def op_POP_BLOCK(self, inst, delitem=None):
blk = self.syntax_blocks.pop()
if delitem is not None:
delete = ir.Del(delitem, loc=self.loc)
self.current_block.append(delete)
if blk in self._block_actions:
del self._block_actions[blk]
def _patch_var_disposal(self, var_name, use_map, disposal_blocks):
"""
Insert ir.Del statements into each of the *disposal_blocks*
for variable *var_name*, at the appropriate points in the blocks.
"""
for b in disposal_blocks:
# Either this is an original use point and we will insert after
# that statement, or it's a computed one and we will insert
# at the beginning of the block.
stmt = use_map.get(b)
ir_block = self.blocks[b]
if stmt is None:
ir_block.prepend(ir.Del(var_name, loc=ir_block.loc))
else:
# If the variable is used in an exiting statement
# (e.g. raise or return), we don't insert anything.
if not stmt.is_exit:
ir_block.insert_after(ir.Del(var_name, loc=stmt.loc), stmt)
def test_del(self):
a = ir.Del(self.var_a.name, self.loc1)
b = ir.Del(self.var_a.name, self.loc1)
c = ir.Del(self.var_a.name, self.loc2)
d = ir.Del(self.var_b.name, self.loc1)
self.check(a, same=[b, c], different=[d])