CDILOI

CDILOI (Concatenate, Delete, If, Label, Output, Input) is an esolang by User:ChuckEsoteric08 which was inspired by Gray Snail.

Specification

CDILOI uses unbounded variables to store data. The language is case-insensitive. Note that, because it uses whitespaces to split arguments, strings can't contain these separators.

@x returns value of the variable x. If a variable with that name doesn't exist, then create it and set its initial value to the empty string. It would not work if it is z in CONC, y or z in DEL, x in LBL, z in IF or x in INP

CONC x y z

Concatenate the strings x and y and store the result in the variable z.

DEL x y z

Remove the first character in the string x and store it in the variable y, and store everything else in the variable z.

IF x y z

If the strings x and y are equal goto label z.

LBL x

Declare the label x.

OUT x

Output the string x.

INP x

Store the user input in the variable x.

Examples

Hello, World!

OUT Hello,World!

Cat

INP x
OUT @x

Reverse Cat

INP x
LBL notempty
DEL @x char x
CONC @char @out out
IF @y @x end
IF a a notempty
LBL end
OUT @out

Unary counter

LBL count
CONC @x * x
OUT @x
IF a a count

Truth-machine

OUT Please_input_0_or_1:
INP choice
IF @choice 0 input_of_zero
IF @choice 1 input_of_one
LBL input_of_one
  OUT @choice
  IF @choice @choice input_of_one
LBL input_of_zero
  OUT @choice

Interpreter

• Common Lisp implementation of the CDILOI programming language.