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

Anthony Young

A-Young-Git

20 hours ago

4.34ms

87.95kb

use std::{error::Error, 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 {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input. Enter a number between 0 and 100"),
            ParsePercentageError::OutOfRange => write!(f, "Out of range input. Enter a number between 0 and 100"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
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)
}

Özgür

AyikOzgur

a day ago

3.85ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[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, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let value = input.parse();
    match value {
        Ok(value) => {
            if value >= 0 && value <= 100 {
                return Ok(value);
            } else {
                return Err(ParsePercentageError::OutOfRange);
            }
        }
        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)
}

emiludenz

a day ago

3.26ms

87.95kb

use std::error::Error;
use std::fmt::{Debug, Display, Formatter};
// 1. Finish the definition
#[derive(Debug)]
#[derive(PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Display for ParsePercentageError {
    fn fmt(&self, _f: &mut Formatter<'_>) -> std::fmt::Result {
        todo!()
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let n = input.parse::<u8>();
    if n.is_ok() {
        let num = n.unwrap();
        if num <= 100 {
            Ok(num)
        } else {
            Err(ParsePercentageError::OutOfRange)
        }
    } else {
        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)
}

azmahflameheart

3 days ago

5.03ms

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, _: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> { 
        Ok(())
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.trim().parse::<i32>() {
        Err(_) => Err(ParsePercentageError::InvalidInput),
        Ok(n) if n > 100 || n < 0 => Err(ParsePercentageError::OutOfRange),
        Ok(n) => Ok(n as u8),
    }   
}
// 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)
}

Egu0

egu0

3 days ago

3.34ms

87.95kb

use std::error;
use std::fmt;
#[derive(PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl std::fmt::Debug for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
        match self {
            Self::InvalidInput => write!(f, "ParsePercentageError::InvalidInput"),
            Self::OutOfRange => write!(f, "ParsePercentageError::OutOfRange"),
        }
    }
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, _: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
        Ok(())
    }
}
impl error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let mut target: u8 = 0;
    for &b in input.as_bytes() {
        if (48..=57).contains(&b) {
            target *= 10;
            target += b - 48;
        } else {
            return Err(ParsePercentageError::InvalidInput);
        }
    }
    if target > 100 {
        return Err(ParsePercentageError::OutOfRange);
    }
    Ok(target)
}

Egu0

egu0

3 days ago

3.79ms

87.95kb

use std::error;
use std::fmt;
#[derive(PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl std::fmt::Debug for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
        match self {
            Self::InvalidInput => write!(f, "ParsePercentageError::InvalidInput"),
            Self::OutOfRange => write!(f, "ParsePercentageError::OutOfRange"),
        }
    }
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, _: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
        Ok(())
    }
}
impl error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let mut target: u8 = 0;
    for &b in input.as_bytes() {
        if (48..=57).contains(&b) {
            target *= 10;
            target += b - 48;
        } else {
            return Err(ParsePercentageError::InvalidInput);
        }
    }
    if target > 100 {
        return Err(ParsePercentageError::OutOfRange);
    }
    Ok(target)
}

Marouan Boulahtouf

MBoulahtouf

4 days ago

3.39ms

87.95kb

use std::fmt;
use std::error::Error;
#[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::OutOfRange => write!(f, "Percentage out of range"),
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let num = input.parse::<i32>().map_err(|_| ParsePercentageError::InvalidInput)?;
    if (0..=100).contains(&num) {
        Ok(num as u8)
    } else {
        Err(ParsePercentageError::OutOfRange)
    }
}
#[cfg(test)]
mod tests {
    use super::*;
    #[test]
    fn test_parse_percentage() {
        // Test valid input
        assert_eq!(parse_percentage("75"), Ok(75));
        assert_eq!(parse_percentage("0"), Ok(0));
        assert_eq!(parse_percentage("100"), Ok(100));
        // Test out of range input
        assert!(matches!(parse_percentage("150"), Err(ParsePercentageError::OutOfRange)));
        // Test invalid input
        assert!(matches!(parse_percentage("abc"), Err(ParsePercentageError::InvalidInput)));
    }
}

