1
exercism fetch csharp forth

Forth

Implement an evaluator for a very simple subset of Forth.

Forth is a stack-based programming language. Implement a very basic evaluator for a small subset of Forth.

Your evaluator has to support the following words:

Your evaluator also has to support defining new words using the customary syntax: : word-name definition ;.

To keep things simple the only data type you need to support is signed integers of at least 16 bits size.

You should use the following rules for the syntax: a number is a sequence of one or more (ASCII) digits, a word is a sequence of one or more letters, digits, symbols or punctuation that is not a number. (Forth probably uses slightly different rules, but this is close enough.)

Words are case-insensitive.

Hints

Submitting Exercises

Note that, when trying to submit an exercise, make sure the exercise file that you're submitting is in the exercism/csharp/<exerciseName> directory.

For example, if you're submitting bob.cs for the Bob exercise, the submit command would be something like exercism submit <path_to_exercism_dir>/csharp/bob/bob.cs.

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.