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2ffbf6b112
- Use the compare nesting level and in-progress dictionary properly in PyObject_RichCompare(). - Change the in-progress code to use static variables instead of globals (both the nesting level and the key for the thread dict were globals but have no reason to be globals; the key can even be a function-static variable in get_inprogress_dict()). - Rewrote try_rich_to_3way_compare() to benefit from the similarity of the three cases, making it table-driven. - In try_rich_to_3way_compare(), test for EQ before LT and GT. This turns out essential when comparing recursive UserList instances; with the old code, these would recurse into rich comparison three times for each nesting level up to NESTING_LIMIT/2, making the total number of calls in the order of 3**(NESTING_LIMIT/2)! NOTE: I'm not 100% comfortable with this. It works for the standard test suite (which compares a few trivial recursive data structures only), but I'm not sure that the in-progress dictionary is used properly by the rich comparison code. Jeremy suggested that maybe the operation should be included in the dict. Currently I presume that objects in the dict are equal unless proven otherwise, and I set the outcome for the rich comparison accordingly: true for operators EQ, LE, GE, and false for the other three. But Jeremy seems to think that there may be counter-examples where this doesn't do the right thing. |
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| .. | ||
| .cvsignore | ||
| abstract.c | ||
| bufferobject.c | ||
| classobject.c | ||
| cobject.c | ||
| complexobject.c | ||
| dictobject.c | ||
| fileobject.c | ||
| floatobject.c | ||
| frameobject.c | ||
| funcobject.c | ||
| intobject.c | ||
| listobject.c | ||
| longobject.c | ||
| Makefile.in | ||
| methodobject.c | ||
| moduleobject.c | ||
| object.c | ||
| rangeobject.c | ||
| sliceobject.c | ||
| stringobject.c | ||
| tupleobject.c | ||
| typeobject.c | ||
| unicodectype.c | ||
| unicodeobject.c | ||
| unicodetype_db.h | ||
| xxobject.c | ||