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566 B
566 B
Propagating Errors and ? Operator
Propagating errors in Rust is about passing the error information from the function that failed to the function that called it. Using the ? operator is one way to achieve this. This operator can only be used in functions that return Result or Option or another type that implements std::ops::Try. If the value of the Result is Ok, the value inside the Ok will get returned. If the value is Err, the Err will be returned from the whole function. Consequently, the error gets propagated to the calling function.