generictest.nim

import strutils

let vars = ["ACC", "BAK", "NIL"]

proc isNumber*(input: string): bool = 
    for i in 0..input.len-1:
        if not input[i].isDigit:
            return false
    return true

proc checkVar[T](input: string): T =
    if not input.isNumber:
        var valid = false
        for d in 0..vars.len-1:
            if input == vars[d]:
                valid = true
        if valid:
            return input
        else:
            return ""
    else:
        return input.parseInt
        
        
        
        
var newVar = checkVar("TES")
                    
if newVar is string:
    if newVar == "":
        errors.add ASMError(text: "Instruction " & instruction.label & " was given an unkown variable " & io[0], line: i+1)
        break finishedLine
elif newVar is int:
    echo "The instruction, " & instruction.label & " has a correct numeric input: ", newVar