DBFV!

DBFV! is an esoteric programming language by User:David.werecat where each line of code is a separate function.

Instructions

Instruction	Description
x:[]	Defines a loop for x not zero
x:()	Defines a loop for x is zero
x<n	Sets x to equal n
x>	Outputs the ascii value of x
!n	Jumps to function n
~n	Calls function n
^	Returns from a call
x+	Increments x
x-	Decrements x
>x	Reads a value and stores in x
x%	Skips the next instruction if x not zero
x&	Skips the next instruction if x is zero
+n	Skips n characters ahead in the line
x|n	Swaps the values in x and n
.x	Sets x to zero
*xn	Adds n to x
$n	Ends the program and returns n
n/	Pushes n into stack 1
/x	Pops stack 1 and puts in x
n\	Pushes n into stack 2
\x	Pops stack 2 and puts in x
@text@	Defines a comment

In the examples, x and n are registers. Registers are defined as A-Z (uppercase) and store a single wrapping byte of data. n can also be an immediate constant, which is a number from 0-9. Whenever the instruction to be skipped is a loop, the entire loop is skipped.

Computational class

The following translation rules from Brainfuck show that DBFV! is Turing-complete.

brainfuck	DBFV!
begin	0\.X
>	X/\E+E0\0\\X
<	X\4\/X
+	X+
-	X-
.	X>
,	>X
[	X:[
]	]
end	$0

External resources

• Visual Basic .NET interpreter and sample programs