The article demonstrates a toy language that implements borrow-checking through dynamic runtime enforcement rather than static type-checking. Drawing on patterns from Julia and Zig, it supports explicit switching between dynamically-typed (interpreted) and statically-typed (compiled) modes, achieving memory safety with the flexibility needed for REPLs and live code reloading.
Research
Borrow-checking without type-checking
A toy language achieves Rust's borrow-checking guarantees at runtime instead of compile-time, enabling memory safety in dynamic, interpreted code without sacrificing REPL flexibility.
Thursday, April 23, 2026 12:00 PM UTC2 MIN READSOURCE: LobstersBY sys://pipeline
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