LawisChen

6 days ago

3.43ms

87.95kb

use std::error::Error;
use std::fmt::{Display, Formatter};
// 1. Finish the definition
#[derive(Debug, Eq, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        f.write_str(format!("{:?}", self).as_str())
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    if let Ok(parsed) = i32::from_str_radix(input, 10) {
        return match parsed {
            0..=100 => Ok(parsed as u8),
            _ => Err(ParsePercentageError::OutOfRange),
        };
    }
    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)
}

LawisChen

6 days ago

4.75ms

87.95kb

use std::error::Error;
use std::fmt::{Display, Formatter};
// 1. Finish the definition
#[derive(Debug, Eq, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => f.write_str("InvalidInput"),
            ParsePercentageError::OutOfRange => f.write_str("OutOfRange"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    if let Ok(parsed) = i32::from_str_radix(input, 10) {
        return match parsed {
            0..=100 => Ok(parsed as u8),
            _ => Err(ParsePercentageError::OutOfRange),
        };
    }
    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)
}

batblerone

6 days ago

3.80ms

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 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> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(i) => if i <= 100 { Ok(i) } 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)
}

ffrie

6 days ago

3.83ms

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 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> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(a) => if a <= 100 {Ok(a)} 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)
}

Ramon Silva

rsilva1

7 days ago

3.39ms

87.95kb

// 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<'_>) -> Result<(), std::fmt::Error> {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Err(ParsePercentageError::InvalidInput)"),
            ParsePercentageError::OutOfRange => write!(f, "Err(ParsePercentageError::OutOfRange)"),
        }
    }
}
impl std::error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let percentage = input.parse::<u8>().map_err(|_| ParsePercentageError::InvalidInput)?;
    if percentage <= 100 {
        Ok(percentage)
    } 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)
}

vqk-2003

7 days ago

3.47ms

87.95kb

// 1. Finish the definition
#[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 {
            Self::InvalidInput => write!(f, "ParsePercentageError::InvalidInput"),
            Self::OutOfRange => write!(f, "ParsePercentageError::OutOfRange"),
        }
    }
}
// 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)
}

Snoweuph

snoweuph

10 days ago

3.46ms

87.95kb

use std::{error::Error, 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 {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid Input"),
            ParsePercentageError::OutOfRange => write!(f, "Out of Range"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) => {
            if value > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            Ok(value)
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}

Snoweuph

snoweuph

10 days ago

3.09ms

87.95kb

use std::{
    error::Error,
    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 {
        write!(f, "Test")
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) => {
            if value > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            Ok(value)
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}

Amit Patel

amitpatel-wstf

11 days ago

3.97ms

87.95kb

use std::{error::Error, fmt::Display};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
use ParsePercentageError::{InvalidInput, OutOfRange};
impl Error for ParsePercentageError {
    fn description(&self) -> &str {
        match self {
            InvalidInput => "Err(ParsePercentageError::InvalidInput)",
            OutOfRange => "Err(ParsePercentageError::OutOfRange)",
        }
    }
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.description())
    }
}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse() {
        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)
}

makinpaper

11 days ago

3.81ms

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, "Err(ParsePercentageError::InvalidInput)")
            }
            ParsePercentageError::OutOfRange => write!(f, "Err(ParsePercentageError::OutOfRange)"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse() {
        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)
}

Dan Wayne

danwayne-me

11 days ago

3.35ms

87.95kb

use std::{error::Error, fmt::Display};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
use ParsePercentageError::{InvalidInput, OutOfRange};
impl Error for ParsePercentageError {
    fn description(&self) -> &str {
        match self {
            InvalidInput => "Err(ParsePercentageError::InvalidInput)",
            OutOfRange => "Err(ParsePercentageError::OutOfRange)",
        }
    }
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.description())
    }
}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let Ok(n): Result<i32, _> = input.parse() else {
        return Err(ParsePercentageError::InvalidInput);
    };
    if n < 0 || n > 100 {
        return Err(ParsePercentageError::OutOfRange);
    }
    Ok(n as u8)
}
// 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)
}

<YoungAncient/>

youngancient

12 days ago

3.57ms

87.95kb

use std::error::Error;
use std::fmt::{Display,Result as FmtResult,Formatter};
// 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 Formatter<'_>) -> FmtResult {
        match self {
            Self::InvalidInput => write!(f, "Invalid input: not a valid number"),
            Self::OutOfRange => write!(f, "Value out of range: must be between 0 and 100"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>(){
        Ok(value) => {
            if (0..=100).contains(&value){
                return Ok(value);
            }else{
                return 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)
}

Ignat S.

