Graceful error handling 2

Let's improve previous example a little bit by returning a custom error type instead of a plain string. This will allow us to define specific error types and provide more structured error handling.

Your Task

The logic of the function remains the same as the previous challenge, but the returned error type is what you need to change.

Define an enum ParsePercentageError with the following variants:
- InvalidInput: for inputs that cannot be parsed as numbers.
- OutOfRange: for numbers that are not in the range 0-100.
Implement the Error trait for ParsePercentageError. Use the std::error::Error trait and provide human-readable descriptions for each error.
Update the parse_percentage function to:
- Return Ok(u8) if the input is a valid percentage (between 0 and 100).
- Return Err(ParsePercentageError::OutOfRange) if the number is out of range.
- Return Err(ParsePercentageError::InvalidInput) if the input is not a valid number.

Hints

Click here to reveal hints

The std::error::Error trait requires implementing the Display and Debug traits. You can derive Debug by #[derive(Debug)] and implement Display manually.
Use the std::fmt module to implement Display for the error enum, which is required for the Error trait.

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Solutions

anhdoo

TuanAnhDoHoang

3 days ago

4.26ms

87.95kb

use std::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(PartialEq, Debug)]
pub enum ParsePercentageError{
    InvalidInput,
   OutOfRange,
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError{
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result{
        match self{
            ParsePercentageError::InvalidInput => {
                write!(f, "anhdoo")
            }
            ParsePercentageError::OutOfRange => {
                write!(f, "anhdoooo")
            }
        }
    }
}
impl Error for ParsePercentageError{
    fn source(&self) -> Option<&(dyn Error + 'static)>{
       None 
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(value) => {
            if value <= 100 {
               Ok(value) 
            }
            else{
                Err(ParsePercentageError::OutOfRange)
            }
        }
        Err(_e) => {
            Err(ParsePercentageError::InvalidInput)
        }
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Teimur Gasanov

teimurjan

5 days ago

3.98ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
impl std::error::Error for ParsePercentageError {}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n) => {
            if n > 100 {
                Err(ParsePercentageError::OutOfRange)
            } else {
                Ok(n)
            }
        },
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

adamegao

6 days ago

3.65ms

87.95kb

use std::{error::Error, fmt::Display};
#[derive(Debug, PartialEq, Eq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{:?}", self)
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) => {
            if n <= 100 {
                Ok(n)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Seth Wood

seth-wood

6 days ago

3.46ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input for percentage parsing"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage value out of allowed range"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) if n <= 100 => Ok(n),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Kanak Shilledar

kanakshilledar

7 days ago

5.00ms

87.95kb

use std::error::Error;
use std::fmt::Display;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n) => {
            if n > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            Ok(n)
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Nicolai

Posmac

9 days ago

3.98ms

87.95kb

use std::error::Error;
use std::fmt::Display;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n) => {
            if n > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            Ok(n)
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Thomastienn

12 days ago

3.83ms

87.95kb

use std::error::Error;
use std::fmt::Display;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n) => {
            if n > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            Ok(n)
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Thomastienn

12 days ago

4.30ms

87.95kb

use std::error::Error;
use std::fmt::Display;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n) => {
            if n > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            Ok(n)
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Health-Care-Movie

12 days ago

4.54ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt::Display;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> { 
        match self {
            Self::InvalidInput => write!(f, "Invalid input"),
            Self::OutOfRange => write!(f, "Out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n @ 0..=100) => Ok(n),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        _ => Err(ParsePercentageError::InvalidInput),
    } 
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Elizabeth Doughty

Thymelizabeth

12 days ago

4.24ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> { 
        match self {
            Self::InvalidInput => write!(f, "Invalid input"),
            Self::OutOfRange => write!(f, "Out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse() {
        Ok(n @ 0..=100) => Ok(n),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Splatrac

splatrac

13 days ago

34.10ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "The input was invalid. Please use a number"),
            ParsePercentageError::OutOfRange => write!(f, "The input was out of range. Please use a number between 0 and 100")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(num) => {
            if num <= 100 {
                Ok(num)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Nguyen Vo Hoang Son

sonmessia

13 days ago

4.01ms

87.95kb

use std::error::Error;
use std::fmt::Display;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_fmt(format_args!("The error is {}", self))
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(value) => if value <= 100 {
            Ok(value)
        } else {
            Err(ParsePercentageError::OutOfRange)
        },
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Trịnh Chấn Duy

