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.