Class: Packcr::Node::CharclassNode

Inherits:
Packcr::Node show all
Defined in:
lib/packcr/node/charclass_node.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Packcr::Node

#alt, #link_references, #nodes, #seq, #sequence?, #setup, #setup_rule, #verify_captures, #verify_variables

Constructor Details

#initialize(value = nil) ⇒ CharclassNode

Returns a new instance of CharclassNode.



6
7
8
 
# File 'lib/packcr/node/charclass_node.rb', line 6

def initialize(value = nil)
  @value = value
end

Instance Attribute Details

#value ⇒ Object

Returns the value of attribute value.



4
5
6
 
# File 'lib/packcr/node/charclass_node.rb', line 4

def value
  @value
end

Instance Method Details

#debug_dump(indent = 0) ⇒ Object 



10
11
12
13
14
 
# File 'lib/packcr/node/charclass_node.rb', line 10

def debug_dump(indent = 0)
  $stdout.print "#{" " * indent}Charclass(value:'"
  Packcr.dump_escaped_string(value)
  $stdout.print "')\n"
end

#generate_code(gen, onfail, indent, bare, oncut: nil) ⇒ Object 



20
21
22
23
24
25
26
 
# File 'lib/packcr/node/charclass_node.rb', line 20

def generate_code(gen, onfail, indent, bare, oncut: nil)
  if gen.ascii
    return generate_ascii_code(gen, onfail, indent, bare)
  else
    return generate_utf8_charclass_code(gen, onfail, indent, bare)
  end
end

#generate_reverse_code(gen, onsuccess, indent, bare, oncut: nil) ⇒ Object 



28
29
30
31
32
33
34
 
# File 'lib/packcr/node/charclass_node.rb', line 28

def generate_reverse_code(gen, onsuccess, indent, bare, oncut: nil)
  if gen.ascii
    raise "unexpected"
  else
    return generate_utf8_charclass_reverse_code(gen, onsuccess, indent, bare)
  end
end

#reachability ⇒ Object 



36
37
38
39
40
41
42
43
44
 
# File 'lib/packcr/node/charclass_node.rb', line 36

def reachability
  charclass = self.value
  n = charclass&.length || 0
  if charclass.nil? || n > 0
    return Packcr::CODE_REACH__BOTH
  else
    return Packcr::CODE_REACH__ALWAYS_FAIL
  end
end

#reversible?(gen) ⇒ Boolean

Returns:

  • (Boolean) 


16
17
18
 
# File 'lib/packcr/node/charclass_node.rb', line 16

def reversible?(gen)
  gen.lang == :rb && !gen.ascii
end