Usando dos idiomas de su elección, escriba el " quine mutuo" más pequeño que pueda.

Es decir, escriba un programa P en el lenguaje A que muestre el código fuente de un programa Q en el lenguaje B, de modo que la salida del programa Q sea idéntica al código fuente de P.

Los archivos vacíos no cuentan, ni los programas de estilo "leer el archivo fuente e imprimirlo".

Editar: Las respuestas con P = Q ya no cuentan.

> <> (Pez) y Python - 26 caracteres

"00gr00g:a9*2+$' tnirp'>o<

Genera este Python

print "\"00gr00g:a9*2+$' tnirp'>o<"

Python y Ruby, 39 personajes

Este fragmento de Python

s='puts %%q{s=%r;print s%%s}';print s%s

genera este fragmento de Ruby

puts %q{s='puts %%q{s=%r;print s%%s}';print s%s}

que luego genera nuevamente el fragmento de Python inicial:

$ diff -s mutualquine.py <(ruby <(python mutualquine.py))
Files mutualquine.py and /dev/fd/63 are identical

Tenga en cuenta que esto es similar a la respuesta de JB .

C y Perl, 73

Esta C:

main(s){printf(s="print q<main(s){printf(s=%c%s%c,34,s,34);}>",34,s,34);}

... genera el siguiente Perl:

print q<main(s){printf(s="print q<main(s){printf(s=%c%s%c,34,s,34);}>",34,s,34);}>

... que devuelve la C.

C y C ++, 123 caracteres

Este C (compilable con gcc v4.3.4):

#include <stdio.h>
main(){char *c="#include <stdio.h>%cmain(){char *c=%c%s%c;printf(c,10,34,c,34);}";printf(c,10,34,c,34);}

genera este (idéntico) C ++ (compilable con g ++ 4.3.4, una advertencia):

#include <stdio.h>
main(){char *c="#include <stdio.h>%cmain(){char *c=%c%s%c;printf(c,10,34,c,34);}";printf(c,10,34,c,34);}

Esto está dentro de las reglas publicadas. : P Y, como Ventero, esto se basa en la respuesta de JB .

Java a Python - 219

Java:

class Q{public static void main(String[]a){char q=34,c=39;String s="print%sclass Q{public static void main(String[]a){char q=34,c=39;String s=%s%s%s;System.out.printf(s,c,q,s,q,c);}}%s";System.out.printf(s,c,q,s,q,c);}}

Pitón:

print'class Q{public static void main(String[]a){char q=34,c=39;String s="print%sclass Q{public static void main(String[]a){char q=34,c=39;String s=%s%s%s;System.out.printf(s,c,q,s,q,c);}}%s";System.out.printf(s,c,q,s,q,c);}}'

Hace uso del hecho de que Python permite 'cadenas; esto hace que sea mucho más fácil escribir la fuente del programa java en el programa python.

Python + Piet one-liners: 417 caracteres + 7391 7107 ejecutando codeles

Este script de Python produce una imagen de 7393 x 2; el bloque 2x2 más a la derecha del cual es un "centinela" que termina el programa; así que no estoy contando esos; y la segunda fila es de otro modo blanca. Probablemente pueda seguir desarrollando el código piet usando cadenas de suma / resta / multiplicación en lugar del ingenuo algoritmo binario ... pero no quiero dar una solución a un rompecabezas futuro.

No voy a publicar la imagen aquí, debido a sus dimensiones ridículas. Si desea verlo, ejecute el código de Python y canalice la salida a un archivo .ppm. Luego, convierta el .ppm a .gif, y ejecute la salida en Rapapaing . (alternativamente, use un intérprete de Piet que no sea web y que asimile .ppm)

