def throw(ctx, *args, **kwds):
# Already triggered
if ctx.trigger:
raise StopIteration
ctx.trigger = True
#raise args
if args:
#type, value=None, traceback=None = args
type, value, traceback = (lambda type, value=None, traceback=None: (type, value, traceback))(*args)
try:
raise type, value, traceback
except:
pass
import traceback
ctx.traceback = untwisted.final(untwisted.partial(sys.stderr.write, ''.join(traceback.format_stack(sys._getframe().f_back)) + traceback.format_exc()))
ctx.args = args
ctx.kwds = kwds
ctx.propagate()
return ctx
def throw(ctx, *args, **kwds):
# Already triggered
if ctx.trigger:
raise StopIteration
ctx.trigger = True
#raise args
if args:
#type, value=None, traceback=None = args
type, value, traceback = (lambda type, value=None, traceback=None:
(type, value, traceback))(*args)
try:
raise type, value, traceback
except:
pass
import traceback
ctx.traceback = untwisted.final(
untwisted.partial(
sys.stderr.write,
''.join(traceback.format_stack(sys._getframe().f_back)) +
traceback.format_exc()))
ctx.args = args
ctx.kwds = kwds
ctx.propagate()
return ctx
def propagate(ctx):
while True:
try:
callback = ctx.callback.pop(0)
# No callback
except IndexError:
return ctx
if isinstance(callback, promise):
# Already triggered
if hasattr(callback, 'args'):
raise StopIteration
callback.trigger = True
try:
callback.traceback = ctx.traceback
del ctx.traceback
# Don't worry about callback.traceback: Can't be without .args
except AttributeError:
pass
callback.args = ctx.args
ctx.args = callback,
callback.kwds = ctx.kwds
ctx.kwds = {}
if ctx.callback:
callback.propagate()
# Tail call optimization
else:
ctx = callback
continue
# Skip if callback has no .throw()
if hasattr(ctx, 'traceback'):
try:
callback = callback.throw
except AttributeError:
continue
ctx.traceback.cancel()
del ctx.traceback
args = ctx.args
del ctx.args
kwds = ctx.kwds
del ctx.kwds
try:
result = callback(*args, **kwds)
except:
ctx.traceback = untwisted.final(untwisted.partial(sys.stderr.write, ''.join(traceback.format_stack(sys._getframe().f_back)) + traceback.format_exc()))
ctx.args = sys.exc_info()
ctx.kwds = {}
continue
if isinstance(result, promise):
# Tail call optimization
#result.then(ctx)
try:
ctx.traceback = result.traceback
del result.traceback
# Don't worry about ctx.traceback: del above
except AttributeError:
pass
try:
ctx.args = result.args
result.args = ctx,
ctx.kwds = result.kwds
result.kwds = {}
# Not yet triggered
except AttributeError:
result.callback.append(ctx)
return ctx
continue
ctx.args = result,
ctx.kwds = {}
def propagate(ctx):
while True:
try:
callback = ctx.callback.pop(0)
# No callback
except IndexError:
return ctx
if isinstance(callback, promise):
# Already triggered
if hasattr(callback, 'args'):
raise StopIteration
callback.trigger = True
try:
callback.traceback = ctx.traceback
del ctx.traceback
# Don't worry about callback.traceback: Can't be without .args
except AttributeError:
pass
callback.args = ctx.args
ctx.args = callback,
callback.kwds = ctx.kwds
ctx.kwds = {}
if ctx.callback:
callback.propagate()
# Tail call optimization
else:
ctx = callback
continue
# Skip if callback has no .throw()
if hasattr(ctx, 'traceback'):
try:
callback = callback.throw
except AttributeError:
continue
ctx.traceback.cancel()
del ctx.traceback
args = ctx.args
del ctx.args
kwds = ctx.kwds
del ctx.kwds
try:
result = callback(*args, **kwds)
except:
ctx.traceback = untwisted.final(
untwisted.partial(
sys.stderr.write,
''.join(traceback.format_stack(
sys._getframe().f_back)) + traceback.format_exc()))
ctx.args = sys.exc_info()
ctx.kwds = {}
continue
if isinstance(result, promise):
# Tail call optimization
#result.then(ctx)
try:
ctx.traceback = result.traceback
del result.traceback
# Don't worry about ctx.traceback: del above
except AttributeError:
pass
try:
ctx.args = result.args
result.args = ctx,
ctx.kwds = result.kwds
result.kwds = {}
# Not yet triggered
except AttributeError:
result.callback.append(ctx)
return ctx
continue
ctx.args = result,
ctx.kwds = {}
