Class: Walrat::AndPredicate

Inherits:
Predicate show all
Defined in:
lib/walrat/and_predicate.rb

Instance Attribute Summary

Attributes inherited from Predicate

#hash

Instance Method Summary collapse

Methods inherited from Predicate

#eql?, #initialize, #to_parseable

Methods included from Memoizing

#check_left_recursion, #memoizing_parse

Methods included from ParsletCombining

#&, #>>, #and?, #and_predicate, #choice, #memoizing_parse, #merge, #not!, #not_predicate, #omission, #one_or_more, #optional, #repeat, #repeat_with_default, #repetition, #repetition_with_default, #sequence, #skip, #zero_or_more, #zero_or_one, #|

Constructor Details

This class inherits a constructor from Walrat::Predicate

Instance Method Details

#parse(string, options = {}) ⇒ Object

Raises:

  • (ArgumentError) 


27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/walrat/and_predicate.rb', line 27

def parse string, options = {}
  raise ArgumentError if string.nil?
  catch :ZeroWidthParseSuccess do
    begin
      parsed = @parseable.memoizing_parse string, options
    rescue ParseError
      raise ParseError.new('predicate not satisfied (expected "%s") while parsing "%s"' % [@parseable.to_s, string],
                           :line_end => options[:line_start],
                           :column_end => options[:column_start])
    end
  end

  # getting this far means that parsing succeeded
  throw :AndPredicateSuccess
end