Class: Lrama::Grammar::Code

Inherits:
Struct
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/lrama/grammar/code.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#token_code ⇒ Object

Returns the value of attribute token_code



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# File 'lib/lrama/grammar/code.rb', line 5

def token_code
  @token_code
end

#type ⇒ Object

Returns the value of attribute type



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# File 'lib/lrama/grammar/code.rb', line 5

def type
  @type
end

Instance Method Details

#translated_code ⇒ Object

$$, $n, @$, @n is translated to C code



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# File 'lib/lrama/grammar/code.rb', line 11

def translated_code
  case type
  when :user_code
    translated_user_code
  when :initial_action
    translated_initial_action_code
  end
end

#translated_printer_code(tag) ⇒ Object Also known as: translated_error_token_code

  • ($1) error

  • ($$) *yyvaluep

  • (@1) error

  • (@$) *yylocationp



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# File 'lib/lrama/grammar/code.rb', line 24

def translated_printer_code(tag)
  t_code = s_value.dup

  references.reverse.each do |ref|
    first_column = ref.first_column
    last_column = ref.last_column

    case
    when ref.value == "$" && ref.type == :dollar # $$
      # Omit "<>"
      member = tag.s_value[1..-2]
      str = "((*yyvaluep).#{member})"
    when ref.value == "$" && ref.type == :at # @$
      str = "(*yylocationp)"
    when ref.type == :dollar # $n
      raise "$#{ref.value} can not be used in %printer."
    when ref.type == :at # @n
      raise "@#{ref.value} can not be used in %printer."
    else
      raise "Unexpected. #{self}, #{ref}"
    end

    t_code[first_column..last_column] = str
  end

  return t_code
end