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| author | Benjamin Peterson <benjamin@python.org> | 2009-06-28 03:18:59 (GMT) |
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| committer | Benjamin Peterson <benjamin@python.org> | 2009-06-28 03:18:59 (GMT) |
| commit | 876b2f286b9af1a69846c84d1229014b2a885c97 (patch) | |
| tree | 1934d1ce119603a4ae7a0a37c01957a3ca2d17a2 /Doc/library/dis.rst | |
| parent | d2397753ee3d20579aa60b5e1c037e9e20db7ccb (diff) | |
| download | cpython-876b2f286b9af1a69846c84d1229014b2a885c97.zip cpython-876b2f286b9af1a69846c84d1229014b2a885c97.tar.gz cpython-876b2f286b9af1a69846c84d1229014b2a885c97.tar.bz2 | |
Merged revisions 72912,72920,72940 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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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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Diffstat (limited to 'Doc/library/dis.rst')
| -rw-r--r-- | Doc/library/dis.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst index 8d4d956..341beb5 100644 --- a/Doc/library/dis.rst +++ b/Doc/library/dis.rst @@ -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 |