Pattern matching within Rust functions for type-safe APIs - Learn Rust Creatively
Let's explain a hidden feature of Rust's function signatures - the ability to specify arbitrary patterns where you would normally see a parameter's name. this is used in the Axum web framework, and arguably it should be more common.
The second half of this video gets fairly dense quite quickly.
Highlights
Explaining path(Path(user_id): Path[u32]) - 04:00 (replace [] with angle brackets)
What str means: 16:55
What ?Sized means: 18:35
Chapters
00:00:00 Introduction
00:01:31 Expaining the problem - Axum's confusing syntax with extractors
00:03:40 Path extractor example
00:05:10 General purpose pattern matching in functions
00:06:00 Rust Reference: Functions
00:07:23 Motivating the syntax - destructuring Price(f32)
00:11:06 Destructuring a struct with named fields
00:15:10 Introducing the Deref trait
00:15:44 Call methods on str from String and str thanks to Deref
00:18:11 Implementing Deref
00:22:08 Mixing Deref and std::ops:Add
00:27:23 Summary and wrap up
📚 Resources:
Rust reference on patterns: https://doc.rust-lang.org/reference/p...
Axum
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