The LALR parser generator (LPG) is a tool for developing scanners and parsers. Supports multi-language . Input is specified by BNF rules. LPG supports backtracking (to resolve ambiguity), automatic AST generation and grammar inheritance.
LALR(1) parser-table generator + runtime in C# (.NET 10/AOT) with a YAML-grammar schema and Roslyn source generator pipeline; current branch has WIP changes adding a 3-column TUI debugger and tweaks across the schema/generator/visitor layers.