# This esolang is a brainfuck derivative

This esolang is a brainfuck derivative is a brainfuck derivative by User:None1.

## Syntax

This esolang is a brainfuck derivative programs are the sentence `This esolang is a brainfuck derivative`

written over and over, with wrong characters, separated by *line feeds*.

Every line with the length the same as `This esolang is a brainfuck derivative`

represents a brainfuck command. Which command it stands for depends on how many wrong characters there are.

Number of wrong characters modulo 8 | brainfuck |
---|---|

0 | + |

1 | - |

2 | , |

3 | . |

4 | > |

5 | < |

6 | [ |

7 | ] |

For instance, the sentence `This esolang is a brainfuck derivative`

itself stands for a `+`

command, while the sentence `This esoalng is a brainfuck derivative`

or `This esolang isaaabrainfuck derivative`

stands for a `,`

command. Additionally, the sentence `P@nO~abAF8`aM&Qd2{`L%0}cW7w7#3I=,`sn_Q`

stands for the `[`

command because it has no characters the same as `This esolang is a brainfuck derivative`

and therefore 38 wrong characters.

Lines that are longer or shorter than the sentence `This esolang is a brainfuck derivative`

are NOPs. Tabs are treated as 4 spaces.

## Examples

### Cat Program

This esolang is a brainflak derivative P@nO~abAF8`aM&Qd2{`L%0}cW7w7#3I=,`sn_Q xxxx!esolang!is!A!brainfuck!derivativE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa P@nO~abAF8`aM&Qd2{`L%0}cW7w7#3Iivative

(brainfuck: ,[.,])

### XKCD Random Number

This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainf*** derivative chosen by fair dice roll guarranteed to be random

*Note: the three stars in the program are MANDATORY, while the last two lines are not.*
(brainfuck: ++++++++++++++++++++++++++++++++++++++++++++++++++++.)

### Hello World

This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative T%js evqlQng Cs a brainfuck derivative 8-i4 @solang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative Fd{s6^solanz is a brainfuck derivative T>bl6esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative 8hrsZe3olang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative /hniNesolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative T'^s-e;olang is a brainfuck derivative This esolang is a brainfuck derivative `hks ;Dhlang is a brainfuck derivative HhFs9;3olang is a brainfuck derivative {hisRU|olang^is a brainfuck derivative U"ZX e|olang is a brainfuck derivative Thxs esolang is a brainfuck derivative T:4sQes_{:nY is a brainfuck derivative =|isEesnlang is a brainfuck derivative This esolang is a brainfuck derivative |hiv3Xsolang is a brainfuck derivative This esolang is a brainfuck derivative ThisF:sohaNg is a brainfuck derivative ^his esolang is a brainfuck derivative Thiq YIooang is a brainfuck derivative T"islHsolan7 is a brainfuck derivative This esolang is a brainfuck derivative 7hi7Keso2aniTis a brainfuck derivative 0h_s|e<ohang is a brainfuck derivative C4Ks esoDang j{ba brainfuck derivative ihcs#exo$ang is a brainfuck derivative Tkis esolang is a brainfuck derivative NhM"@eSolanJ iD a brainfuck derivative toisABsolang is a brainfuck derivative nhJs`Xsolang is a brainfuck derivative 3h2s eso&ang is a brainfuck derivative >1>v esolang is a brainfuck derivative T)is esolang is a brainfuck derivative ThisGesolang is a brainfuck derivative Qhis esolang is a brainfuck derivative T=is-'solang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative TNid eRolang is a brainfuck derivative ThiM#Asolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative ThiN2esol*ng is a brainfuck derivative ThXe.ebolang is a brainfuck derivative This e:~la#_ is a brainfuck derivative ThesG>solang is a brainfuck derivative TTes en{lOng is a brainfuck derivative Tjis esolang is a brainfuck derivative Tvhs esola|g is a brainfuck derivative X*isnemo$ang is a brainfuck derivative thls exolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative TJi7 ezolang is a brainfuck derivative Tpis esolang is a brainfuck derivative Thi1 esolang is a brainfuck derivative 4his esolang is a brainfuck derivative TOis esolang is a brainfuck derivative Uhis esolang is a brainfuck derivative &his esolang is a brainfuck derivative Th\Zqesolang is a brainfuck derivative Dhis esolang is a brainfuck derivative T*is esolang is a brainfuck derivative nhis esolang is a brainfuck derivative yhis esolang is a brainfuck derivative Thjs esolang is a brainfuck derivative ThSs esolang is a brainfuck derivative :his esolang is a brainfuck derivative [his esolang is a brainfuck derivative #h=s osolang is a brainfuck derivative Rhps(Psolang is a brainfuck derivative Vjim esRlang is a brainfuck derivative This esolang is a brainfuck derivative ihiC es8lang is a brainfuck derivative >hi` esolang isZ] brainfuck derivative This esolang is a brainfuck derivative This esolang is a brainfuck derivative TLAs<esolang is a brainfuck derivative

## Interpreter

The following is the interpreter for the esolang in Python, EOF returns 0 (-1 in JIT mode), if you have jitbf installed, this interpreter will JIT-interpret the code with jitbf.

import sys def bf(code): s1=[] s2=[] matches={} tape=[0]*1000000 for i,j in enumerate(code): if j=='[': s1.append(i) if j==']': m=s1.pop() matches[m]=i matches[i]=m cp=0 p=0 while cp<len(code): if code[cp]=='+': tape[p]=(tape[p]+1)%256 if code[cp]=='-': tape[p]=(tape[p]-1)%256 if code[cp]==',': c=sys.stdin.read(1) tape[p]=(ord(c) if c else 0)%256 if code[cp]=='.': print(chr(tape[p]),end='') if code[cp]=='<': p-=1 if code[cp]=='>': p+=1 if code[cp]=='[': if not tape[p]: cp=matches[cp] if code[cp]==']': if tape[p]: cp=matches[cp] cp+=1 try: import jitbf except: pass else: def bf(code): j=jitbf.bf2jit(code) j() diff=lambda x:sum([j!='This esolang is a brainfuck derivative'[i] for i,j in enumerate(x)]) brain='' while 1: try: x=input().replace("\t"," ") except: break if len(x)==len('This esolang is a brainfuck derivative'): brain+='+-,.><[]'[diff(x)%8] bf(brain)