A='P=lambda A:reduce(lambda(D,H,B),P:(D[P/3:]+D[:P/3],H[P%3*2:]+H[:P%3*2],B+"".join("%i "%H[(D[0]/P)%2]for P in[1,2,4])),map(" A !        @    B".find,A),([1,3,2,6,4,5],[0,192,192,255,0,255],"P3 %i 2 255 "%(len(A)+2)))[2]+"255 "*4+"0 0 "+"255 "*len(A)*3+"255 0 0 "*2;B=lambda D:["@!%s","@@!%s!"][D%2]%B(D/2)if 1<D else"";print P("".join("A%sB"%B(ord(D))for D in"A=%s;exec A[:-13]"%`A`)+" ");exec A[:-13]';exec A[:-13]

editar: jugó un poco el piet al reducir el peso de Hamming de los nombres de variables.

menos golf pre-quine :

Esta es una versión anterior, antes de darme cuenta de que podía convertirla en una frase. Es marginalmente más fácil de entender. La función P traduce un conjunto de instrucciones especiales en Piet; y la función p toma un número entero y produce una secuencia de instrucciones para crear ese número entero en la pila. Solo estoy usando las instrucciones =,+,:,|, por lo que esto probablemente podría hacerse más eficiente ... pero me gusta tener un compilador Piet completo (de algún tipo) en la fuente.

s="""def P(s):
 l=len(s)+1;R="P3 %i 2 255 "%(l+2);C=[1,3,2,6,4,5];V=[0,192,192,255,0,255]
 for x in map("=|^+-*/%~>.,:@$?#!".find,"="+s):
  C=C[x//3:]+C[:x//3];V=V[x%3*2:]+V[:x%3*2]
  for i in [1,2,4]:R+="%i "%V[(C[0]//i)%2]
 return R+"255 "*4+"0 0 "+"255 "*l*3+"255 0 0 "*2
p=lambda x:[":+%s","::+%s+"][x%2]%p(x/2)if x/2 else""
print P("".join("|%s!"%k(ord(c))for c in "s="+`s`+";exec s[:-13]"))
exec s[:-13]"""
exec s[:-13]

/Brainf..k/, 6988 bytes

Brainfuck

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Pruébalo en línea!

Brain-Flak

(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()())(())(()())(()()()()()())(())(())(())(())(())(()())(())(()())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(())(())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(())(())(())(()())(())(()())(())(()())(())(()())(())(()())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()())(()())(()()()()()()()()()())(())(()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(())(()())(()())(()()()()()()())(()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()())(()())(())(()()()()()())(()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(()()()()()()()()()())(())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()())(())(()())(()()()()()()()()())(()())(()()()()()())(()()()()()()())(())(())(())(())(())(())(()())(())(()())(())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()())(()()()()()()())(())(())(())(())(()()()()()()()()()())(()()()()()()()()()()())(()())(())(())(())(())(()())(())(()())(())(()())(()())(()())(()()()()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(()())(()()()()()()()()()())(()()()()()()()()()()())(())(()())(()())(()())(()())(()()()()()())(()()()()()()())(()()()()()()()()()()())(()()()()()()()()()())(()()()()()()()()()()())(())(()()()()()()()())((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<++>-[<++>-[<+>-[<++++++++++++++>-[<++>-[<+++++++++++++++++++++++++++++>-[<++>-[<++++++++++++++++++++++++++++++>-[<++>-]]]]]]]]]]<.>>>>]}{}<>

Pruébalo en línea!

Brain-Flak podría pasar el tiempo en TIO.

Explicación

Próximamente.

Ruby y Python (393 + 413 = 806 caracteres)

Ligero cambio de esta respuesta mía. Definitivamente podría reducirse ya que simplemente codifiqué la entrada sin ninguna optimización.

Rubí (393 caracteres)

require 'json';s=%q[{"ruby":[" %q[","require 'json';s=##;j=JSON.load s;puts j[l='python'][1].sub('##',j[l][0].delete(' ')+s+j[l][2].delete(' '))"," ]"],"python":["' ''","import json,re;s=##;j=json.loads(s);l='ruby';print(re.sub('##',j[l][0].replace(' ','')+s+j[l][2].replace(' ',''),j[l][1],1))","' ''"]}];j=JSON.load s;puts j[l='python'][1].sub('##',j[l][0].delete(' ')+s+j[l][2].delete(' '))

