wmax and wmin C funs could be turned into single macro
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 35/100
Research direction
Locate the C implementations of the wmax and wmin functions and compare their shared logic. Refactor the duplicated implementation around a single macro if appropriate, then run the existing data.table test suite to confirm both functions retain their behavior.
Written by the indexing model from the issue text.
Description
not a big fan of macros but couldn't we do something like and deduplicate wmin and wmax?
#define DEFINE_WINDOWFUN(fname, init_val, op)
DEFINE_WINDOWFUN(wmax, R_NegInf, >=)
DEFINE_WINDOWFUN(wmin, R_PosInf, <=)
Originally posted by @ben-schwen in https://github.com/Rdatatable/data.table/pull/7299#discussion_r2335734654
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