Igonato

13 days ago

3.21ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput,
}
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"),
        }
    }
}
// 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 @ 0..=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)
}

gtakacse

15 days ago

3.61ms

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(num) if num > 100 => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
        Ok(num) => Ok(num),
    }
}
// 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)
}

SpontaneousOverthrow

15 days ago

3.84ms

87.95kb

use std::fmt;
#[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 must be between 0-100" )
        }
    }
}
impl std::error::Error for ParsePercentageError { }
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) if n <= 100 => return Ok(n),
        Ok(n) if n > 100 => return Err(ParsePercentageError::OutOfRange),
        _ => 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)
}

cmdrtomalak

15 days ago

3.84ms

87.95kb

use std::fmt;
#[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 must be between 0-100" )
        }
    }
}
impl std::error::Error for ParsePercentageError { }
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) if n <= 100 => return Ok(n),
        Ok(n) if n > 100 => return Err(ParsePercentageError::OutOfRange),
        _ => return Err(ParsePercentageError::InvalidInput)
    }
}
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)
}

Tim Boex

tboex

16 days ago

3.32ms

87.95kb

use std::{error::Error, fmt};
#[derive(Debug, PartialEq, Eq)]
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> {
    let value = input.parse::<u8>();
    match value {
        Ok(v) => match v {
            0..=100 => Ok(v),
            _ => 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)
}

MöNir

Monir-Ruet

18 days ago

3.65ms

87.95kb

use std::error::Error;
use std::fmt;
#[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)"),
        }
    }
}
impl Error for ParsePercentageError {}
// 2. Implement the `Error` trait
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)
}

Omar Saber Talaat Abdelrahman

omar-s-ta

18 days ago

3.36ms

87.95kb

use std::{error::Error, fmt::Display};
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl 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(value) if value <= 100 => Ok(value),
        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)
}

Omar Saber Talaat Abdelrahman

omar-s-ta

18 days ago

3.46ms

87.95kb

use std::{error::Error, 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 Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) if value <= 100 => Ok(value),
        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)
}

Dharm Singh

dharmvr1

21 days ago

4.11ms

87.95kb

use std::u8;
use std::fmt;
use std::error::Error;
// use std::collections::HashMap;
// use clap::Parser;
// 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::OutOfRange=>write!(f, "ParsePercentageError::OutOfRange"),
            ParsePercentageError::InvalidInput => write!(f,"ParsePercentageError::InvalidInput")
            
        }
     }
    
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let num = input
        .parse::<u8>()
        .map_err(|_| ("invalid input").to_string());
    match num {
        Ok(x) => {
            if  x <= 100 {
                Ok(x)
            }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)
}

Kishan

wdcs-kishansudani

21 days ago

4.83ms

87.95kb

use std::error::Error;
use std::fmt::{self, Display};
#[derive(Debug, PartialEq, Eq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid string input."),
            ParsePercentageError::OutOfRange => write!(f, "The number is out of range."),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(x) => {
            if x > 100 {
                Err(ParsePercentageError::OutOfRange)
            } else {
                Ok(x)
            }
        }
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
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)
}

Gerasimos

glomvardos

23 days ago

3.63ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
 #[derive(Debug, PartialEq, Eq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
          ParsePercentageError::OutOfRange => write!(f, "Input should be between 0 and 100"),
          ParsePercentageError::InvalidInput => write!(f, "Invalid input")
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    if let Some(num) = input.parse::<u8>().ok() {
        if num <= 100 {
            return Ok(num);
        };
        return Err(ParsePercentageError::OutOfRange);
    }
    
