| 2 | CO_VARKEYWORDS = 0x0008 |
| 3 | |
| 4 | class Curry: |
| 5 | def __init__(self, f): |
| 6 | self.hasv = f.func_code.co_flags & CO_VARARGS |
| 7 | self.hask = f.func_code.co_flags & CO_VARKEYWORDS |
| 8 | self.defaults = f.func_defaults or () |
| 9 | self.defnum = len(self.defaults) |
| 10 | self.f = f |
| 11 | self.argnum = f.func_code.co_argcount |
| 12 | self._reset() |
| 13 | def __call__(self, *a, **k): |
| 14 | if k and not self.hask: |
| 15 | raise TypeError, "%s got unexpected keyword argument '%s'" %\ |
| 16 | (self.f.__name__, k.popitem()[0]) |
| 17 | kargs = self.kargs |
| 18 | args = self.args |
| 19 | kargs.update(k) |
| 20 | totlen = len(args) + len(a) |
| 21 | if totlen > self.argnum: |
| 22 | if not self.hasv: |
| 23 | raise TypeError, "%s takes exactly %d argument%c (%d given)" % (self.f.__name__, self.argnum, ['s',''][self.argnum==1], totlen) |
| 24 | args += a |
| 25 | self._reset() |
| 26 | return self.f(*args, **kargs) |
| 27 | if totlen >= self.argnum - self.defnum: |
| 28 | num_defaults = totlen - defnum |
| 29 | args += a + self.defaults[defnum-num_defaults:] |
| 30 | self._reset() |
| 31 | return self.f(*args, **kargs) |
| 32 | self.args += a |
| 33 | return self |
| 34 | def _reset(self): |
| 35 | self.args, self.kargs = (), {} |