Class: Lrama::Grammar::ParameterizingRule::Rhs

Inherits:
Object
  • Object
show all
Defined in:
lib/lrama/grammar/parameterizing_rule/rhs.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Rhs

Returns a new instance of Rhs.



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# File 'lib/lrama/grammar/parameterizing_rule/rhs.rb', line 9

def initialize
  @symbols = []
  @user_code = nil
  @precedence_sym = nil
end

Instance Attribute Details

#precedence_sym ⇒ Object

Returns the value of attribute precedence_sym.



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# File 'lib/lrama/grammar/parameterizing_rule/rhs.rb', line 7

def precedence_sym
  @precedence_sym
end

#symbols ⇒ Object

Returns the value of attribute symbols.



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# File 'lib/lrama/grammar/parameterizing_rule/rhs.rb', line 7

def symbols
  @symbols
end

#user_code ⇒ Object

Returns the value of attribute user_code.



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# File 'lib/lrama/grammar/parameterizing_rule/rhs.rb', line 7

def user_code
  @user_code
end

Instance Method Details

#resolve_user_code(bindings) ⇒ Object 



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# File 'lib/lrama/grammar/parameterizing_rule/rhs.rb', line 15

def resolve_user_code(bindings)
  return unless user_code

  resolved = Lexer::Token::UserCode.new(s_value: user_code.s_value, location: user_code.location)
  var_to_arg = {} #: Hash[String, String]
  symbols.each do |sym|
    resolved_sym = bindings.resolve_symbol(sym)
    if resolved_sym != sym
      var_to_arg[sym.s_value] = resolved_sym.s_value
    end
  end

  var_to_arg.each do |var, arg|
    resolved.references.each do |ref|
      if ref.name == var
        ref.name = arg
      end
    end
  end

  return resolved
end