ere: Compiling Regular Expressions at Build-Time With Proc Macros

Learn how to compile regular expressions at build-time using Rust's proc-macro system in this 48-minute conference talk from the Seattle Rust User Group. Discover an innovative approach that moves beyond traditional runtime compilation of regular expressions into data structures by leveraging Rust's powerful macro system to compile regex patterns directly into equivalent Rust code during the build process. Explore how this technique not only improves performance by eliminating runtime compilation overhead but also harnesses Rust's type system to provide ergonomic representation of capture group semantics based on the regular expression's structure. Gain insights into the 'ere' project implementation, understand the technical challenges of build-time regex compilation, and see practical examples of how proc macros can transform regex patterns into type-safe, compile-time verified code that maintains the expressiveness of traditional regular expressions while offering superior performance characteristics.