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

bernardoLY19

9 hours ago

3.43ms

87.95kb

use std::error::Error;
use std::fmt::{self, Display, Formatter};
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of allowed range (0-100)"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse() {
        Ok(101..) => Err(ParsePercentageError::OutOfRange),
        Ok(i) => Ok(i),
        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)
}

Miguel Ángel Allende

maallende

2 days ago

3.68ms

87.95kb

use std::{error::Error, fmt::{self, Display}};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{:?}", self)        
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // TODO: Implement the function here
    input.parse::<u32>()
        .map_err(|_| ParsePercentageError::InvalidInput)
        .and_then(|num| {
            if num <= 100 {
                Ok(num as u8)
            } 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)
}

Baron Curtin

baroncurtin2

2 days ago

4.50ms

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 Error for ParsePercentageError {}
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> {
    // 3. Implement this function
    let number = input.trim().parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)?;
    if number > 100 {
        Err(ParsePercentageError::OutOfRange)
    } else {
        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)
}

medzernik

2 days ago

4.62ms

87.95kb

use std::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(Debug, Eq, PartialEq)]
pub enum ParsePercentageError{
    InvalidInput,
    OutOfRange
}
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse().map_err(|_|ParsePercentageError::InvalidInput)? { 
        val @ 0..=100 => Ok(val),
        _ => 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)
}

Cobran53

3 days ago

4.90ms

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 {
        // Écrit la sortie formatée dans le formateur
        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
    match input.parse::<u8>() {
        Err(_) => Err(ParsePercentageError::InvalidInput),
        Ok(101..) => Err(ParsePercentageError::OutOfRange),
        Ok(i) => Ok(i)
    }
}
// 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)
}

silaskoemen

5 days ago

3.32ms

87.95kb

use std::{error::Error, 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"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) => { 
            if n <= 100 {
                Ok(n)
            }
            else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

silaskoemen

5 days ago

4.02ms

87.95kb

use std::{error::Error, 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"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) => { 
            if n <= 100 {
                Ok(n)
            }
            else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Kr0wZ

5 days ago

3.51ms

87.95kb

use std::error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Error` trait
impl 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, "Out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    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)
}

alexsavio

6 days ago

3.28ms

87.95kb

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

coreyralph

7 days ago

4.03ms

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 {
        write!(f, "ParsePercentageError")
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse() {
        Err(_) => Err(ParsePercentageError::InvalidInput),
        Ok(101..) => Err(ParsePercentageError::OutOfRange),
        Ok(i) => Ok(i)
    }
}
// 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)
}

Smith Cruise

Smith-Cruise

8 days ago

3.46ms

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 {
        format!("{:?}", self).fmt(f)
    }
}
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 res: Result<u8, _> = input.parse();
    match res { 
        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)
}

Herman effendi

hrmneffdii

8 days ago

3.56ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq, Eq)] // <== Tambahkan ini
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Display` 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, "Percentage out of range"),
        }
    }
}
// 3. Implement the `Error` trait
impl Error for ParsePercentageError {}
// 4. Main function
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) if n <= 100 => Ok(n),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// 5. Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Err(OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Err(InvalidInput)
}

Herman effendi

hrmneffdii

8 days ago

3.62ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq, Eq)] // <== Tambahkan ini
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
// 2. Implement the `Display` 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, "Percentage out of range"),
        }
    }
}
// 3. Implement the `Error` trait
impl Error for ParsePercentageError {}
// 4. Main function
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) if n <= 100 => Ok(n),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// 5. Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Err(OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Err(InvalidInput)
}

Rocky.C

cloki0610

8 days ago

3.25ms

87.95kb

// 1. Finish the definition
#[derive(Debug,PartialEq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput,
}
// 2. Implement the `Error` trait
impl std::fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::InvalidInput => write!(f,"invalid input provided"),
            Self::OutOfRange => write!(f,"input out of range"),
        }
    }
}
impl std::error::Error for ParsePercentageError{}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    return match input.parse::<u8>() {
        Ok(t) if t <= 100 => Ok(t),
        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)
}

