lua_rust

lua syntax parser in Rust

• Greatly in progress
• LALR(1), GLR parser
• syntax referenced from lua 5.4 reference manual

project structure

• tokenizer: tokenizing lua code string.
• parser: parsing tokenized lua code into AST.
• semantics: semantic analysis of generated AST. It generates a Enhanced AST which contains more information than the original AST.
  • stack offset of local variables
  • scope checking for return, break, goto, label, ...
  • split function definition into separated Chunks
• lua_ir : generate IRs from enhanced AST, and run on virtual machine.

Cargo Features

• 32bit: use 32bit integer and float for lua numeric type
• diag: enable to_diag() function for ParseError

how to run

$ cargo run <source_file.lua>

will print the pretty-formatted Debug output of the AST ( "{:#?}" )

lib.rs:

// type of `lua_parser::Block`
let block = lua_parser::parse_str( ... )?;

// semantic analysis, and generate enhanced AST for later use.
let enhanced_ast = lua_semantics::process(block)?;