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fvl
executable file
·45 lines (39 loc) · 939 Bytes
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fvl
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#!/usr/bin/env python
from forvelki.parser import parser
from forvelki.program import executor
from forvelki.error import ForvelkiError
import sys, readline
def execute_file(filename):
try:
f = file(filename)
src = f.read()
except IOError:
print>>sys.stderr, "unable to read file %s" % filename
sys.exit(1)
else:
pgm = parser.parse(src)
for result in pgm.execute():
print result
def interactive_interpreter():
ex = executor()
try:
while 1:
try:
line = raw_input("\033[35mfvl:\033[0m ")
pgm = parser.parse(line+"\n")
for instr in pgm:
ex.feed(instr)
except ForvelkiError as err:
print>>sys.stderr, "error:", err
except KeyboardInterrupt:
print
except EOFError:
print
if __name__ == "__main__":
if len(sys.argv) > 2:
print>>sys.stderr, "usage: %s filename" % sys.argv[0]
sys.exit(1)
if len(sys.argv) == 2:
execute_file(sys.argv[1])
else:
interactive_interpreter()