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36 lines
771 B
Rust
36 lines
771 B
Rust
// ./src/error/result/early_returns.md
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use std::num::ParseIntError;
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fn multiply(first_number_str: &str, second_number_str: &str) -> Result<i32, ParseIntError> {
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let first_number = match first_number_str.parse::<i32>() {
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Ok(first_number) => first_number,
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Err(e) => return Err(e),
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};
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let second_number = match second_number_str.parse::<i32>() {
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Ok(second_number) => second_number,
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Err(e) => return Err(e),
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};
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Ok(first_number * second_number)
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}
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fn print(result: Result<i32, ParseIntError>) {
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match result {
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Ok(n) => println!("n is {}", n),
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Err(e) => println!("Error: {}", e),
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}
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}
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fn part0() {
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print(multiply("10", "2"));
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print(multiply("t", "2"));
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}
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pub fn main() {
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part0();
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}
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