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from lexer import lex
from parser import parse
from interpreter import interpret
from exceptions import NebPanic
import sys
def debug(prev_lexed, prev_parsed):
if prev_lexed is not None:
acc = " ".join([f"{l}" for l in prev_lexed])
print(f" - LEX: {acc}")
if prev_parsed is not None:
acc = " ".join([f"{p}" for p in prev_parsed])
print(f" - PARSE: {acc}")
def repl():
print("### neb :)(:")
print("version: < 0")
idx = 1
prev_idx = 0
prev_lexed = None
prev_parsed = None
while True:
inp = input(f"#{idx}> ")
if len(inp.strip()) == 0:
continue
try:
if inp.strip() == "(debug)":
debug(prev_lexed, prev_parsed)
continue
lexed = lex(inp)
prev_lexed = lexed
parsed = parse(lexed)
prev_parsed = parsed
inter = interpret(parsed)
print(f"=> {inter}")
prev_idx = idx
idx += 1
except NebPanic as ne:
print(f"panic! {ne}")
except Exception as e:
print(f"exception! {type(e)} {e}")
def run_file(filename):
with open(filename, "r") as fil:
data = fil.read()
try:
lexed = lex(data)
parsed = parse(lexed)
ev = interpret(parsed)
except Exception as e:
print(f"panic! {e}")
if __name__ == "__main__":
if len(sys.argv) == 1:
repl()
elif len(sys.argv) >= 2:
run_file(sys.argv[1])
else:
print("usage: neb [<file>]")
sys.exit(1)
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