#[error("...")]
- inside format string:
#[error("{var}")]#[error("{0}")]
- as format string arg:
#[error("{}", .var)]#[error("{}", .0)]
Examples
Arguments
use thiserror::Error;
#[derive(Error, Debug)]
pub enum Error {
#[error("first letter must be lowercase but was {:?}", first_char(.0))]
WrongCase(String),
#[error("invalid index {idx}, expected at least {} and at most {}", .limits.lo, .limits.hi)]
OutOfBounds { idx: usize, limits: Limits },
}