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| author | Antoine Pitrou <solipsis@pitrou.net> | 2008-12-18 11:06:25 (GMT) |
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| committer | Antoine Pitrou <solipsis@pitrou.net> | 2008-12-18 11:06:25 (GMT) |
| commit | f289ae6f01683689dfd07785c9617175b40aea91 (patch) | |
| tree | dd9a6f78817fcedbd95db286188507cf21a52bc0 /Doc/library | |
| parent | 621601a698a285a45231a6fd223db33566dcb842 (diff) | |
| download | cpython-f289ae6f01683689dfd07785c9617175b40aea91.zip cpython-f289ae6f01683689dfd07785c9617175b40aea91.tar.gz cpython-f289ae6f01683689dfd07785c9617175b40aea91.tar.bz2 | |
Merged revisions 67818 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r67818 | antoine.pitrou | 2008-12-17 01:38:28 +0100 (mer., 17 déc. 2008) | 3 lines
Issue #2183: Simplify and optimize bytecode for list comprehensions.
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Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/dis.rst | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst index 500b83f..ab06542 100644 --- a/Doc/library/dis.rst +++ b/Doc/library/dis.rst @@ -357,14 +357,25 @@ Miscellaneous opcodes. address to jump to (which should be a ``FOR_ITER`` instruction). -.. opcode:: SET_ADD () +.. opcode:: SET_ADD (i) - Calls ``set.add(TOS1, TOS)``. Used to implement set comprehensions. + Calls ``set.add(TOS1[-i], TOS)``. Used to implement set comprehensions. -.. opcode:: LIST_APPEND () +.. opcode:: LIST_APPEND (i) - Calls ``list.append(TOS1, TOS)``. Used to implement list comprehensions. + Calls ``list.append(TOS[-i], TOS)``. Used to implement list comprehensions. + + +.. opcode:: MAP_ADD (i) + + Calls ``dict.setitem(TOS1[-i], TOS, TOS1)``. Used to implement dict + comprehensions. + + +For all of the SET_ADD, LIST_APPEND and MAP_ADD instructions, while the +added value or key/value pair is popped off, the container object remains on +the stack so that it is available for further iterations of the loop. .. opcode:: LOAD_LOCALS () |