Sha256: 14078b0608dbcefcb042e19e29dd70cba8658335912d38dc9d9ebb195c733432
Contents?: true
Size: 898 Bytes
Versions: 8
Compression:
Stored size: 898 Bytes
Contents
# frozen_string_literal: true
require_relative 'grm_symbol' # Load superclass
module Rley # This module is used as a namespace
module Syntax # This module is used as a namespace
# A terminal symbol represents a class of words in the language
# defined the grammar.
class Terminal < GrmSymbol
# Constructor.
# @param aName [String] The name of the grammar symbol.
def initialize(aName)
super(aName)
self.generative = true
end
# Return true iff the symbol is a terminal
def terminal?
return true
end
# @return [false] Return true if the symbol derives
# the empty string. As terminal symbol corresponds to a input token
# it is by definition non-nullable.
def nullable?
false
end
def to_s
name
end
end # class
end # module
end # module
# End of file
Version data entries
8 entries across 8 versions & 1 rubygems