Class static variables

[Guillaume]

Axel understood perfectly the goal of my question and the way I would
like the code to behave.

> This alteration is actually easier for the class case, as has
> been pointed out, as long as, of course, __setattr__ knows
> about it.  For the variable case you'd HAVE to say global in
> each block that rebinds it (analogous to saying CA.a in an
> explicit way for the class field case, I guess).

So here is the code which seams to do what I want. The few tests I made
give good results. The only problem is the need to modify __setattr__
but it is not a problem for generated code (Java,C++,... -> Python)

The only problem will be for Python->Python... but first my tool doesn't
have a Python parser yet and second, I could mark special cases. Of
course the fact to change the semantic of attributes can be a problem if
someone want to maintain the generated code.

First I used constructs like if name=="x": but in fact the use of try:
makes it more general (no need to know the attribute name). Inheritance
seams to work.

If you know a better way, tell me.

Guillaume
This code will be released in Alma 0.26
http://www.memoire.com/guillaume-desnoix/alma/

#### CODE ####


class A:
	def __setattr__(self,name,value):
		print "A: set "+name+" %s" % value
		try:
			A.__dict__[name]
			A.__dict__[name]=value
			return None
		except KeyError:
			self.__dict__[name]=value

# static vars for A
A.x="XX"
A.w="WW"

class B(A):
	# instance vars for B
	z=None
	def __setattr__(self,name,value):
		print "B: set "+name+" %s" % value
		try:
			B.__dict__[name]
			B.__dict__[name]=value
			return None
		except KeyError:
			A.__setattr__(self,name,value)

# static vars for B
B.y="YY"

a=A()
b=B()

b.z="ZZ"

print b.z
print b.w

print a.x
a.x="XXXX"
print a.x
print b.y
b.y="YYYY"
print b.y
print b.x

try:
	print b.v
except AttributeError:
	print "v is not defined..."


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