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use core::fmt::{self, Display, Formatter}; use core::num::ParseFloatError; #[cfg(feature = "std")] use std::error::Error; #[derive(Debug, Clone)] pub enum NumberError { ParseFloatError(ParseFloatError), TooLarge, TooSmall, Forbidden, NaNMust, NaNNotAllow, } impl From<ParseFloatError> for NumberError { #[inline] fn from(error: ParseFloatError) -> Self { NumberError::ParseFloatError(error) } } impl Display for NumberError { #[inline] fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> { match self { NumberError::ParseFloatError(error) => Display::fmt(error, f), NumberError::TooLarge => f.write_str("number is too large"), NumberError::TooSmall => f.write_str("number is too small"), NumberError::Forbidden => f.write_str("number is forbidden"), NumberError::NaNMust => f.write_str("must be NaN"), NumberError::NaNNotAllow => f.write_str("must not be NaN"), } } } #[cfg(feature = "std")] impl Error for NumberError {}