def __call__(self, *args):
import mage.reader as reader # Avoid circular imports.
expected_params = len(self.params)
received_args = len(args)
if expected_params != received_args:
err_fmt = 'fn takes exactly {} arguments ({} given)'
raise TypeError(err_fmt.format(expected_params, received_args))
fn_scope_sym = symbol.Symbol('fn__' + str(id(self)))
closure = Closure(fn_scope_sym, outer=self.outer)
for param, arg in zip(self.params, args):
v = closure.intern(param)
v.root = arg
return reader.eval(self.body, closure)
# Version message.
print "Mage 0.0.1\n"
while True:
try:
line = raw_input(str(repl_ns) + "=> ")
if line in ("exit", "quit"):
print "Bye for now!"
break
while unbalanced(line):
line += "\n" + raw_input(" " * len(str(repl_ns)) + ".. ")
# Evaluation involves three steps:
#
# 1. Tokenize a string.
# 2. Expand tokens. (Macro expansion, error checking.)
# 3. Eval expanded tokens.
parsed = reader.read_string(line)
expanded = reader.expand(parsed, repl_ns)
evaled = reader.eval(expanded, repl_ns)
if evaled is None:
print "nil"
else:
print evaled
except KeyboardInterrupt:
print "\n"
except Exception:
traceback.print_exc()
