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Size: 853 Bytes
Versions: 19
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Stored size: 853 Bytes
Contents
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
end # class
end # module
end # module
# End of file
Version data entries
19 entries across 19 versions & 1 rubygems