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hodor's Introduction

A Brainfuck interpreter to rule them all!

Yet another interpreter for Brainfuck dialects:

  • Brainfuck
  • OokOok
  • WoopWoop
  • Hodor
  • Buffalo

With a common backend, so that no new parser is needed to create a new dialect.

What is this Hodor language ?

Surprisingly, it seems that Hodor is turing complete since he is capable of implementing a dialect of Brainfuck... Here are the instructions:

Hodor Brainfuck Description
Hodor. Hodor? > Move the pointer to the right
Hodor? Hodor. < Move the pointer to the left
Hodor. Hodor. + Increment the memory cell under the pointer
Hodor! Hodor! - Decrement the memory cell under the pointer
Hodor! Hodor. . Output the character signified by the cell at the pointer
Hodor. Hodor! , Input a character and store it in the cell at the pointer
Hodor! Hodor? [ Jump past the matching Hodor? Hodor! if the cell under the pointer is 0
Hodor? Hodor! ] Jump back to the matching Hodor! Hodor?

Example

Here is how Hodor would say "Hello World!":

Hodor. Hodor? Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor. Hodor. Hodor! Hodor? Hodor? Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor? Hodor! Hodor! Hodor? Hodor! Hodor? Hodor.
Hodor! Hodor. Hodor. Hodor? Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor! Hodor? Hodor? Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor?
Hodor! Hodor! Hodor? Hodor! Hodor? Hodor. Hodor. Hodor. Hodor! Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor! Hodor. Hodor! Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor! Hodor. Hodor. Hodor? Hodor. Hodor? Hodor. Hodor? Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor! Hodor? Hodor? Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor? Hodor! Hodor! Hodor? Hodor! Hodor? Hodor. Hodor! Hodor.
Hodor. Hodor? Hodor. Hodor? Hodor. Hodor? Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor! Hodor? Hodor? Hodor. Hodor. Hodor.
Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor. Hodor? Hodor! Hodor! Hodor? Hodor! Hodor? Hodor. Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor.
Hodor? Hodor. Hodor? Hodor. Hodor? Hodor. Hodor? Hodor. Hodor! Hodor. Hodor. Hodor. Hodor. Hodor. Hodor. Hodor.
Hodor! Hodor. Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor.
Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor! Hodor!
Hodor! Hodor. Hodor. Hodor? Hodor. Hodor? Hodor. Hodor. Hodor! Hodor.

Build

First you must have stack installed. On recent Ubuntu (16.04) it can be installed with:

apt-get install haskell-stack

Then compiling is very easy:

stack build

Run

stack exec hodor -- [Hodor|Brainfuck|OokOok|WoopWoop|Buffalo] file

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