prog8/docs/source/todo.rst

====
TODO
====

- fix manderbrot compiler issue


- remove statements after an exit() or return
- fix warnings about that unreachable code?

- add a compiler option to not include variable initialization code (useful if the program is expected to run only once, such as a game)
  the program will then rely solely on the  values as they are in memory at the time of program startup.

- create real assembly routines for the bresenham line and circle code
- also add assembly routines in c64scr for drawing rectangles (filled/open)
- add these routines for bitmap screen modes as well
- add a turtle example once we have highres drawing routines

- aliases for imported symbols for example perhaps '%alias print = c64scr.print'
- option to load library files from a directory instead of the embedded ones





Memory Block Operations integrated in language?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

array/string memory block operations?

- vector inc/dec/add/sub/mul/div...?  (on array or string):
  ``arrayvar++ / arrayvar-- / arrayvar += 2 / arrayvar -= 2 / arrayvar *= 3 / arrayvar /= 3``

- array operations
  copy (from another array with the same length), shift-N(left,right), rotate-N(left,right)
  clear (set whole array to the given value, default 0)

- array operations ofcourse work identical on vars and on memory mapped vars of these types.

- strings: identical operations as on array.

For now, we have the ``memcopy`` and ``memset`` builtin functions.


More optimizations
^^^^^^^^^^^^^^^^^^

Add more compiler optimizations to the existing ones.

- on the language AST level
- on the final assembly source level
- can the parameter passing to subroutines be optimized to avoid copying?
- working subroutine inlining (taking care of vars and identifier refs to them)

Also some library routines and code patterns could perhaps be optimized further


Eval stack redesign? (lot of work)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The eval stack is now a split lsb/msb stack using X as the stackpointer.
Is it easier/faster to just use a single page unsplit stack?
It could then even be moved into the zeropage to greatly reduce code size and slowness.

Or just move the LSB portion into a slab of the zeropage.

Allocate a fixed word in ZP that is the TOS so we can always operate on TOS directly
without having to to index into the stack?


Bugs
^^^^
Ofcourse there are still bugs to fix ;)


Misc
^^^^

Several ideas were discussed on my reddit post
https://www.reddit.com/r/programming/comments/alhj59/creating_a_programming_language_and_cross/