Duyyy123

15 days ago

4.22ms

87.95kb

use std::error::Error;
use std::fmt::Display;
// 1. Finish the definition
#[derive(PartialEq, Debug)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput,
}
impl Display for ParsePercentageError {
    // add code here
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_fmt(format_args!("The error is {}", self))
    }
}
impl Error for ParsePercentageError {
    // add code here
}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    input
        .parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)
        .and_then(|value| {
            if value <= 100 {
                Ok(value)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        })
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

agamaontherock

18 days ago

3.20ms

87.95kb

use std::fmt::Formatter;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl std::fmt::Display for ParsePercentageError { 
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result{
        match self {
            ParsePercentageError::InvalidInput =>  write!(f, "invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "out of range"),
        }
    }
    
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(value) => if value <= 100 { 
            Ok(value)
        } else { 
            Err(ParsePercentageError::OutOfRange)
        },
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Liyqq

18 days ago

3.87ms

87.95kb

// 1. Finish the definition
use std::fmt::Debug;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "ParsePercentageError::OutOfRange"),
            ParsePercentageError::OutOfRange => write!(f, "ParsePercentageError::InvalidInput"),
        }
    }
}
impl std::error::Error for ParsePercentageError { }
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(p @ 0..=100) => Ok(p),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Liyqq

18 days ago

4.62ms

87.95kb

// 1. Finish the definition
use std::fmt::Debug;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "ParsePercentageError::OutOfRange"),
            ParsePercentageError::OutOfRange => write!(f, "ParsePercentageError::InvalidInput"),
        }
    }
}
impl std::error::Error for ParsePercentageError { }
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(p@ 0..=100) => Ok(p),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Neel Knight

NeelKnight

a month ago

4.32ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range!"),
        }
    }
}
impl std::error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(num) => if num <= 100 {
            Ok(num)
        } else {
            Err(ParsePercentageError::OutOfRange)
        },
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Maintain

duonghb53

a month ago

3.83ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {
}
// 2. Implement the `Error` trait
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse() {
        Ok(num) => {
            if num > 100 || num < 0 {
                return Err(ParsePercentageError::OutOfRange);
            } else {
                return Ok(num);
            }
        },
        Err(_) => {
            return Err(ParsePercentageError::InvalidInput);
        }
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Nathan GAUD

Natchica

a month ago

3.54ms

87.95kb

use std::error::Error;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) => {
            if n <= 100 { Ok(n) }
            else { Err(ParsePercentageError::OutOfRange) }
        },
        Err(..) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Paolo Cancedda

Pac72

a month ago

3.61ms

87.95kb

use std::error::Error;
use std::str::FromStr;
use std::fmt::{ Display, Formatter };
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
        write!(f, "{:?}", self)
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError { }
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match u8::from_str(input) {
        Ok(value) => {
            if value <= 100 {
                Ok(value)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        Err(_) => {
            Err(ParsePercentageError::InvalidInput)
        }
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

mishbah

a month ago

4.57ms

87.95kb

use std::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Error for ParsePercentageError {
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match &self {
            ParsePercentageError::InvalidInput => write!(f, "ParsePercentageError::InvalidInput"),
            ParsePercentageError::OutOfRange => write!(f, "ParsePercentageError::OutOfRange")
        }
    }
}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(x) => match x {
            n if n <= 100 => Ok(n),
            _ => Err(ParsePercentageError::OutOfRange),
        },
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

torbenhardt

a month ago

3.39ms

87.95kb

use std::error::Error;
use std::fmt;
use std::str::FromStr;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
     InvalidInput,
     OutOfRange,
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match &self {
            ParsePercentageError::InvalidInput => write!(f, "ParsePercentageError::InvalidInput"),
            ParsePercentageError::OutOfRange => write!(f, "ParsePercentageError::OutOfRange")
        }
    }
}
impl Error for ParsePercentageError {
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let res = u8::from_str(input);
    match res {
        Ok(n) => {
            if n > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            return Ok(n)
        },
        Err(_) => return Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

asdfman

a month ago

3.98ms

87.95kb

use std::{error::Error, fmt};
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "out of range")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(val) if val <= 100 => Ok(val),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