Ushakov Andrey

stdstring

9 days ago

3.31ms

87.95kb

use std::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(Debug)]
#[derive(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)"),
        }
    }
}
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::<i32>() {
        Err(_) => Err(ParsePercentageError::InvalidInput),
        Ok(value) if ((value < 0) | (value > 100)) => Err(ParsePercentageError::OutOfRange),
        Ok(value) => Ok(value 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)
}

vanos001

9 days ago

3.94ms

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 {
        match self {
            Self::InvalidInput => write!(f,"invalid input provided"),
            Self::OutOfRange => write!(f,"input out of range"),
        }
    }
}
impl std::error::Error for ParsePercentageError{}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    return match input.parse::<u8>() {
        Ok(t) if t <= 100 => Ok(t),
        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)
}

AtlasVakyrie

10 days ago

3.62ms

87.95kb

use std::fmt;
use std::error::Error;
// 1. Finish the definition
#[derive(Debug, Clone, 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, "Out of range."),
            ParsePercentageError::OutOfRange => write!(f, "Invalid Output."),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    let percent = input.parse::<u8>();
    match percent {
        Ok(p) if p <= 100 => Ok(p), 
        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)
}

Philippe Massicotte

PMassicotte

10 days ago

3.38ms

87.95kb

use std::error::Error;
// 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, "Error ParsePercentageError"),
            ParsePercentageError::OutOfRange => write!(f, "Error out of range"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        Ok(n) if n <= 100 => Ok(n),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        _ => Err(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)
}

Tri Nguyen

nguyentri

10 days ago

3.44ms

87.95kb

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

Enes

enesscevik

13 days ago

3.43ms

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

Christopher Kolbe

chkolbe

14 days ago

3.57ms

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::OutOfRange => write!(f, "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> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(value) => {
            if value > 100 {
                Err(ParsePercentageError::OutOfRange)
            } else {
                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)
}

Luigi Terrone

LuigiTer

14 days ago

3.43ms

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, "Invalid input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(value) => {
            if value <= 100 {
                Ok(value)
            } else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        Err(_) => Err(ParsePercentageError::InvalidInput),
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

0x0f1

Paul4673

14 days ago

3.51ms

87.95kb

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

Heino Mortensen

hmortensen83

15 days ago

4.47ms

87.95kb

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

esl

esl07

16 days ago

3.44ms

87.95kb

use std::error::Error;
use std::fmt::Display;
#[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 {
        todo!()
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let number = input
        .parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)?;
    match number {
        0..=100 => Ok(number),
        _ => 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)
}

xxxxsk

17 days ago

3.60ms

87.95kb

// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput
}
// 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::OutOfRange => write!(f, "Value out of range"),
            ParsePercentageError::InvalidInput => write!(f, "Invalid input"),
        }
    }
}
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)
}

Pierre Gordo

PierreGordo

18 days ago

3.37ms

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, "Invalid Input"),
            ParsePercentageError::OutOfRange => write!(f, "Out of"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>(){
        //Don't have to compare if it is less than 0 because it is 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)
}

hahu07

19 days ago

3.98ms

87.95kb

use std::error::Error;
use std::fmt;
use std::str::FromStr;
// 1. Finish the definition
#[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 value is out of the range"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match i32::from_str(input) {
        Ok(n) if n >= 0 && n <= 100 => Ok(n 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)
}

ikatlinsky

24 days ago

6.13ms

87.95kb

use std::error::Error;
use std::fmt;
use std::str::FromStr;
// 1. Finish the definition
#[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 value is out of the range"),
        }
    }
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match i32::from_str(input) {
        Ok(n) if n >= 0 && n <= 100 => Ok(n 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)
}

0x90

riccio8

25 days ago

3.50ms

87.95kb

use std::{error::Error, fmt::Display, };
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 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"),
        }
        
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    input
        .parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)
        .and_then(|num| {
            if num > 100 || num < 0{
                Err(ParsePercentageError::OutOfRange)
            }else{
                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)
}

diucicd

a month ago

4.21ms

87.95kb

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

Sergey Matyash

matiaspub

a month ago

3.53ms

87.95kb

use std::error::Error;
use std::fmt::{Display};
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    OutOfRange,
    InvalidInput,
}
// 2. Implement the `Error` trait
impl Error for ParsePercentageError {}
impl Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", dbg!(self))
    }
}
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)
}

