delta/cpython.git/Include/opcode.h, branch v2.5b2

PEP 343 -- the with-statement.

2006-02-27T22:32:47+00:00

This was started by Mike Bland and completed by Guido
(with help from Neal).

This still needs a __future__ statement added;
Thomas is working on Michael's patch for that aspect.

There's a small amount of code cleanup and refactoring
in ast.c, compile.c and ceval.c (I fixed the lltrace
behavior when EXT_POP is used -- however I had to make
lltrace a static global).

Install two code generation optimizations that depend on NOP.

2004-06-21T16:31:15+00:00

Reduces the cost of "not" to almost zero.

SF patch #910929: Optimize list comprehensions

2004-03-07T07:31:06+00:00

Add a new opcode, LIST_APPEND, and apply it to the code generation for
list comprehensions.  Reduces the per-loop overhead by about a third.

Revert the previous enhancement to the bytecode optimizer.

2003-04-24T05:45:23+00:00

The additional code complexity and new NOP opcode were not worth it.

Improved the bytecode optimizer.

2003-04-22T06:49:11+00:00

* Can now test for basic blocks.
* Optimize inverted comparisions.
* Optimize unary_not followed by a conditional jump.
* Added a new opcode, NOP, to keep code size constant.
* Applied NOP to previous transformations where appropriate.

Note, the NOP would not be necessary if other functions were
added to re-target jump addresses and update the co_lnotab mapping.
That would yield slightly faster and cleaner bytecode at the
expense of optimizer simplicity and of keeping it decoupled
from the line-numbering structure.

Further SET_LINENO reomval fixes. See comments in patch #587933.

2002-08-30T13:09:51+00:00

Use a slightly different strategy to determine when not to call the line
trace function.  This removes the need for the RETURN_NONE opcode, so
that's gone again.  Update docs and comments to match.

Thanks to Neal and Armin!

Also add a test suite.  This should have come with the original patch...

This is my patch

2002-08-15T14:59:02+00:00

[ 587993 ] SET_LINENO killer

Remove SET_LINENO.  Tracing is now supported by inspecting co_lnotab.

Many sundry changes to document and adapt to this change.

The opcode FOR_LOOP no longer exists.

2002-06-13T17:59:51+00:00

Patch #494783: Rename cmp_op enumerators.

2002-01-01T19:59:11+00:00

Implement PEP 238 in its (almost) full glory.

2001-08-08T05:00:18+00:00

This introduces:

- A new operator // that means floor division (the kind of division
  where 1/2 is 0).

- The "future division" statement ("from __future__ import division)
  which changes the meaning of the / operator to implement "true
  division" (where 1/2 is 0.5).

- New overloadable operators __truediv__ and __floordiv__.

- New slots in the PyNumberMethods struct for true and floor division,
  new abstract APIs for them, new opcodes, and so on.

I emphasize that without the future division statement, the semantics
of / will remain unchanged until Python 3.0.

Not yet implemented are warnings (default off) when / is used with int
or long arguments.

This has been on display since 7/31 as SF patch #443474.

Flames to /dev/null.