Software Development Team (soft-dev)

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Garbage collection for Rust: The finalizer frontier

2025144 points180 comments Programming Languages details

Abstract Rust is a non-Garbage Collected (GCed) language, but the lack of GC makes expressing data-structures that require shared ownership awkward, inefficient, or both. In this paper we explore a new design for, and implementation of, GC in Rust, called Alloy . Unlike previous approaches to GC in Rust, Alloy allows…

Don't Panic! Better, Fewer, Syntax Errors for LR Parsers

2020114 points39 comments Programming Languages details

Abstract Syntax errors are generally easy to fix for humans, but not for parsers in general nor LR parsers in particular. Traditional ‘panic mode’ error recovery, though easy to implement and applicable to any grammar, often leads to a cascading chain of errors that drown out the original. More advanced error recovery…