    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)
}

kasaxpong

24 days ago

3.31ms

87.95kb

use std::fmt;
use std::error::Error;
#[derive(Debug, PartialEq)]
// 1. Finish the definition
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 string input."),
            ParsePercentageError::OutOfRange => write!(f, "The number is out of range.")
        }
    }
}
impl Error for ParsePercentageError {}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
   match input.parse::<u8>() {
    Ok(value) => {
        if value > 100 {
            return Err(ParsePercentageError::OutOfRange);
        } return Ok(value);
    },
    Err(_) => Err(ParsePercentageError::InvalidInput)
   }
    // 3. Implement this function
}
// 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(ParsePercentageE
    
    
   
}

Mykhailo Huzhvii

Ymkavi

24 days ago

3.68ms

87.95kb

use std::fmt;
use std::error::Error;
#[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 string input."),
            ParsePercentageError::OutOfRange => write!(f, "The number is out of range.")
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) => {
            if value > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            return 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)
}

yrd241

a month ago

3.27ms

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 {
        write!(f, "Err({:?})", 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(number) => {
            if number <= 100 {
                return Ok(number);
            } else{
                return Err(ParsePercentageError::OutOfRange);
            }
        }
        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)
}

matthew-snyder

a month ago

3.52ms

87.95kb

// 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 {
        write!(f, "Err({:?})", self)
    }
}
impl std::error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let result = input.parse::<u8>();
    match result{
        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)
}

银雀Sparrxw

Sparr0www820

a month ago

3.98ms

87.95kb

// 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 {
        write!(f, "Err({:?})", self)
    }
}
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),
        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)
}

ychanghe

a month ago

4.18ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput, 
    OutOfRange
}
// 2. Implement the `Error` trait
use std::error::Error; // 이게 뭐에요?
impl std::fmt::Display for ParsePercentageError {
    fn fmt (&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result{
        match self {
            ParsePercentageError::InvalidInput => write!(f, "input cannot be parsed as number. "), 
            ParsePercentageError::OutOfRange => write!(f, "input is not int the range 0-100. ")
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    if input.is_empty() {
        return Err(ParsePercentageError::InvalidInput);
    }
    else {
        let mut sum: u8 = 0; 
        for c in input.chars() {
            if let Some(digit) = c.to_digit(10) {
                sum = 10*sum + (digit as u8); 
                if sum > 100 {
                    return Err(ParsePercentageError::OutOfRange); 
                }
            }
            else {
                return Err(ParsePercentageError::InvalidInput); 
            }
        }
        return Ok(sum);
    }
}
// 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)
}

Bastien VINH

bastienvinh

a month ago

3.89ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq, Clone, Copy)]
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, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range (0‑100)"),
        }
    }
}
impl std::error::Error for ParsePercentageError {}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let result = input.parse();
    if let Err(..) = result {
        Err(ParsePercentageError::InvalidInput)
    } else {
        let parsed_percentage = result.unwrap();
        if parsed_percentage > 100 {
            Err(ParsePercentageError::OutOfRange)
        } else {
            Ok(parsed_percentage)
        }
    }
}
// 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)
}

gibransomerville

a month ago

4.03ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, Eq, 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"),
            ParsePercentageError::OutOfRange => write!(f, "Out of range (0-100)"),
        }
    }
}
impl 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),
        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)
}

/sam

samging

a month ago

3.73ms

87.95kb

use std::error::Error;
use std::fmt;
/// Define the custom error type with two variants
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
/// Implement Display to provide human-readable messages
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "The input is not a valid number."),
            ParsePercentageError::OutOfRange => write!(f, "The number is not in the range 0-100."),
        }
    }
}
/// Implement the Error trait to integrate with standard error handling
impl Error for ParsePercentageError {}
/// Parses a string into a u8 percentage with custom error handling
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.trim().parse::<u8>() {
        Ok(value) if value <= 100 => Ok(value),
        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)
}

Ari Karim

arikarim

a month ago

4.80ms

87.95kb

use std::{ error::Error, fmt::Formatter};
#[derive(Debug, PartialEq, Eq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid Input."),
            ParsePercentageError::OutOfRange => write!(f, "Percentage is out of range (0-100)")
        }
     }
}
impl Error for ParsePercentageError {
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let num: u8 = input.parse().map_err(|_| ParsePercentageError::InvalidInput)?;
    if num <= 100 {
        Ok(num)
    } 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)
}