RASHMOR

RASHMOR1

a month ago

3.90ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl std::error::Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Number is out of range (0-100"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(percentage) => {
            if  percentage <= 100 {
                Ok(percentage)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        }
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Jakub Wiśniewski

wisniewskij

a month ago

3.86ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl std::error::Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Number is out of range (0-100"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(percentage) => {
            if percentage >= 0 && percentage <= 100 {
                Ok(percentage)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        }
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

vijayabhaskar badireddi

ptcte

a month ago

5.83ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Number is out of range (0-100"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(percentage) if percentage <= 100 => Ok(percentage),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Nguyen Vo Hoang Son

sonmessia

a month ago

3.69ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Number is out of range (0-100"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(percentage) if percentage <= 100 => Ok(percentage),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Jason

Jason-fy-wang

a month ago

3.82ms

87.95kb

use std::fmt::Formatter;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError{
    InvalidInput,
    OutOfRange,
}
impl std::fmt::Display for ParsePercentageError {
     fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input format"),
            ParsePercentageError::OutOfRange => write!(f, "Value is out of range (0-100)"),
        }
    }
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError{
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(num)=> {
            if  num<=100 {
                Ok(num)
            }else{
                Err(ParsePercentageError::OutOfRange)
            }
        },
        Err(_e) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Nhat Vu

NhatTinyVu

a month ago

3.99ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Number is out of range (0-100)"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(percentage) if percentage <= 100 => Ok(percentage),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Haritarth Bhardwaj

Haritarth

a month ago

4.31ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self,  f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Cannot be parsed as Number."),
            Self::OutOfRange => write!(f, "Number is out of range..")
        }
    }   
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(num) if num <= 100 => Ok(num),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Levio-z

a month ago

3.39ms

87.95kb

// 1. Finish the definition
use std::fmt;
use std::error::Error;
#[derive(Debug,PartialEq)]
pub enum ParsePercentageError{
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError{
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Input is not a valid number."),
            Self::OutOfRange   => write!(f, "Number is out of the valid range.")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n) => {
            if n>100{
                Err(ParsePercentageError::OutOfRange)
            }else{
                Ok(n)
            }
        }  // 输出: 转换后的数字是: 123
        Err(_) => {
            Err(ParsePercentageError::InvalidInput)
        }
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

shibu-t

a month ago

4.17ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError{}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Input is not a valid number."),
            Self::OutOfRange   => write!(f, "Number is out of the valid range.")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(num) if num <= 100 => Ok(num),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Marcel Schiffel

mschiffel

a month ago

4.43ms

87.95kb

use std::fmt::Display;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        todo!()
    }
}
impl std::error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let number = input.parse::<u8>();
    match number {
        Ok(number) => {
            if number <= 100 {
                Ok(number)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        }
        _ => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Assylbek Razakhbergenov

asylbek27

a month ago

3.46ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Invalid input"),
            Self::OutOfRange => write!(f, "Percentage out of range")
        }        
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    if let Ok(num) = input.parse::<i32>() {
        if num < 0 || num > 100 {
            return Err(ParsePercentageError::OutOfRange);
        } else {
            return Ok(num as u8);
        }
    }
    return Err(ParsePercentageError::InvalidInput);
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

ON-MX

a month ago

5.01ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError{
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError{}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Input is not a valid number."),
            Self::OutOfRange   => write!(f, "Number is out of the valid range.")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let num = input.parse::<u8>();
    match num {
        Ok(n) => {if n <= 100 {return Ok(n);}},
        Err(_)=> return Err(ParsePercentageError::InvalidInput),
    }
    Err(ParsePercentageError::OutOfRange) 
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

roboquaternion

a month ago

3.67ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError{}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Input is not a valid number."),
            Self::OutOfRange   => write!(f, "Number is out of the valid range.")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(num) if num <= 100 => Ok(num),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Kondorok

a month ago

3.58ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => {
                write!(f, "Err(ParsePercentageError::InvalidInput)")
            }
            ParsePercentageError::OutOfRange => write!(f, "Err(ParsePercentageError::OutOfRange)"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(value) => {
            if value > 100 {
                return Err(ParsePercentageError::OutOfRange);
            };
            Ok(value)
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Alissa Villiger

avilliger18

2 months ago

4.15ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError{}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Number is out of the valid range (0-100)")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(num) if num <= 100 => Ok(num),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Douglas Campbell

