Contents

require_relative '../ast_filter'
require_relative '../ast_generator'
require_relative '../parsers/common'
require_relative '../parsers/expression'
require_relative '../parsers/bel_script'

module BELParser
  module Script
    # Parser for BEL Script.
    class Parser
      include BELParser::Parsers::Common
      include BELParser::Parsers::Expression
      include BELParser::Parsers::BELScript

      FILTER = BELParser::ASTFilter.new(
        :simple_statement,
        :observed_term,
        :nested_statement,
        :define_annotation,
        :define_namespace,
        :set,
        :unset,
        :blank_line,
        :comment_line
      )

      def each(io)
        if block_given?
          filtered_ast = FILTER.each(BELParser::ASTGenerator.new.each(io))
          filtered_ast.each do |results|
            yield results
          end
        else
          enum_for(:each, io)
        end
      end
    end
  end
end

if __FILE__ == $PROGRAM_NAME
  BELParser::Script::Parser.new.each($stdin) do |line_result|
    line_number, line, ast_results = line_result
    puts "#{line_number}: #{line}"
    ast_results.each do |ast|
      puts ast.to_s(1)
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
bel_parser-1.0.0.alpha.6	lib/bel_parser/script/parser.rb