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

Pranav Garg

PranavGarg01

a day ago

3.37ms

87.95kb

// 1. Finish the definition
use std::fmt::{Display, Formatter};
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::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> {
    // 3. Implement this function
    let x = input.parse::<u8>();
    if x.is_err() {
        return Err(ParsePercentageError::InvalidInput);
    }
    if x.clone().unwrap() > 100 {
        return Err(ParsePercentageError::OutOfRange);
    }
    return Ok(x.clone().unwrap());
}
// 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)
}

amaneru

7ma8no9

3 days ago

8.81ms

87.95kb

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

Sandeep chauhan

ryzen-xp

4 days ago

4.43ms

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

AKA.MoneyTaker

M4Bo2

5 days ago

5.26ms

87.95kb

use std::fmt;
// 1. Define the ParsePercentageError enum
#[derive(Debug,PartialEq )]
pub enum ParsePercentageError {
    InvalidInput, // For inputs that cannot be parsed as numbers
    OutOfRange,  // For numbers that are not in the range 0-100
}
// 2. Implement the `Error` trait 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"),
        }
    }
}
impl std::error::Error for ParsePercentageError {}
// 3. Update the parse_percentage function
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // Try to parse the input string into a u8
    let number: u8 = input
        .parse()
        .map_err(|_| ParsePercentageError::InvalidInput)?;
    // Check if the number is within the valid range (0-100)
    if number > 100 {
        return Err(ParsePercentageError::OutOfRange);
    }
    Ok(number) // Return the parsed percentage if it's valid
}
// 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)
}

Zenya Nagata

zenyanagata

6 days ago

5.27ms

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

Dyaa Adel

dyaa-adel

7 days ago

3.25ms

87.95kb

use std::fmt::{Display , Debug , Formatter};
use std::fmt;
// 1. Finish the definition
#[derive(Debug)]
#[derive(PartialEq)]
pub enum ParsePercentageError { OutOfRange, InvalidInput}
// 2. Implement the `Error` trait
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage must be between 0 and 100"),
        }
    }
}
impl std::error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(val) => {
            if val > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            return Ok(val);
        }
        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)
}

Lê Minh Quân

aleister1102

8 days ago

3.47ms

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

Anıl Şenay

anilsenay

9 days ago

3.32ms

87.95kb


#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
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, "invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "number is out of range"),
        }
    }
}
// 2. Implement the `Error` trait
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let num = input
        .parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)?;
    match num <= 100 {
        true => Ok(num),
        false => 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)
}

TiagONTOP

9 days ago

4.35ms

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, "Invalid Input"),
            ParsePercentageError::OutOfRange => write!(f, "Out Of Range")
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let input_int: Result<u8, _> = input.parse();
    match input_int {
        Ok(res) if res <= 100 => Ok(res as u8),
        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)
}

Guilherme Cesário Strachan

strachan

9 days ago

3.66ms

87.95kb

use std::fmt::Display;
// 1. Finish the definition
#[derive(Debug)]
#[derive(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 is out of range"),
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
        }
    }
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // Implement here
    match input.parse::<u8>() {
        Ok(num) => {
            if num > 100 {
                Err(ParsePercentageError::OutOfRange)
            } else {
                Ok(num)
            }
        }
        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)
}

Yi Hao

leongyihao

9 days ago

4.77ms

87.95kb

#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
	InvalidInput,
	OutOfRange
}
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, "not an integer"),
			ParsePercentageError::OutOfRange => write!(f, "must be 0 to 100")
		}
	}
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
	let Ok(num) = input.trim().parse::<u8>() else {
		return Err(ParsePercentageError::InvalidInput)
	};
	if num <=100 {
		Ok(num)
	}
	else {
		Err(ParsePercentageError::OutOfRange)
	}
}

Prafful

iamsahu

10 days ago

4.08ms

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 {
        let output = match self {
            Self::InvalidInput => "not a valid number",
            Self::OutOfRange => "not a valid percentage"
        };
        write!(f, "{}", output)
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    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)
}

Ayushman Rathore

Spartan09

11 days ago

5.14ms

87.95kb

use std::fmt;
use std::error;
// 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 {
        let output = match self {
            Self::InvalidInput => "not a valid number",
            Self::OutOfRange => "not a valid percentage"
        };
        write!(f, "{}", output)
    }
}
// 2. Implement the `Error` trait
impl error::Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) if (0..=100).contains(&n) => 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)
}

Benjamin Falk

lumio

11 days ago

3.72ms

87.95kb

use std::error::Error;
use std::fmt::{self, Display};
#[derive(Debug,PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Error for ParsePercentageError {}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let output = match self {
            Self::InvalidInput => "InvalidInput",
            Self::OutOfRange => "OutOfRange",
        };
        write!(f, "{}", output)
    }
}
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)
}

norabbito

11 days ago

9.78ms

87.95kb

use std::{error::Error, fmt};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
//
// Ok how the hell am I supporsed to know all of this.
impl Error for ParsePercentageError {}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "oopsie")
    }
}
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)
}

