Stacklan

Not to be confused with StackLang.

Stacklan

Paradigm(s)	imperative
Designed by	User:Rock_Pie
Appeared in	2026
Computational class	Unknown
Major implementations	Reference implementation
Influenced by	Brainfuck
File extension(s)	.stck

Stacklan (short for "Stack language") is a brainfuck derivative that, instead of a memory tape, uses a stack (and an 8-bit register referred to as 'reg').

Commands

Command	Description
>	Push 1 onto the stack
<	Pop and discard the topmost item on the stack
+	Add the topmost item on the stack with the one below it
-	Subtract the item below the topmost item on the stack with the topmost item
.	Output the (extended) ASCII character that corresponds to the value of the topmost character on the stack
,	Input an (extended) ASCII character and push its value on the stack (or push 0 on the stack if EOF)
[	Jump past the matching ] if the topmost item on the stack is 0
]	Jump back to the matching [ if the topmost item on the stack is nonzero
!	Swap the topmost item on the stack with 'reg'.
?	Pop the two topmost off of the stack, combine them into a 16-bit integer (topmost item is the high byte, second topmost item is the low byte), and use the result of that to address the item on the stack to swap with the then-third (now first) topmost item (stack indexing is zero-based) (for example: {1, 2, 3, 1, 0} -> {1, 3, 2})

Examples

See the external resources.

External resources

• Stacklan resources (spec, interpreter, and examples)