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Contents
require 'forwardable'
module Rley # This module is used as a namespace
module Syntax # This module is used as a namespace
# A symbol sequence is a suite of grammar symbols
class SymbolSeq
extend Forwardable
def_delegators :@members, :empty?, :size, :[], :each, :find, :map
# @return [Array<GrmSymbol>] The sequence of symbols
attr_reader(:members)
# Create a sequence of grammar symbols (as in right-hand side of
# a production rule).
# @param theSymbols [Array<GrmSymbol>] An array of symbols.
def initialize(theSymbols)
@members = theSymbols.dup
end
# Equality operator.
# @param other [SymbolSeq|Array]
# @return [Boolean]
def ==(other)
return true if other.object_id == object_id
case other
when SymbolSeq then result = other.members == members
when Array then result = other == members
else
msg = "Cannot compare a SymbolSeq with a #{other.class}"
raise StandardError, msg
end
return result
end
# Returns a string containing a human-readable representation of the
# sequence of symbols.
# @return [String]
def inspect()
result = "#<#{self.class.name}:#{self.object_id}"
symbol_names = self.members.map(&:name)
result << " @members=#{symbol_names}>"
return result
end
end # class
end # module
end # module
# End of file
Version data entries
5 entries across 5 versions & 1 rubygems