ima1zumi / lrama

Lrama

Lrama is LALR (1) parser generator written by Ruby. The first goal of this project is providing error tolerant parser for CRuby with minimal changes on CRuby parse.y file.

Features

• Bison style grammar file is supported with some assumptions
  • b4_locations_if is always true
  • b4_pure_if is always true
  • b4_pull_if is always false
  • b4_lac_if is always false
• Error Tolerance parser
  • Subset of Repairing Syntax Errors in LR Parsers (Corchuelo et al.) algorithm is supported

Installation

$ gem install lrama

From source codes,

$ cd "$(lrama root)"
$ bundle install
$ bundle exec rake install
$ bundle exec lrama --version
0.5.0

Usage

# "y.tab.c" and "y.tab.h" are generated
$ lrama -d sample/parse.y

Build Ruby

1. Install Lrama
2. Run make YACC=lrama

License

See LEGAL.md file.