[PEAK] Error with RuleDispatch on Python 2.5

[Alain Poirier]

Hi,

Running this code with Python 2.5rc1 :

"""
import dispatch

@dispatch.generic()
def render(s):
    pass

class C:
    pass

@render.when("isinstance(s, C)")
def render(s):
    pass
"""

I've go the following traceback (same error with test_dispatch.py or 
test_parsing.py). Any idea how to solve this error ?

"""
Traceback (most recent call last):
  File "d.py", line 10, in <module>
    @render.when("isinstance(s, C)") 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 690, in when
    return self._decorate(cond) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 577, in _decorate
    cond = self.parseRule(cond,frame=frame) or cond
  File "<string>", line 10, in parseRule 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 440, in parseRule
    return self.parse(rule, frame.f_locals, frame.f_globals) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 323, in parse
    from dispatch.predicates import CriteriaBuilder 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/predicates.py", 
line 710, in <module>
    "expr in Call and expr.function is isinstance" 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 690, in when
    return self._decorate(cond) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 577, in _decorate
    cond = self.parseRule(cond,frame=frame) or cond
  File "<string>", line 10, in parseRule 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 440, in parseRule
    return self.parse(rule, frame.f_locals, frame.f_globals) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/functions.py", 
line 326, in parse
    return parse_expr(expr_string,builder) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/ast_builder.py", 
line 383, in parse_expr
    return build(builder, parser.expr(expr).totuple(1)[1]) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/ast_builder.py", 
line 378, in build
    return production[nodelist[0]](builder,nodelist) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/ast_builder.py", 
line 51, in com_binary
    return getattr(builder,opname)(items) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/predicates.py", 
line 611, in And
    return reduce(operator.and_,[build(self,expr) for expr in items]) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/ast_builder.py", 
line 378, in build
    return production[nodelist[0]](builder,nodelist) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/ast_builder.py", 
line 111, in comparison
    return builder.Compare(nodelist[1], results) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/predicates.py", 
line 597, in Compare
    right = ICriterion(Pointer(right.value)) 
File "/opt/python-2.5rc1/lib/python2.5/site-packages/RuleDispatch-0.5a0.dev_r2100-py2.5-linux-i686.egg/dispatch/strategy.py", 
line 541, in __new__
    self = int.__new__(cls,id(ob))
OverflowError: long int too large to convert to int
"""