Module: Rattler::Parsers::Combining

Included in:
Choice, Label, ListParser, Predicate, Repeat, Sequencing, Skip
Defined in:
lib/rattler/parsers/combining.rb

Overview

Combining describes a parser that is a combination of other parsers.

Instance Method Summary collapse

Instance Method Details

#capturing? ⇒ Boolean

Returns true if the parser returns parse results on success, or false if the parser simply returns true on success.

Returns:

  • (Boolean) —

    true if the parser returns parse results on success, or false if the parser simply returns true on success



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# File 'lib/rattler/parsers/combining.rb', line 7

def capturing?
  @capturing ||= any? {|child| child.capturing? }
end

#capturing_decidable? ⇒ Boolean

true if it can be determined statically whether the parser returns parse results on success

Returns:

  • (Boolean) —

    true if it can be determined statically whether the parser returns parse results on success



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# File 'lib/rattler/parsers/combining.rb', line 12

def capturing_decidable?
  @capturing_decidable ||= all? {|child| child.capturing_decidable? }
end

#semantic? ⇒ Boolean

Returns true if the parser is a semantic action.

Returns:

  • (Boolean) —

    true if the parser is a semantic action



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# File 'lib/rattler/parsers/combining.rb', line 17

def semantic?
  @semantic = any? {|child| child.semantic? }
end

#with_ws(ws) ⇒ Parser

Returns a new parser that uses ws to skip whitespace.

Parameters:

  • ws (Parser) —

    the parser used to skip whitespace

Returns:

  • (Parser) —

    a new parser that uses ws to skip whitespace



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# File 'lib/rattler/parsers/combining.rb', line 22

def with_ws(ws)
  self.class.new(children.map {|_| _.with_ws(ws) }, attrs)
end