><=> (LongFish) Interpreter by restruct

Cheat Sheet

Movement

x Change cursor directon randomly

! Skip the next instruction, moving 2 spaces instead of 1

? Pop 1 value of the stack, if it's 0 skip the next instruction and move forward 2 spaces.

z Push 2 valus onto the stack, corresponding to the current cursor position.

u Pop 2 values off the stack, and set them as the cursor direction.

k Push 2 values onto the stack, corresponding to the two axes of the current cursor direction.

No wonder the user's of this superset go insane.

. Pop 2 values of the stack then move to that position.

Literals

+-*% Pop 2 values of the stack then perform the given operation.

, Divide the top 2 values of the stack.

= Pop 2 values of the stack, push 1 if they are equal and 0 otherwise

)( Greater than, less than. Push 1 or 0 to the stack.

'" Enable or disable string parsing mode. In string parsing mode all characters are pushed to the stack instead of executed.

Stack

{} Shifts the entire stack left or right

r Reverse the stack

l Push the length of the stack to the stack

[ Pop N from the stack, then create a new stack containing the top N elements of the old stack.

] Go back to the previous stack, adding all elements of the top stack back to it.

IO

i read a character

Other

& If the register is empty, pop the top element of the stack and move it to the register. Else push the value of the register to the stack and then empty the register.

h Copies the data from the previous stack's register to the current stack's register.

y Copies the data from the current stack's register to the previous stack's register.

j If the register has a value in it, decrement the value. Else give a error.

q If the register has a value in it, increment the value. Else give a error.

g Pop the top 2 elements then push the code value at that position

p Pop a postion and a value from the stack, then write the character to that position in the code.

; Halt