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use core::fmt::{self, Display, Formatter}; use core::num::ParseIntError; #[cfg(feature = "std")] use std::error::Error; #[derive(Debug, Clone)] pub enum UnsignedIntegerError { ParseIntError(ParseIntError), TooLarge, TooSmall, Forbidden, } impl From<ParseIntError> for UnsignedIntegerError { #[inline] fn from(error: ParseIntError) -> Self { UnsignedIntegerError::ParseIntError(error) } } impl Display for UnsignedIntegerError { #[inline] fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> { match self { UnsignedIntegerError::ParseIntError(error) => Display::fmt(error, f), UnsignedIntegerError::TooLarge => f.write_str("integer is too large"), UnsignedIntegerError::TooSmall => f.write_str("integer is too small"), UnsignedIntegerError::Forbidden => f.write_str("integer is forbidden"), } } } #[cfg(feature = "std")] impl Error for UnsignedIntegerError {}