module Rpl
  module Core
    module_function

    # evaluate (run) a program, or recall a variable. ex: 'my_prog' eval
    def eval( stack, dictionary )
      stack, args = Rpl::Core.stack_extract( stack, [%i[program word name]] )

      # we trim enclosing «»
      preparsed_input = args[0][:type] == :word ? args[0][:value] : args[0][:value][1..-2]
      parsed_input = Rpl::Parser.new.parse_input( preparsed_input )

      stack, _dictionary = Rpl::Runner.new.run_input( stack, dictionary, parsed_input )
      # TODO: check that STO actually updates dictionary

      stack
    end
  end
end