GregGorin

a month ago

3.75ms

87.95kb

use std::error::Error;
use std::fmt::{self, Debug};
#[derive(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, "ParsePercentageError::OutOfRange")},
            ParsePercentageError::InvalidInput => {write!(f, "ParsePercentageError::InvalidInput")}, 
        }       
    }
}
impl Debug for ParsePercentageError{
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{self}")      
    }
}
impl Error for ParsePercentageError{}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    match input.parse::<u8>() {
        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)
}

annececiledunand

a month ago

3.51ms

87.95kb

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

annececiledunand

a month ago

4.38ms

87.95kb

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

Ajit Kumar

urwithajit9

a month ago

4.13ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError{
 InvalidInput,
 OutOfRange,
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input: not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Value out of range: must be between 0 and 100"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    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)
}

Maicon Crespo

maiconcrespo

a month ago

3.40ms

87.95kb

// 1. Finish the definition
use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError{
 InvalidInput,
 OutOfRange,
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "Invalid input: not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "Value out of range: must be between 0 and 100"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    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)
}

LeonardoPinheiro23

a month ago

4.08ms

87.95kb

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

wry

Liudel

a month ago

4.33ms

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 Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "InvalidInput"),
            Self::OutOfRange => write!(f, "OutOfRange"),
        }
    }
}
impl Error for ParsePercentageError {}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(n @ 0..=100) => Ok(n),
        Ok(_) => Err(ParsePercentageError::OutOfRange),
        Err(_) => 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)
}

Kenas Zogara

kenaszogara

a month ago

3.61ms

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 {
            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
    let number = match input.parse::<u8>() {
        Ok(number) => number,
        Err(_e) => return 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)
}

jbrakmic

a month ago

4.01ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl fmt::Display for ParsePercentageError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Invalid input"),
            Self::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
    let res: u8 = input.parse().map_err(|_| ParsePercentageError::InvalidInput)?;
    if res > 100  {
        return Err(ParsePercentageError::OutOfRange);
    }
    Ok(res)
}
// 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)
}

Tengz Mao

MaoX-Yu

a month ago

3.79ms

87.95kb

use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange,
}
impl fmt::Display for ParsePercentageError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::InvalidInput => write!(f, "Invalid input"),
            Self::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
    input.parse::<u8>()
        .map_err(|_| ParsePercentageError::InvalidInput)
        .and_then(|n| {
            (n <= 100)
                .then_some(n)
                .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)
}

Tommytto

a month ago

6.34ms

87.95kb

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

Travis

ttmgraham

a month ago

6.46ms

87.95kb

use std::error::Error;
use std::fmt;
// 1. Finish the definition
#[derive(Debug, PartialEq)]
pub enum ParsePercentageError {
    InvalidInput,
    OutOfRange
}
// 2. Implement the `Error` trait
impl fmt::Display for ParsePercentageError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            ParsePercentageError::InvalidInput => write!(f, "The input is not a valid number"),
            ParsePercentageError::OutOfRange => write!(f, "The value is outside 0 - 100")
        }
    }
}
impl Error for ParsePercentageError { }
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)
}

Erik Hollembeak

futureperfect

a month ago

4.71ms

87.95kb

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

Joerg Schad

joerg84

a month ago

5.24ms

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

Joerg Schad

joerg84

a month ago

5.34ms

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

sjmellor

a month ago

4.27ms

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 {
        let err_msg = match self {
            ParsePercentageError::InvalidInput => "ParsePercentageError::InvalidInput",
            ParsePercentageError::OutOfRange => "ParsePercentageError::OutOfRange",
        };
        write!(f, "{}", err_msg)
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    // 3. Implement this function
    match input.parse::<u8>() {
        Ok(percentage) => {
            if percentage <= 100 {
                Ok(percentage)
            }
            else {
                Err(ParsePercentageError::OutOfRange)
            }
        },
        _ => Err(ParsePercentageError::InvalidInput)
    }
}
// Example usage
pub fn main() {
    let result = parse_percentage("50");
    println!("{:?}", result); // Should print: Ok(50)
    let result = parse_percentage("101");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::OutOfRange)
    let result = parse_percentage("abc");
    println!("{:?}", result); // Should print: Err(ParsePercentageError::InvalidInput)
}

Augsorn Chanklad

up2code

a month ago

3.58ms

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

Zeno

djeanql

a month ago

3.53ms

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 input"),
            ParsePercentageError::OutOfRange => write!(f, "Percentage out of range"),
        }
    }
}
pub fn parse_percentage(input: &str) -> Result<u8, ParsePercentageError> {
    let result = input.parse::<u8>();
    match result {
        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)
}