The Rust Borrow Checker: A Deep Dive
summary
Explains how the compiler lowers source via HIR to MIR and runs the borrow checker during semantic analysis, where it tracks initializations and moves and rejects use-after-move errors; shows a concrete example where moving a String into y makes x uninitialized, then switching to a reference prints "hi rustlab" twice; describes lifetime inference, how borrows must not outlive owners, and that the checker shows source spans and actionable suggestions and integrates with cargo/LLVM.
AI-written summary · about
chapters (16)
- 0:00Start
- 1:41Who I Am
- 2:15Background on the Rust Compiler
- 3:14General Stages to Compiling a Piece of Code
- 4:32Lexical Analysis
- 4:52Parsing
- 6:46Data Structures
- 11:35The Rust Compiler Semantic Analysis
- 14:27How the Borrow Checker Identified this Error
- 17:55Lifetime Inference
- 21:27Is the Borrow Checker a Friend or a Foe
- 22:21Qa
- 22:53How Do I Get Started Contributing to the Compiler
- 24:25What Do You Think about the Current Attempt To Leverage Gcc To Compile Rust
- 25:09Do You Believe the Example of the Rust Borrow Checker Will Inspire Other Existing Languages Maybe Even Dynamically Typed or Interpreted
- 28:30Are There Resources You Would Recommend or Reports with Examples for More Complex Scenarios To Better Understand Borrowing and Related Issues
related talks
22mThe Rust Borrow Checker - A Deep Dive
53mThe Rust Borrow Checker - A Deep Dive
50mRust's Borrow Checker Proven Correct!
05mEmulating Rust's Borrow Checker in C++
27mHow Rust taught me to think about systems
40mBorrowSanitizer: Securing Rust Across Foreign Function Boundaries
26mThe first six years in the development of Polonius
37mCompiler Errors in rustc: A UX Perspective