Class: Dhaka::LexerSupport::ZeroOrOneNode

Inherits:

UnaryNode

• Object
• ASTNode
• UnaryNode
• Dhaka::LexerSupport::ZeroOrOneNode

Defined in:

lib/lexer/regex_grammar.rb

Instance Attribute Summary

Attributes inherited from UnaryNode

#child

Instance Method Summary

• #label ⇒ Object
• #nullable ⇒ Object

Methods inherited from UnaryNode

#calculate_follow_sets, #first, #initialize, #last, #to_dot

Methods inherited from ASTNode

#accepting, #checkpoint

Constructor Details

This class inherits a constructor from Dhaka::LexerSupport::UnaryNode

Instance Method Details

#label ⇒ Object

# File 'lib/lexer/regex_grammar.rb', line 317

def label
  "?"
end

#nullable ⇒ Object

# File 'lib/lexer/regex_grammar.rb', line 321

def nullable
  true
end