rucc
An optimizing C compiler in Rust that now builds and passes SQLite's tests
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Yantra
A grammar-to-C++ compiler front end that builds the whole tree before acting
If you are writing a small DSL in C++, Yantra gives you lexer, AST and walkers from one grammar file, with no dependencies beyond the standard library.
Yantra reads a single grammar file and generates the lexer, the parser and the tree walkers for a C++23 project. Unlike Yacc or Bison, it builds the complete syntax tree first and then runs your actions top-down, so a parent rule can look at its children and siblings before deciding what to do. It handles UTF-8, multi-mode lexing for nested comments, and several walkers from one grammar, and can emit everything as one amalgamated file. It is at 0.5.1: there is no error recovery yet, so parsing stops at the first syntax error.
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