Notes for book of Effective Rust

notes rust

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Mutual error types

If you want to mutually create a error type, some trait should be implemented by yourself.

Effective Rust, page 34

Enum type to represent multi errors

Effective Rust, page 35

Effective Rust, page 37

If you want to implement the different upstream errors to concrate MyError, a fair amount of boilerplate should be added. But the crate of thiserror solves this.

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The methods for Result or Option

The syntactic surgar of ?

But explicitly convertion may be not necessary if the external error has implemented the From trait for the internal Error type.

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Closures catch external variant

The difference with function and method

What’s the meaning of self or &self or &mut self