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This is still a work in progress. It may be changed in the future.
This article is a stub, which means that it is not detailed enough and needs to be expanded. Please help us by adding some more information.

Fold is a unimplemented language devised by user:moon.

Instruction set

  1. >: Move the memory pointer to the left
  2. <: Move the memory pointer to the right
  3. &: Start a fold in the direction of the instruction pointer, will end at contacting a seam, anything under the fold is incremented, a fold moves along at one cell per tick
  4. *: Creates a seam at the location of the memory pointer
  5. $: Creates a loop in the program tape, ends at @, the loop goes in the direction that the program pointer is moving in
  6.  !: Flips the direction of the memory pointer
  7.  ?: Skips the next instruction if the value under the memory pointer is not 0
  8. ^: Cuts a loop, allowing the execution of the program to continue normally
  9. @: Marker for $, doesnt do anything unless linked to a loop, in which it moves the program pointer back to the loop it is linked to
  10. .: Patches a seam, if existent, at the location of the memory pointer;
  11.  :: print the value under the memory pointer
  12. (: undoes a fold if the memory pointer is on the start point of a fold
  13.  ;: Get input and put it under the memory pointer
  14. #: Branches the code and the child skips the next instruction
  15. ~: Ends execution

Minimal Examples

$>#&@ this is a infinite incrementer, acting like [0,1..] the Haskell equivalent to it

More info later