Method begin_body

mypyc/irbuild/for_helpers.py:716–724

(self)

        builder.add(Branch(self.next_reg, self.loop_exit, self.body_block, Branch.IS_ERROR))

    def begin_body(self) -> None:
        # Assign the value obtained from __next__ to the
        # lvalue so that it can be referenced by code in the body of the loop.
        builder = self.builder
        line = self.line
        # We unbox here so that iterating with tuple unpacking generates a tuple based
        # unpack instead of an iterator based one.
        next_reg = builder.coerce(self.next_reg, self.target_type, line)
        builder.assign(builder.get_assignment_target(self.index), next_reg, line)

    def gen_step(self) -> None:
        # Nothing to do here, since we get the next item as part of gen_condition().