Function lexical::parse [−][src]
pub fn parse<N: FromLexical, Bytes: AsRef<[u8]>>(bytes: Bytes) -> Result<N>
High-level conversion of decimal-encoded bytes to a number.
This function only returns a value if the entire string is successfully parsed.
bytes
- Byte slice to convert to number.
Examples
// Create our error. fn err_code<T>(r: lexical::Result<T>) -> ErrorCode { r.err().unwrap().code } // String overloads assert_eq!(lexical::parse::<i32, _>("5"), Ok(5)); assert_eq!(err_code(lexical::parse::<i32, _>("1a")), ErrorCode::InvalidDigit); assert_eq!(lexical::parse::<f32, _>("0"), Ok(0.0)); assert_eq!(lexical::parse::<f32, _>("1.0"), Ok(1.0)); assert_eq!(lexical::parse::<f32, _>("1."), Ok(1.0)); // Bytes overloads assert_eq!(lexical::parse::<i32, _>(b"5"), Ok(5)); assert_eq!(err_code(lexical::parse::<i32, _>(b"1a")), ErrorCode::InvalidDigit); assert_eq!(lexical::parse::<f32, _>(b"0"), Ok(0.0)); assert_eq!(lexical::parse::<f32, _>(b"1.0"), Ok(1.0)); assert_eq!(lexical::parse::<f32, _>(b"1."), Ok(1.0));