Class: Ripper::Filter

Inherits:
Object
  • Object
show all
Defined in:
lib/ripper/filter.rb

Overview

This class handles only scanner events, which are dispatched in the 'right' order (same with input).

Instance Method Summary collapse

Constructor Details

#initialize(src, filename = '-', lineno = 1) ⇒ Filter

Creates a new Ripper::Filter instance, passes parameters src, filename, and lineno to Ripper::Lexer.new

The lexer is for internal use only.


24
25
26
27
28
29
# File 'lib/ripper/filter.rb', line 24

def initialize(src, filename = '-', lineno = 1)
  @__lexer = Lexer.new(src, filename, lineno)
  @__line = nil
  @__col = nil
  @__state = nil
end

Instance Method Details

#columnObject

The column number of the current token. This value starts from 0. This method is valid only in event handlers.


46
47
48
# File 'lib/ripper/filter.rb', line 46

def column
  @__col
end

#filenameObject

The file name of the input.


32
33
34
# File 'lib/ripper/filter.rb', line 32

def filename
  @__lexer.filename
end

#linenoObject

The line number of the current token. This value starts from 1. This method is valid only in event handlers.


39
40
41
# File 'lib/ripper/filter.rb', line 39

def lineno
  @__line
end

#parse(init = nil) ⇒ Object

Starts the parser. init is a data accumulator and is passed to the next event handler (as of Enumerable#inject).


59
60
61
62
63
64
65
66
67
68
69
70
# File 'lib/ripper/filter.rb', line 59

def parse(init = nil)
  data = init
  @__lexer.lex.each do |pos, event, tok, state|
    @__line, @__col = *pos
    @__state = state
    data = if respond_to?(event, true)
           then __send__(event, tok, data)
           else on_default(event, tok, data)
           end
  end
  data
end

#stateObject

The scanner's state of the current token. This value is the bitwise OR of zero or more of the Ripper::EXPR_* constants.


52
53
54
# File 'lib/ripper/filter.rb', line 52

def state
  @__state
end