Method: Parser::Base#initialize

Defined in:
lib/parser/base.rb

#initialize(builder = Parser::Builders::Default.new) ⇒ Base

Returns a new instance of Base.

Parameters:

  • builder (Parser::Builders::Default) (defaults to: Parser::Builders::Default.new) —

    The AST builder to use.



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# File 'lib/parser/base.rb', line 129

def initialize(builder=Parser::Builders::Default.new)
  @diagnostics = Diagnostic::Engine.new

  @static_env  = StaticEnvironment.new

  # Stack that holds current parsing context
  @context = Context.new

  # Maximum numbered parameters stack
  @max_numparam_stack = MaxNumparamStack.new

  # Current argument names stack
  @current_arg_stack = CurrentArgStack.new

  # Stack of set of variables used in the current pattern
  @pattern_variables = VariablesStack.new

  # Stack of set of keys used in the current hash in pattern matchinig
  @pattern_hash_keys = VariablesStack.new

  @lexer = Lexer.new(version)
  @lexer.diagnostics = @diagnostics
  @lexer.static_env  = @static_env
  @lexer.context     = @context

  @builder = builder
  @builder.parser = self

  # Last emitted token
  @last_token = nil

  if self.class::Racc_debug_parser && ENV['RACC_DEBUG']
    @yydebug = true
  end

  reset
end