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  r72912 | benjamin.peterson | 2009-05-25 08:13:44 -0500 (Mon, 25 May 2009) | 5 lines

  add a SETUP_WITH opcode

  It speeds up the with statement and correctly looks up the special
  methods involved.
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  r72920 | benjamin.peterson | 2009-05-25 15:12:57 -0500 (Mon, 25 May 2009) | 1 line

  take into account the fact that SETUP_WITH pushes a finally block
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  r72940 | benjamin.peterson | 2009-05-26 07:49:59 -0500 (Tue, 26 May 2009) | 1 line

  teach the peepholer about SETUP_WITH
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This commit is contained in:
Benjamin Peterson 2009-06-28 03:18:59 +00:00
parent d2397753ee
commit 876b2f286b
10 changed files with 105 additions and 84 deletions
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12
Doc/library/dis.rst
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@ -436,6 +436,18 @@ the stack so that it is available for further iterations of the loop.
by ``CALL_FUNCTION`` to construct a class.
.. opcode:: SETUP_WITH (delta)
This opcode performs several operations before a with block starts. First,
it loads :meth:`~object.__exit__` from the context manager and pushes it onto
the stack for later use by :opcode:`WITH_CLEANUP`. Then,
:meth:`~object.__enter__` is called, and a finally block pointing to *delta*
is pushed. Finally, the result of calling the enter method is pushed onto
the stack. The next opcode will either ignore it (:opcode:`POP_TOP`), or
store it in (a) variable(s) (:opcode:`STORE_FAST`, :opcode:`STORE_NAME`, or
:opcode:`UNPACK_SEQUENCE`).
.. opcode:: WITH_CLEANUP ()
Cleans up the stack when a :keyword:`with` statement block exits. TOS is