Mykhailo Maidan
Crafting Custom Frameworks with Rust: A Deep Dive into Procedural Macros
#1about 7 minutes
Exploring the power and pitfalls of Rust macros
Rust's metaprogramming capabilities allow for reducing boilerplate code, but macros can be complex to write, debug, and test.
#2about 6 minutes
Simplifying event handlers with custom attribute macros
An event-driven framework's API can be significantly simplified by using attribute macros to define event handlers and their corresponding events.
#3about 7 minutes
Overcoming unordered macro expansion with build-time metadata
To solve the problem of unordered macro expansion, a build script (`build.rs`) can analyze the source code and generate a metadata file before compilation.
#4about 8 minutes
Parsing crate source code with the `syn` crate
The `syn` and `syn-inline-mod` crates enable parsing an entire Rust crate into a single Abstract Syntax Tree (AST), which can then be analyzed using the visitor pattern.
#5about 5 minutes
Loading metadata and modifying the AST in macros
Procedural macros can load the pre-generated metadata from disk and use the `VisitMut` trait from `syn` to modify the AST, such as renaming functions to simulate overloading.
#6about 8 minutes
Evaluating the trade-offs of a metadata-driven macro framework
While this metadata-driven approach offers powerful compile-time checks and extensibility for tooling, it increases build times and implementation complexity.
#7about 12 minutes
Q&A on testing, nightly Rust, and framework design
The discussion covers practical considerations like the necessity of nightly Rust for certain features, strategies for testing complex macros, and potential runtime optimizations.
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