Adding GOTO statement into Python
GOTO Considered harmful by Edgar Dijkstra
"Your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should." - That JURASSIC PARK guy
You guys remember basic.
Just what it sounds like, a decorator that patches the bytecode of a decorated function to allow variable assignments to specific string constants to be treated as GOTO/JUMP statements and LABELS to jump to.
Just in case it needs to be said, yes this is a joke and has no actual uses, nor should anyone use it for anything real other than having fun.
All relevant code in main.py.
Use:
some_func():
pass # << Do regular stuff
pass
pass
x = "#GOTO_mylabel" # << This is the goto statement, var name does not matter,
# statement has to be a string const,
# starting with keyword #GOTO_ after that label name
pass
pass
pass # << Do more regular stuff, of course after patching
# the goto statemet will skip right over this secion
x = "#GOTOLABEL_mylabel" # << This is the LABEL we will that will be jumped to
pass
pass # << Keep doing stuff
You should be able to define as many jumps and labels as desired, mutator will build a map and patch in jumps.
Live REPL demo here: https://replit.com/@HristoGueorguie/Adding-GOTO-statement-to-Python-cue-eveil-laughter.
Links to refs:
https://rushter.com/blog/python-bytecode-patch/ - Patching bytecode article by Artem Golubin
https://www.aosabook.org/en/500L/a-python-interpreter-written-in-python.html - Python Interpreter in Python article by Allison Kaptur