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module Lrama
class Grammar
class ParameterizingRules
class Builder
# Builder for option of general parameterizing rules
class Option < Base
# program: option(number)
#
# =>
#
# program: option_number
# option_number: ε
# option_number: number
def build
validate_argument_number!
rules = []
@build_token = Lrama::Lexer::Token::Ident.new(s_value: "option_#{@token.s_value}")
rules << Rule.new(id: @rule_counter.increment, _lhs: @build_token, _rhs: [], lhs_tag: @lhs_tag, token_code: @user_code, precedence_sym: @precedence_sym, lineno: @line)
rules << Rule.new(id: @rule_counter.increment, _lhs: @build_token, _rhs: [@token], lhs_tag: @lhs_tag, token_code: @user_code, precedence_sym: @precedence_sym, lineno: @line)
rules
end
end
end
end
end
end
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