Brainfun

This is brainfuck language interpreter library. There is no look ahead in the implementation, it memorizes input instead to return later. Stack is used for functions, can be used basically for anything. The Interpreter is very extensible because functions can change state as they want. However, it can not add symbols to the input of the Execute and can not change history. State is also protected from Interpreter itself.

Usage

brainfuck := brainfun.NewInterpreter() // creates new interpreter with default set of function

err := brainfuck.Execute(strings.NewReader("+++")) // executes program, should be ended, for example no open loops

You can replace functions of read and write with new, which contains your input

buf := &bytes.Buffer{}
brainfuck.AddFunc('.', PrintWith(buf))
brainfuck.AddFunc(',', ReadWith(strings.NewReader("DBAC")))

Last - you can remove your function

brainfuck.DeleteFunc('.')

Possible improvements

• State can be encapsulated with Public API even for functions, but this would make extensions much more complex (but still possible, because Brainfuck is Turing complete)