def __init__(self, bindings=[], context=None):
self.bindings = []
if context is None:
context = _get_caller_globals()
self.parser = Parser(context)
for pattern, handler in bindings:
self.register(pattern, handler)
def match_args(pattern, context=None):
"""
Decorator for matching a function's arglist.
:param pattern: Pattern or str -- the pattern
:param context: dict -- an optional context for the pattern parser. If
absent, it defaults to the caller's `globals()`.
Usage:
>>> @match_args('head::tail')
... def do_something(head, tail):
... return (head, tail)
>>> do_something(1, 2, 3, 4)
(1, (2, 3, 4))
"""
if isinstance(pattern, _basestring):
if context is None:
context = _get_caller_globals()
pattern = Parser(context)(pattern)
def wrapper(function):
@wraps(function)
def f(*args):
match = pattern.match(args)
if not match:
raise NoMatch("%s doesn't match %s" % (pattern, args))
return function(**match.ctx)
return f
return wrapper
def __init__(self, bindings=[], context=None):
self.bindings = []
if context is None:
context = _get_caller_globals()
self.parser = Parser(context)
for pattern, handler in bindings:
self.register(pattern, handler)
def match_args(pattern, context=None):
"""
Decorator for matching a function's arglist.
:param pattern: Pattern or str -- the pattern
:param context: dict -- an optional context for the pattern parser. If
absent, it defaults to the caller's `globals()`.
Usage:
>>> @match_args('head::tail')
... def do_something(head, tail):
... return (head, tail)
>>> do_something(1, 2, 3, 4)
(1, (2, 3, 4))
"""
if isinstance(pattern, _basestring):
if context is None:
context = _get_caller_globals()
pattern = Parser(context)(pattern)
def wrapper(function):
@wraps(function)
def f(*args):
match = pattern.match(args)
if not match:
raise NoMatch("%s doesn't match %s" % (pattern, args))
return function(**match.ctx)
return f
return wrapper
def __call__(self, pattern, context=None):
if isinstance(pattern, _basestring):
if context is None:
context = _get_caller_globals()
pattern = Parser(context)(pattern)
return _UnpackerHelper(self.__dict__, pattern)
def __call__(self, pattern, context=None):
if isinstance(pattern, _basestring):
if context is None:
context = _get_caller_globals()
pattern = Parser(context)(pattern)
return _UnpackerHelper(self.__dict__, pattern)
