[TableGen] Enhance !range bang operator #66489
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We add a third argument `step` to `!range` bang operator to make it with the same semantics as `range` in Python. `step` can be negative. `step` is 1 by default and `step` can't be 0. If `start` < `end` and `step` is negative, or `start` > `end` and `step` is positive, the result is an empty list.
Add more examples in doc
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To simplify some code. This PR is stacked on llvm#66489.
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Sep 29, 2023
We add a third argument `step` to `!range` bang operator to make it with the same semantics as `range` in Python. `step` can be negative. `step` is 1 by default and `step` can't be 0. If `start` < `end` and `step` is negative, or `start` > `end` and `step` is positive, the result is an empty list.
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We add a third argument
stepto!rangebang operator to make itwith the same semantics as
rangein Python.stepcan be negative.stepis 1 by default andstepcan't be0. If
start<endandstepis negative, orstart>endand
stepis positive, the result is an empty list.