stjck

stjck is an esolang created by user:cleverxia. There are no typos here. It has 2 stacks, a IP stack and a data stack

Program flow

every program in queje consist of some commands that does two things: change the IP, and does someting to a stack. Popping an empty stack gives a random number in [0,IP) and it's the only way to get anything random. IP out of bounds wraps.

in the table below, pop() means pop from data stack and return the popped value

Caption text

command	meaning	what it does
_	advance/APLWSI	IP+=1
@	halt	halt
:	dup	pop stack top(let it be x),push x twice, then let IP=x
`	push	push IP to data stack, then IP+=1
_	discard	set IP to pop()
[	flag	push current IP to IP stack, then IP+=1
]	branch	set IP to IP stack top (pops)
? (wimpmode only)	condition	set IP to IP stack top (pops) if data stack top!=0 (also pops)
0~9	number	push the number (let it be X), then IP+=X (+1 if X==0)
+	add	IP+=pop()
-	sub	IP-=pop()
*	mul	IP*=pop()
/	div	IP/=pop() (integer divide, rounds to -inf, x/0=0)
%	mod	IP%=pop() (always positive, x%0=x)
<	output	a=pop(), output a as character, and set IP to it
>	input	input a character, push ASCII code to stack and set IP to it
)	rroll	roll the stack top to the bottom, and set IP to it
(	lroll	roll the stack bottom to the top, and set IP to it
$	swap	pop a, pop b, push a, push b, and set IP to b
'	char (wimpmode only)	let the next character's ascii be X. push X, and set IP to X

Examples

infinite loop

[]

truth machine

WIP