ValidNumber.kt

fun main(){
    val context = StateContext()
    val test1 = "123."
    val test2 = "123er45"
    val test3 = "-145.36"

    println("$test1 is ${if(context.parseString(test1)) "" else "not "}a valid number.")
    println("$test2 is ${if(context.parseString(test2)) "" else "not "}a valid number.")
    println("$test3 is ${if(context.parseString(test3)) "" else "not "}a valid number.")
}