Dr. Frederik Lauber

FrederikLauber

a month ago

3.89ms

87.95kb

use std::error::Error;
use core::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, "ParsePercentageError::InvalidInput"),
            ParsePercentageError::OutOfRange => write!(f, "ParsePercentageError::OutOfRange")
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let number = input.parse::<u8>().map_err(|_| ParsePercentageError::InvalidInput)?;
    if number > 100 {
        return Err(ParsePercentageError::OutOfRange);
    }
    Ok(number)
}
// 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)
}

Yummy-Yums

a month ago

7.05ms

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 {
        let out = match self {
            ParsePercentageError::InvalidInput =>  "Input is not a valid number",
            ParsePercentageError::OutOfRange => "Number is out of range (0-100)",
        };
        
        write!(f, "{:?}", out)
    }
}
impl 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),
        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)
}

Yummy-Yums

a month ago

33.01ms

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, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Number is out of range (0-100)"),
        }
    }
}
impl 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),
        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)
}

Asrul Firdaus

AsrulF

a month ago

4.20ms

87.95kb

use std::{error::Error, fmt::Display, num::IntErrorKind};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => writeln!(f, "Input cannot be parsed"),
            ParsePercentageError::OutOfRange => writeln!(f, "Number not in range, 0 - 100"),
        }
    }
}
impl 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 => Err(ParsePercentageError::OutOfRange),
        Ok(num) => Ok(num),
        Err(e) if *e.kind() == IntErrorKind::InvalidDigit => Err(ParsePercentageError::InvalidInput),
        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)
}

0xdangit

a month ago

3.80ms

87.95kb

use std::error::Error;
use std::fmt::{Display, Formatter};
// 1. Finish the definition
#[derive(Debug, Eq, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        let output = match *self {
            ParsePercentageError::InvalidInput => "Input is not a valid number",
            ParsePercentageError::OutOfRange => "Number is not in the range 0-100"
        };
        write!(f, "{:?}", output)
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) if value <= 100 => Ok(value),
        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)
}

0xdangit

a month ago

5.37ms

87.95kb

use std::error::Error;
use std::fmt::{Display, Formatter};
// 1. Finish the definition
#[derive(Debug, Eq, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        let output = match *self {
            ParsePercentageError::InvalidInput => "Input is not a valid number",
            ParsePercentageError::OutOfRange => "Number is not in the range 0-100"
        };
        write!(f, "{:?}", output)
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) => {
            if value <= 100 {
                return Ok(value);
            }
            return Err(ParsePercentageError::OutOfRange);
        },
        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)
}

Léa Narzis

lean-apple

a month ago

4.10ms

87.95kb

use std::fmt::{self, Display};
use std::error::Error;
#[derive(Debug, PartialEq, Eq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput
}
// 2. Implement the `Error` trait
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::OutOfRange => write!(f, "number out of range, should be between 0 and 100"),
            Self::InvalidInput => write!(f, "invalid input")
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(value) if value <=100 => Ok(value),
        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)
}

Léa Narzis

lean-apple

a month ago

3.99ms

87.95kb

use std::fmt::{self, Display};
use std::error::Error;
#[derive(Debug, PartialEq, Eq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput
}
// 2. Implement the `Error` trait
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::OutOfRange => write!(f, "number out of range, should be between 0 and 100"),
            ParsePercentageError::InvalidInput => write!(f, "invalid input")
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let result = input.parse::<u8>();
    match result {
        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)
}

Zisraw

a month ago

4.36ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq, Eq)]
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 format"),
            ParsePercentageError::OutOfRange => write!(f, "Input out of range"),
        }
    }
}
impl 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(num) => {
            match num <= 100 {
                true => Ok(num),
                false => 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)
}

Yashwanth

Yash981

a month ago

3.78ms

87.95kb

use std::error::Error;
use std::fmt;
use std::fmt::{Display,Formatter};
// 1. Finish the definition
#[derive(Debug,PartialEq,Eq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input: not a number"),
            ParsePercentageError::OutOfRange => write!(f, "Out of range: must be 0 to 100"),
        }
    }
}
impl 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(num) => {
            match num <= 100 {
                true => Ok(num),
                false => 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)
}