Dumb idea?

Peter Hunt floydophone at gmail.com
Tue Jun 10 17:06:29 CEST 2008


Hi everyone -

I like playing around with language syntax and semantics. I'm thinking
about pulling down the PyPy code and messing around to see what I can
accomplish. My first idea is most succinctly described by example:

class IBlockProtocol:
    def __block__(self, func):
        # NO RETURN VALUES!
        pass

# my_IBlockProtocol is an expression that evaluates to an implementor
of IBlockProtocol

my_IBlockProtocol: expr

# becomes:

my_IBlockProtocol.__block__(lambda: expr)

###

my_IBlockProtocol<param1, paramN>: expr

# becomes:

my_IBlockProtocol.__block__(lambda param1, paramN: expr)

###

my_IBlockProtocol:
    stmt1
    stmt2

# becomes:

def anon():
    stmt1
    stmt2

my_IBlockProtocol.__block__(anon)

###

my_IBlockProtocol<param1, paramN>:
    stmt1
    stmt2

# becomes:

def anon(param1, paramN):
    stmt1
    stmt2

my_IBlockProtocol.__block__(anon)

###############

Has this already been done? Is it a stupid idea? I think it could be
used to simplify event handling and some Twisted stuff. I'm mainly
looking for reasons why I _wouldn't_ want to take the time to get my
hands dirty with the PyPy code (or even CPython) and try to implement
this syntax.

Thanks.

Pete



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