#[macro_use] extern crate validator_derive; extern crate validator; use validator::Validate; #[derive(Validate)] //~^ ERROR: proc-macro derive panicked //~^^ HELP: Invalid attribute #[validate] on field `s`: Validator `range` requires at least 1 argument out of `min` and `max` struct Test { #[validate(range())] s: i32, } fn main() {}