Jordan

Jordan-Haidee

13 days ago

3.53ms

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, "InvalidInput"),
            ParsePercentageError::OutOfRange => write!(f, "OutOfRange"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    if let Ok(v) = input.parse::<u8>() {
        if v <= 100 {
            Ok(v)
        } 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)
}

Jordan

Jordan-Haidee

13 days ago

3.72ms

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, "InvalidInput"),
            ParsePercentageError::OutOfRange => write!(f, "OutOfRange"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    if let Ok(v) = input.parse::<u8>() {
        if v <= 100 {
            Ok(v)
        } 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)
}

Diego Maia

diegocmsantos

13 days ago

3.33ms

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 {
        write!(f, "Oh no, something bad went down")
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(0..=100) => Ok(input.parse().unwrap()),
        Ok(x) if !(0..=100).contains(&x) => 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)
}

Kyle Diaz

kylediaz

14 days ago

3.29ms

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<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "InvalidInput"),
            ParsePercentageError::OutOfRange => write!(f, "OutOfRange"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(v) if v <= 100 => Ok(v),
        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)
}

tzmijewski

15 days ago

4.24ms

87.95kb

use std::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError{
    OutOfRange,
    InvalidInput
}
// 2. Implement the `Error` trait
impl std::error::Error for ParsePercentageError {}
/* 
impl Error for ParsePercentageError {
   
   fn provide<'a>(&'a self, request: &mut Request<'a>) {
        request
            .provide_ref::<MyBacktrace>(&self.backtrace);
    }
    fn provide<'a>(&'a self, request: &mut Request<'a>) {
        request
            .provide_ref::<ParsePercentageError>(&self);
    }
}  */
impl fmt::Display for ParsePercentageError {
    
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        // Use `self.number` to refer to each positional data point.
        write!(f, "{}", self)
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let number: Option<u8> = input.trim().parse().ok();
    match number {
        Some(num) => {
            if num <= 100 {
                Ok(num)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        None => 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)
}

Christopher Nielson

c-nielson

15 days ago

3.34ms

87.95kb

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

Christopher Nielson

c-nielson

15 days ago

3.97ms

87.95kb

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

Kenneth Love

kennethlove

16 days ago

3.67ms

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 {
            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(num) => {
            if (0..=100).contains(&num) {
                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)
}

Suraj Vijayan

its-me-sv

17 days ago

3.51ms

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 {
            ParsePercentageError::InvalidInput => {
                write!(f, "Err(ParsePercentageError::InvalidInput)")
            }
            ParsePercentageError::OutOfRange => write!(f, "Err(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
    input
        .parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)
        .and_then(|x| {
            (0..=100)
                .contains(&x)
                .then_some(x)
                .ok_or(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)
}

Donald Huber-Youmans

dHuberYoumans

17 days ago

3.67ms

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,"Input out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Err(_) => Err(ParsePercentageError::InvalidInput),
        Ok(num) if num > 100 => Err(ParsePercentageError::OutOfRange),
        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)
}

ludovicknecht

17 days ago

3.68ms

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

Muhammad-Dennis

18 days ago

3.29ms

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 {
            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
    if let Ok(result) = input.parse::<u8>() {
        if result > 100 || result < 0 {
            return Err(ParsePercentageError::OutOfRange)
        } else {
            return Ok(result)
        }
    } else {
        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)
}

alemack17

19 days ago

4.87ms

87.95kb


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 std::error::Error for ParsePercentageError{}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let num:i32=input.parse().map_err(|_| ParsePercentageError::InvalidInput)?;
    if num>100 || num<0{
        return Err(ParsePercentageError::OutOfRange);
    }
    return Ok(num 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)
}

Whisper_icoma

1378046967

19 days ago

3.41ms

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, "invalid number."),
            ParsePercentageError::OutOfRange => write!(f, "Out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>(){
        Ok(number) if number > 100  => Err(ParsePercentageError::OutOfRange),
        Ok(number) => Ok(number),
        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)
}

manuelmj

19 days ago

4.72ms

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, "invalid number."),
            ParsePercentageError::OutOfRange => write!(f, "Out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>(){
        Ok(number) if number > 100  => Err(ParsePercentageError::OutOfRange),
        Ok(number) => Ok(number),
        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)
}

manuelmj

19 days ago

3.74ms

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 allowed range (0-100)."),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>(){
        Ok(number) if number > 100  => Err(ParsePercentageError::OutOfRange),
        Ok(number) => Ok(number),
        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)
}

manuelmj

19 days ago

3.23ms

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 allowed range (0-100)."),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>(){
        Ok(number) if number > 100  => Err(ParsePercentageError::OutOfRange),
        Ok(number) => Ok(number),
        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)
}

Suresh Prajapati

toddlers

19 days ago

3.96ms

87.95kb

use std::{error::Error, fmt};
// 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{
        write!(f, "Error")
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    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)
}

Suresh Prajapati

toddlers

19 days ago

4.32ms

87.95kb

use std::{error::Error, fmt};
// 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{
        write!(f, "Error")
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    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)
}

