# parser

### Prerequisites

* Rexical (rex) 
* Racc

### Available commands

* `rake lexer` - generates `lexer.rb` file based on `specification.rex` file
* `rake parser` - generates `parser.rb` file based on `grammar.y` file
* `rake generate` - generates `lexer.rb` and `parser.rb` files

### Testing

To run only `lexer` tests, execute : `rspec spec/query_lexer_spec.rb`
To run only `parser` tests, execute : `rspec spec/query_parser_spec.rb`

To run all tests, execute : `rake spec`