[Python-Dev] PEP 343 - next steps

[Nick Coghlan]

Nick Coghlan wrote:
> Then all the two new opcodes (e.g. ALLOW_ASYNC, BLOCK_ASYNC) would 
> have to do is set the state of tstate->allow_async_exc appropriately.

Actually, to allow the use of 'with' statements inside functions 
called via EXPR and the call to __enter__, it would be necessary to 
support nesting of calls to BLOCK_ASYNC and ALLOW_ASYNC, so a better 
approach would be to make the field "tstate->block_async_exc", 
incrementing it in BLOCK_ASYNC, and decrementing it in ALLOW_ASYNC.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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