RiyadDz22

19 days ago

13.64ms

87.53kb

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 {
    fn description(&self) -> &str {
        match self {
            ParsePercentageError::InvalidInput => {
                return "Invalid input."
            }
            ParsePercentageError::OutOfRange => {
                return "Out of range."
            }
        }
    }
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let percentage: Result<u8, _> = input.parse();
    println!("parse_percentage: {:?}", percentage);
    match percentage {
        Ok(pct) => {
            if pct > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            return Ok(pct);
        }
        Err(_e) => {
            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)
}

kosay

sarub0b0

20 days ago

5.42ms

87.95kb

#[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, "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(value @ 0..=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)
}

automata-studio

20 days ago

3.90ms

87.95kb

use std::{error::Error, fmt};
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Error for ParsePercentageError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        None
    }
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "Error")
    }
}
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),
    }
}
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)
}

Denis SOURON

Brack0

20 days ago

4.50ms

87.95kb

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, "Invalid input or percentage out of range")
    }
}
impl Error for ParsePercentageError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        None
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let percentage = input.parse::<u8>();
    match percentage {
        Err(_) => Err(ParsePercentageError::InvalidInput),
        Ok(percentage) if percentage > 100 => Err(ParsePercentageError::OutOfRange),
        Ok(percentage) => Ok(percentage),
    }
}

TeDeMos

21 days ago

3.51ms

87.95kb

use std::fmt::{self, Display, Formatter};
use std::error::Error;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        match self {
            Self::InvalidInput => f.write_str("Invalid input"),
            Self::OutOfRange => f.write_str("Input out of range"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse() {
        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)
}

Romain Grimau

Herrgrim0

21 days ago

3.33ms

87.95kb

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

iamforgettable

21 days ago

10.28ms

87.95kb

use core::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(Debug)]
#[derive(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 {
        write!(f, "WFT")
    }
}
impl Error for ParsePercentageError {
    
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let value = input.parse::<u8>();
    match value {
        Ok(0..=100) => Ok(value.unwrap()),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
    
}
// Example usage
pub fn main() {
    assert_eq!(parse_percentage("75"), Ok(75));
    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)
}

Jun Huang

leemars

22 days ago

7.92ms

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 {
        write!(f, "")
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    if let Ok(value) = input.parse::<u8>() {
        if 0 <= value && value <= 100 {
            Ok(value)
        } 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)
}

Nikita Smirnov

Nismirno

22 days ago

3.61ms

87.95kb

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

Viktor Merkurev

fennr

22 days ago

3.47ms

87.95kb

use core::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, fmt: &mut fmt::Formatter) -> fmt::Result {
        write!(fmt, "{}", self)
    }
}
impl Error for ParsePercentageError {
    fn description(&self) -> &str {
        match self {
            ParsePercentageError::InvalidInput => "Invalid input",
            ParsePercentageError::OutOfRange => "Percentage out of range",
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<i32>() {
        Ok(percent) => {
            if percent < 0 || percent > 100 {
                Err(ParsePercentageError::OutOfRange)
            } else {
                Ok(percent as u8)
            }
        }
        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)
}

Elliott Draper

ejdraper

23 days ago

4.43ms

87.53kb

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 {
    fn description(&self) -> &str {
        match self {
            ParsePercentageError::InvalidInput => {
                return "Invalid input."
            }
            ParsePercentageError::OutOfRange => {
                return "Out of range."
            }
        }
    }
}
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let percentage: Result<u8, _> = input.parse();
    println!("parse_percentage: {:?}", percentage);
    match percentage {
        Ok(pct) => {
            if pct > 100 {
                return Err(ParsePercentageError::OutOfRange);
            }
            return Ok(pct);
        }
        Err(_e) => {
            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)
}

rawar089

23 days ago

4.20ms

87.95kb

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 std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Err(ParsePercentageError::InvalidInput)"),
            Self::OutOfRange => write!(f, "Err(ParsePercentageError::OutOfRange)"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse() {
       Ok(n)  if n <= 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)
}

Algorab

23 days ago

7.88ms

87.95kb

use std::fmt::{Debug, Display, Formatter};
// 1. Finish the definition
#[derive(PartialEq, Debug)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => {
                write!(f, "Invalid input provided")
            }
            ParsePercentageError::OutOfRange => {
                write!(f, "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 (0..=100).contains(&num) {
                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)
}

Kentaro Abe

abekem

23 days ago

4.81ms

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<'_>) -> Result<(), fmt::Error> {
        match self {
            Self::InvalidInput => write!(f, "{}", "Invalid input"),
            Self::OutOfRange => write!(f, "{}", "Out of range"),
        }
    }
}
impl Error for ParsePercentageError {
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse() {
        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)
}

Illus1on

hjklchan

24 days ago

6.49ms

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 {
        write!(f, "{}", self.error_message())
    }
}
impl ParsePercentageError {
    pub fn error_message(&self) -> &str {
        match self {
            Self::InvalidInput => "Invalid input.",
            Self::OutOfRange => "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
    let untrusted_input = input.parse::<u8>();
    match untrusted_input {
        Ok(number) => {
            if (0..=100).contains(&number) {
                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)
}

Simon Noetzlin

sainoe

24 days ago

4.01ms

87.95kb

use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq, Eq)]
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 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)
}