CampbellD84

2 months ago

5.12ms

87.95kb

use std::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Value is out of range")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let solution = input.parse();
    
    match solution {
        Ok(val) => {
            if val <= 100 {
                Ok(val)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Jason

chenjie1219

2 months ago

5.11ms

87.95kb

use std::{error, fmt};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::InvalidInput => {
                write!(f, "Percentage out of range")
            }
            Self::OutOfRange => {
                write!(f, "Invalid input")
            }
        }
    }
}
impl error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    input
        .parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)
        .and_then(|value| {
            if value > 100 {
                Err(ParsePercentageError::OutOfRange)
            } else {
                Ok(value)
            }
        })
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Yixian Du

duyixian1234

2 months ago

5.92ms

87.95kb

use std::fmt::Display;
use std::error::Error;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl Error for ParsePercentageError {
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) => {
            match value <= 100 {
                true => Ok(value),
                false => Err(ParsePercentageError::OutOfRange)
            }
        },
        _ => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

VerweyFr

2 months ago

4.01ms

87.95kb

use std::fmt::Display;
use std::error::Error;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl Error for ParsePercentageError {
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) => {
            match value <= 100 {
                true => Ok(value),
                false => Err(ParsePercentageError::OutOfRange)
            }
        },
        _ => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

VerweyFr

2 months ago

3.39ms

87.95kb

use std::fmt::Display;
use std::error::Error;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl Error for ParsePercentageError {
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) => {
            match value <= 100 {
                true => Ok(value),
                false => Err(ParsePercentageError::OutOfRange)
            }
        },
        _ => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

rolan

rolan36

2 months ago

5.15ms

87.95kb

use std::{error::Error, fmt};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match *self {
            ParsePercentageError::InvalidInput => write!(f, "The input is not a valid number."),    
            ParsePercentageError::OutOfRange => write!(f, "The input is out of the valid percentage range (0-100)."),
        }
    }     
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
            Ok(value) => {
            match value <= 100 {
                true => Ok(value),
                false => Err(ParsePercentageError::OutOfRange),
            }
        }
            _ => Err(ParsePercentageError::InvalidInput),
    }    
    }
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

gsspdev

2 months ago

18.09ms

87.95kb

use std::error::Error;
use std::fmt::Display;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {
    
    }
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match *self {
            ParsePercentageError::InvalidInput => write!(f, "The input is not a valid number."),
            ParsePercentageError::OutOfRange => write!(f, "The input is out of the valid percentage range (0-100)."),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(x) if x > 100 => Err(ParsePercentageError::OutOfRange),
        Ok(x) => Ok(x),
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

lugtester

2 months ago

3.79ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {
}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match *self {
            ParsePercentageError::InvalidInput => write!(f, "The input is not a valid number."),
            ParsePercentageError::OutOfRange => write!(f, "The input is out of the valid percentage range (0-100)."),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(x) if x > 100 => Err(ParsePercentageError::OutOfRange),
        Ok(x) => Ok(x),
        Err(_) => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Aurimas Kuniutis

auriku

2 months ago

3.60ms

87.95kb

// 1. Finish the definition
use std::{error::Error, fmt};
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError{
    InvalidInput,
    OutOfRange
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", format!("{:?}", self))
    }
}
// 2. Implement the `Error` trait
impl Error for  ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    input
    .parse::<u8>()
    .map_err(|_|ParsePercentageError::InvalidInput)
    .and_then(|result| {
        if let 0..=100 = result {
            Ok(result)
        } else {
            Err(ParsePercentageError::OutOfRange)
        }
    })
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

linz

hnlinzhi19

2 months ago

4.45ms

87.95kb


use std::{error::Error, fmt::Display};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let percent = input
        .parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput);
    if let Ok(v) = percent {
        if v > 100 {
            return Err(ParsePercentageError::OutOfRange);
        }
    }
    percent
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Enriko

rix71

2 months ago

4.97ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "ParsePercentageError::InvalidInput"),
            Self::OutOfRange => write!(f, "ParsePercentageError::OutOfRange")
        }
        
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    input.parse::<u8>().map_err(|_e| ParsePercentageError::InvalidInput).and_then(|n| 
        if n <= 100 {
            Ok(n)
        } else {
            Err(ParsePercentageError::OutOfRange)
        }
    )
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

JeromeCheze

2 months ago

4.33ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Err(ParsePercentageError::InvalidInput)"),
            ParsePercentageError::OutOfRange => write!(f, "Err(ParsePercentageError::OutOfRange)"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let parsed = match input.parse::<u8>() {
        Ok(v) => v,
        Err(_) => return Err(ParsePercentageError::InvalidInput)
    };
    if parsed > 100 {
        return Err(ParsePercentageError::OutOfRange);
    }
    Ok(parsed)
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}