; let validator: StringValidator = length!(3); assert_eq!(Ok(()), validator("Yes")); assert_eq!(Err(String::from("The length of the response should be 3")), validator("No")); let validator: StringValidator = length!(3, "Three characters please."); assert_eq!(Ok(()), validator("Yes")); assert_eq!(Err(String::from("Three characters please.")), validator("No"));