Module: Temill::ParserHack

Included in:
Ruby23Parser
Defined in:
lib/temill/parser.rb

Overview

Override parser and scanner actions since we need the range of each expr in Ruby programs

Instance Method Summary collapse

Instance Method Details

#after_reduce(val, _values, result) ⇒ Object 



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# File 'lib/temill/parser.rb', line 20

def after_reduce(val, _values, result)
  min = max = nil
  #debug_print_state_stack
  val.each{| v |
    if v.kind_of?(ParserResult) and v.sym != :tNL
      min = [min, v.line_range.min].compact.min
      max = [max, v.line_range.max].compact.max
    end
  }

  if result.kind_of?(Sexp)
    result.line_range = min..max
  end
  # sym is not specified, but OK as long as it is used to check whether
  # the symbol is newline or not.
  ParserResult.new(result, min..max, nil)
end

#before_reduce(val, *rest) ⇒ Object 



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# File 'lib/temill/parser.rb', line 9

def before_reduce(val, *rest)
  #ap val
  val.map{| v |
    if v.kind_of?(ParserResult)
      v.value
    else
      v
    end
  }
end

#debug_print_state_stack ⇒ Object 



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# File 'lib/temill/parser.rb', line 45

def debug_print_state_stack
  if @racc_tstack
    pp @racc_tstack.zip(@racc_vstack).map{| tok,v |
      [token_to_str(tok), v]
    }
  end
end

#next_token ⇒ Object

wrap the value of each token to ParserResult



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# File 'lib/temill/parser.rb', line 39

def next_token
  sym,val = super
  lineno = lexer.lineno
  [sym, ParserResult.new(val, lineno..lineno, sym)]
end