Pointstack

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Pointstack is an esoteric programming language created by User:catto.4 in 2024. It is similar to brainfuck, except that it uses a stack instead of a tape. Items on the stack can only contain numbers.

Commands

Symbol	Explanation
!	Pushes a 0 to the top of the stack.
^	Increments the top value on the stack.
_	Decrements the top value on the stack.
+	Adds the top two values on the stack and pushes the result.
-	Subtracts the top two values on the stack and pushes the result.
*	Multiplies the top two values on the stack and pushes the result.
/	Divides the top two values on the stack and pushes the result.
.	Pops the top value on the stack and prints it.
,	Takes one byte of input as an ASCII character and pushes it to the top of the stack.
:	Duplicates the top value on the stack.
$	Swaps the top two values on the stack.
?	Pops and discards the top value on the stack.
[	Marks the start of a loop.
]	If the top value on the stack is a 0, continue. Otherwise, jump back to the matching [.
=	If the top two values on the stack are equal, discard those values and push a 1. Else, push a 0.
~	If the top two values on the stack are not equal, discard those values and push a 1. Else, push a 0.
`	If the top value on the stack is a 0, then skip the next command.
\	If the top value on the stack is a 1, then skip the next command.

Examples

Hello World

Outputs "Hello World".

!^^^^^^^^!^^^^^^^^^*.
!^^^^^^^^^^!^^^^^^^^^^*^.
!^^^^^^^^^!^^^^^^^^^^^^*:..
!^^^^^^^^^^^!^^^^^^^^^^*^.
!^^^^^^^^!^^^^*.
!^^^^^^^^!^^^^^^^^^^^*_.
!^^^^^^^^^^^!^^^^^^^^^^*^.
!^^^^^^^!^^^^^^^^^^^^^^^^*^^.
!^^^^^^^^^!^^^^^^^^^^^^*.
!^^^^^^^^^^!^^^^^^^^^^*.

Cat program

Takes one character and outputs it.

,.

Computational class

Pointstack's computational class is currently unknown.

Interpreter

There is currently no interpreter for Pointstack.