Module: KeywordSearch

Defined in:
lib/keyword_search.rb,
lib/keyword_search/grammar.rb,
lib/keyword_search/evaluator.rb,
lib/keyword_search/definition.rb

Defined Under Namespace

Classes: Definition, Evaluator, Grammar, ParseError, Parser

Constant Summary collapse

VERSION = 
'1.2.0'

Class Method Summary collapse

Class Method Details

.search(input_string, definition = nil, &block) ⇒ Object 



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# File 'lib/keyword_search.rb', line 15

def search(input_string, definition=nil, &block)
  @evaluator ||= Evaluator.new
  definition ||= Definition.new(&block)
  parse_result = Parser.parse(Lexer.lex(input_string))
  unless parse_result.has_error?
    results = @evaluator.evaluate(parse_result.parse_tree)
    results.each do |key, terms|
      definition.handle(key, terms)
    end
    results
  else
    raise ParseError, "Unexpected token #{parse_result.unexpected_token.inspect}"
  end
end