84 lines
1.7 KiB
Python
84 lines
1.7 KiB
Python
|
# test try-finally with return, where unwinding return has to go through
|
||
|
# another try-finally which may affect the behaviour of the return
|
||
|
|
||
|
# case where a simple try-finally executes during an unwinding return
|
||
|
def f(x):
|
||
|
try:
|
||
|
try:
|
||
|
if x:
|
||
|
return 42
|
||
|
finally:
|
||
|
try:
|
||
|
print(1)
|
||
|
finally:
|
||
|
print(2)
|
||
|
print(3)
|
||
|
print(4)
|
||
|
finally:
|
||
|
print(5)
|
||
|
print(f(0))
|
||
|
print(f(1))
|
||
|
|
||
|
# case where an unwinding return is replaced by another one
|
||
|
def f(x):
|
||
|
try:
|
||
|
try:
|
||
|
if x:
|
||
|
return 42
|
||
|
finally:
|
||
|
try:
|
||
|
print(1)
|
||
|
return 43
|
||
|
finally:
|
||
|
print(2)
|
||
|
print(3)
|
||
|
print(4)
|
||
|
finally:
|
||
|
print(5)
|
||
|
print(f(0))
|
||
|
print(f(1))
|
||
|
|
||
|
# case where an unwinding return is cancelled by an exception
|
||
|
def f(x):
|
||
|
try:
|
||
|
try:
|
||
|
if x:
|
||
|
return 42
|
||
|
finally:
|
||
|
try:
|
||
|
print(1)
|
||
|
raise ValueError # cancels any active return
|
||
|
finally:
|
||
|
print(2)
|
||
|
print(3)
|
||
|
print(4)
|
||
|
finally:
|
||
|
print(5)
|
||
|
try:
|
||
|
print(f(0))
|
||
|
except:
|
||
|
print('caught')
|
||
|
try:
|
||
|
print(f(1))
|
||
|
except:
|
||
|
print('caught')
|
||
|
|
||
|
# case where an unwinding return is cancelled then resumed
|
||
|
def f(x):
|
||
|
try:
|
||
|
try:
|
||
|
if x:
|
||
|
return 42
|
||
|
finally:
|
||
|
try:
|
||
|
print(1)
|
||
|
raise Exception # cancels any active return
|
||
|
except: # cancels the exception and resumes any active return
|
||
|
print(2)
|
||
|
print(3)
|
||
|
print(4)
|
||
|
finally:
|
||
|
print(5)
|
||
|
print(f(0))
|
||
|
print(f(1))
|