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Mini Shell
Mini Shell
""" NormalizeException simplifies try blocks. """
from pythran.passmanager import Transformation
import gast as ast
class NormalizeException(Transformation):
'''
Transform else statement in try except block in nested try except.
>>> import gast as ast
>>> from pythran import passmanager, backend
>>> node = ast.parse("try:print('t')\\nexcept: print('x')\\n\
else: print('e')")
>>> pm = passmanager.PassManager("test")
>>> _, node = pm.apply(NormalizeException, node)
>>> print(pm.dump(backend.Python, node))
try:
print('t')
try:
print('e')
except:
pass
except:
print('x')
'''
# FIXME : The transformation is incorrect. Else statement should propagate
# exception
def visit_Try(self, node):
if node.orelse:
node.body.append(
ast.Try(
node.orelse,
[ast.ExceptHandler(None, None, [ast.Pass()])],
[], []
)
)
node.orelse = []
self.update = True
if node.finalbody:
node.body.extend(node.finalbody)
node.finalbody.append(ast.Raise(None, None))
self.update = True
node = ast.Try(
node.body,
[ast.ExceptHandler(None, None, node.finalbody)],
[], [])
node.finalbody = []
return node
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