This is My version of JLox from the book craftinginterpreters.
It is mostly the same as presented in the book, but I have made a few changes:

• Integers:
  • int values are supported alongside doubles.
  • when doing math, if both operands are ints, then integer math is used, otherwise both operands are treated as doubles.
• String concatenation:
  • concat is done using the .. operator and not the + operator.
  • concat operator converts all operands to a String representation.
• some keywords have been changed:
  • var -> stash
  • class -> designation
  • func -> functi
  • print -> say
  • this -> self
• internal changes:
  • code has been organized along a more java enterprise style of coding. perhaps to an excessive extent.
  • I used java 13 and 14 features such as enhanced switch and instanceof operators when applicable.
  • I used streams rather than loops where applicable.
  • reorganized some code to be in a separate method/class. reorganized some switch cases. did a few other small miscellaneous code changes.
  • overall, my code doesn't match 100% what is in the book,but the end result when running the interpreter is the same.
• Implements anonymous functions:
  • this is an optional challenge in the book, a basic Lox implementation might not implement this feature.
• Inheritance
  • the operator for declaring a superclass is :
    • for example, to declare that mySubCLass is a subclass of mySuperClass : designation mySubClass : mySuperClass {}