Macro inquire::max_length [−][src]
macro_rules! max_length { ($length : expr) => { ... }; ($length : expr, $message : expr) => { ... }; }
Expand description
Built-in validator that checks whether the answer length is smaller than or equal to the specified threshold.
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
$length
- Maximum length of the input.$message
- optional - Error message returned by the validator. Defaults to “The length of the response should be at most $length”
Examples
use inquire::{max_length, validator::StringValidator}; let validator: StringValidator = max_length!(5); assert_eq!(Ok(()), validator("Good")); assert_eq!(Err(String::from("The length of the response should be at most 5")), validator("Terrible")); let validator: StringValidator = max_length!(5, "Not too large!"); assert_eq!(Ok(()), validator("Good")); assert_eq!(Err(String::from("Not too large!")), validator("Terrible"));