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Contents
require_relative 'parse_tree_node' # Load superclass
module Rley # This module is used as a namespace
module PTree # This module is used as a namespace
class NonTerminalNode < ParseTreeNode
# Link to the input token
attr_reader(:children)
def initialize(aSymbol, aRange)
super(aSymbol, aRange)
@children = []
end
# @param aChildNode [ParseTreeNode-like] a child node.
def add_child(aChildNode)
children << aChildNode
end
# Emit a (formatted) string representation of the node.
# Mainly used for diagnosis/debugging purposes.
def to_string(indentation)
connector = '+- '
selfie = super(indentation)
prefix = "\n" + (' ' * connector.size * indentation) + connector
children_repr = children.reduce('') do |sub_result, child|
sub_result << prefix + child.to_string(indentation + 1)
end
return selfie + children_repr
end
# Part of the 'visitee' role in Visitor design pattern.
# @param aVisitor[ParseTreeVisitor] the visitor
def accept(aVisitor)
aVisitor.visit_nonterminal(self)
end
end # class
end # module
end # module
# End of file
Version data entries
8 entries across 8 versions & 1 rubygems