In my current application I am trying to determine the best way to implement a simple scripting language. This language would allow a user to create a script that controls a machine with various inputs and outputs. I have defined most of the commands and created a nice editor for the language though I am stuck now trying to figure out how to verify, parse, and "compile" it.
I currently treat the commands as
const String and plan to parse the input script text with regex and these strings. Most of the commands have the syntax
COMMAND Arg1 Arg2 Arg3 etc.
The types and numbers of arguments are currently not defined anywhere in my code, only in my head. I need a design pattern that would allow me to take a line from the script and determine if it is valid; check the command versus some list and check its arguments against the match in that list.
Are there any known design patterns for situations like this; scripting languages in general?
I feel like I need a class
Command that holds the command string and information about its arguments, also the translation from string to "action" (performing the actual real life action the command describes). Then if I am to encounter the string representing the command I can lookup the command class instance, pass in the line, and get some result if it is valid. Though I feel like I would end up (in my case) with quite a few
Command sub classes.
Any ideas or recommendations?