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# frozen_string_literal: true
require_relative 'vertex'
module Rley # This module is used as a namespace
module GFG # This module is used as a namespace
# Abstract class.
# Represents a specialized vertex in a grammar flow graph
# that is associated to a given non-terminal symbol and
# that may have in-degree or out-degree > 1
# Responsibilities (in addition to inherited ones):
# - Know its related non-terminal symbol
class NonTerminalVertex < Vertex
# The non-terminal symbol associated to the vertex
# @return [Syntax::NonTerminal]
attr_reader :non_terminal
# Constructor to specialize in subclasses.
# @param aNonTerminal [Syntax::NonTerminal]
def initialize(aNonTerminal)
super()
@non_terminal = aNonTerminal
end
protected
# Validation method for adding an outgoing edge to the vertex.
# A start vertex may accept an indegree and outdegree greater than one
def check_add_edge(anEdge)
anEdge
end
end # class
end # module
end # module
# End of file
Version data entries
12 entries across 12 versions & 1 rubygems