Class: RubyLex

Inherits:
Object show all
Defined in:
lib/cosmos/utilities/ruby_lex_utils.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#exp_line_no ⇒ Integer

Returns The expression line number. This can differ from the actual line number due to white space and Ruby control keywords.

Returns:

  • (Integer) —

    The expression line number. This can differ from the actual line number due to white space and Ruby control keywords.



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# File 'lib/cosmos/utilities/ruby_lex_utils.rb', line 24

def exp_line_no
  @exp_line_no
end

#indent ⇒ Object

Returns the value of attribute indent.



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# File 'lib/cosmos/utilities/ruby_lex_utils.rb', line 20

def indent
  @indent
end

Instance Method Details

#get_readed ⇒ Object

Monkey patch to fix performance issue caused by call to reverse



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# File 'lib/cosmos/utilities/ruby_lex_utils.rb', line 50

def get_readed
  if idx = @readed.rindex("\n")
    @base_char_no = @readed.size - (idx + 1)
  else
    @base_char_no += @readed.size
  end

  readed = @readed.join("")
  @readed = []
  readed
end

#reinitialize ⇒ Object

Resets the RubyLex in preparation of parsing a line



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# File 'lib/cosmos/utilities/ruby_lex_utils.rb', line 27

def reinitialize
  @seek                      = 0
  @exp_line_no               = 1
  @line_no                   = 1
  @base_char_no              = 0
  @char_no                   = 0
  @rests.clear
  @readed.clear
  @here_readed.clear
  @indent                    = 0
  @indent_stack.clear
  @lex_state                 = EXPR_BEG
  @space_seen                = false
  @here_header               = false
  @continue                  = false
  @line                      = ''
  @skip_space                = false
  @readed_auto_clean_up      = false
  @exception_on_syntax_error = true
  @prompt                    = nil
end

#ungetc(c = nil) ⇒ Object

Monkey patch to fix performance issue caused by call to reverse



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# File 'lib/cosmos/utilities/ruby_lex_utils.rb', line 63

def ungetc(c = nil)
  if @here_readed.empty?
    c2 = @readed.pop
  else
    c2 = @here_readed.pop
  end
  c = c2 unless c
  @rests.unshift c #c =
  @seek -= 1
  if c == "\n"
    @line_no -= 1
    if idx = @readed.rindex("\n")
      @char_no = idx + 1
    else
      @char_no = @base_char_no + @readed.size
    end
  else
    @char_no -= 1
  end
end