fn try_from()

in math/src/field/f64/mod.rs [466:492]

• 27 lines of code
• 4 McCabe index (conditional complexity)

    fn try_from(bytes: &[u8]) -> Result<Self, Self::Error> {
        if bytes.len() < ELEMENT_BYTES {
            return Err(DeserializationError::InvalidValue(format!(
                "not enough bytes for a full field element; expected {} bytes, but was {} bytes",
                ELEMENT_BYTES,
                bytes.len(),
            )));
        }
        if bytes.len() > ELEMENT_BYTES {
            return Err(DeserializationError::InvalidValue(format!(
                "too many bytes for a field element; expected {} bytes, but was {} bytes",
                ELEMENT_BYTES,
                bytes.len(),
            )));
        }
        let value = bytes
            .try_into()
            .map(u64::from_le_bytes)
            .map_err(|error| DeserializationError::UnknownError(format!("{}", error)))?;
        if value >= M {
            return Err(DeserializationError::InvalidValue(format!(
                "invalid field element: value {} is greater than or equal to the field modulus",
                value
            )));
        }
        Ok(BaseElement::new(value))
    }