Python (413 caracteres)

import json,re;s='''{"ruby":[" %q[","require 'json';s=##;j=JSON.load s;puts j[l='python'][1].sub('##',j[l][0].delete(' ')+s+j[l][2].delete(' '))"," ]"],"python":["' ''","import json,re;s=##;j=json.loads(s);l='ruby';print(re.sub('##',j[l][0].replace(' ','')+s+j[l][2].replace(' ',''),j[l][1],1))","' ''"]}''';j=json.loads(s);l='ruby';print(re.sub('##',j[l][0].replace(' ','')+s+j[l][2].replace(' ',''),j[l][1],1))

Python 2 a Befunge 98, 94 78

Nuevamente, haciendo uso de las dos formas de hacer cuerdas de Python:

Pitón:

s='<@,kM%c%cs=%c%s%c;print s%%(39,34,39,s,39,34)%c';print s%(39,34,39,s,39,34)

Befunge 98:

<@,kM'"s='<@,kM%c%cs=%c%s%c;print s%%(39,34,39,s,39,34)%c';print s%(39,34,39,s,39,34)"

El programa python formatea la cadena para que se incluya a sí mismo y a los caracteres para la comilla simple y doble.

El programa Befunge funciona así:

• <: mover hacia la izquierda y envolver. Entonces ahora ejecutamos los comandos de derecha a izquierda

• ": haz que cada personaje que encontremos sea empujado a la pila hasta que encontremos otro ", así que empujamos:

  )43,93,s,93,43,93(%s tnirp;'c%)43,93,s,93,43,93(%%s tnirp;c%s%c%=sc%c%Mk,@<'=s
  

  Que en realidad es solo el programa Python, invertido debido a la forma en que Befunge imprime (que es un bucle pop + print)

• 'M: empujar Ma la pila. Mtambién es el número 77, que es uno menos que el número de caracteres empujados a la pila por el "s.
• k: saca el valor superior de la pila ( M) y realiza la siguiente operación muchas veces, más una.
• ,: saca el valor superior de la pila e imprime el carácter.
• @: finaliza el programa.

Subcarga y Betaload , 16 bytes (no competitivos)

Subcarga:

(a(:^)*a(S)*S):^

Betaload:

((a(:^)*a(S)*S):^)S

Betaload es un superconjunto de Underload, por lo que podrían ser dos respuestas de Underload.

Esto no es competitivo porque Betaload se creó después de publicar este desafío.

Clipper y C (111 + 108 = 219 caracteres)

Clipper (111)

?'char*f="%c%cchar*f=%c%s%c;main(){printf(f,63,39,34,f,34,39,10);}%c%c";main(){printf(f,63,39,34,f,34,39,10);}'

C (108)

char*f="%c%cchar*f=%c%s%c;main(){printf(f,63,39,34,f,34,39,10);}%c%c";main(){printf(f,63,39,34,f,34,39,10);}

Esto es un poco una evasión porque:

1. el comando "imprimir" en Clipper es realmente simple: ?'foo':-)
2. Lo basé en la quine "clásica C" de http://www.nyx.net/~gthompso/quine.htm , con algunas modificaciones para exprimir los ?y 's.
3. No lo hice #include <stdio.h>, por lo que da una advertencia del compilador
4. La salida del código C de la versión Clipper tuvo que ser presionada para eliminar un salto de línea introducido por un límite de columna de 80 caracteres en mi terminal o en la rutina de impresión de Harbour o algo así.

Python y ~ - ~! - 77 y 81 = 158

Este código de Python:

q=chr(124);s='@%sq=chr(124);s=%s;print(s%%repr(s))%s:';print(s%(q,repr(s),q))

genera esto ~ - ~! código:

@|q=chr(124);s='@%sq=chr(124);s=%s;print(s%%repr(s))%s:';print(s%(q,repr(s),q))|:

Definitivamente se puede mejorar mucho, y adopta un montón de las otras respuestas.

Javascript y Windows .bat (71 y 81)

f=()=>{console.log('echo f='+(f+';f()').replace(/(?=[>^\\])/g,'^'))};f()

y

echo f=()=^>{console.log('echo f='+(f+';f()').replace(/(?=[^>^^^\^\])/g,'^^'))};f()