Class: Yaparc::Alt

Inherits:
Object
  • Object
show all
Includes:
Parsable
Defined in:
lib/yaparc/alt.rb

Constant Summary

Constants included from Parsable

Parsable::IS_ALPHANUM, Parsable::IS_CR, Parsable::IS_DIGIT, Parsable::IS_LOWER, Parsable::IS_SPACE, Parsable::IS_WHITESPACE

Instance Method Summary collapse

Methods included from Parsable

#parse

Constructor Details

#initialize(*parsers) ⇒ Alt

Returns a new instance of Alt.



7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
# File 'lib/yaparc/alt.rb', line 7

def initialize(*parsers)
  @parser = lambda do |input|
    final_result = Fail.new(input:)
    parsers.each do |parser|
      case result = parser.parse(input)
      in Fail
        next
      in OK
        break final_result = result
      end
    end
    final_result
  end
end