Class: Rley::PTree::TerminalNode

Inherits:
ParseTreeNode show all
Defined in:
lib/rley/ptree/terminal_node.rb

Instance Attribute Summary collapse

Attributes inherited from ParseTreeNode

#range, #symbol

Instance Method Summary collapse

Methods inherited from ParseTreeNode

#done!

Constructor Details

#initialize(aToken, aPos) ⇒ TerminalNode

Returns a new instance of TerminalNode.

Parameters:

  • aToken (Lexical::Token) —

    Input Token object

  • aPos (Integer) —

    position of the token in the input stream.



13
14
15
16
17
18
19
20
 
# File 'lib/rley/ptree/terminal_node.rb', line 13

def initialize(aToken, aPos)
  # (major, minor) =

  # Use '1.class' trick to support both Integer and Fixnum classes
  range = aPos.kind_of?(1.class) ? { low: aPos, high: aPos + 1 } : aPos
  super(aToken.terminal, range)
  @token = aToken
end

Instance Attribute Details

#token ⇒ Lexical::Token (readonly)

Returns the input token.

Returns:



9
10
11
 
# File 'lib/rley/ptree/terminal_node.rb', line 9

def token
  @token
end

Instance Method Details

#accept(aVisitor) ⇒ Object

Part of the 'visitee' role in Visitor design pattern.

Parameters:



36
37
38
 
# File 'lib/rley/ptree/terminal_node.rb', line 36

def accept(aVisitor)
  aVisitor.visit_terminal(self)
end

#to_s ⇒ Object

Emit a short string representation of the node. Mainly used for diagnosis/debugging purposes.



30
31
32
 
# File 'lib/rley/ptree/terminal_node.rb', line 30

def to_s
  return super + ": '#{token.lexeme}'"
end

#to_string(indentation) ⇒ Object

Emit a (formatted) string representation of the node. Mainly used for diagnosis/debugging purposes.



24
25
26
 
# File 'lib/rley/ptree/terminal_node.rb', line 24

def to_string(indentation)
  return super + ": '#{token.lexeme}'"
end