f7031c7aa9
This PR adds a `Unit` assumption to alternatives of the splitter that would otherwise not have arguments. This fixes #11211. In practice these argument-less alternatives did not cause wrong behavior, as the motive when used with `split` is always a function type. But it is better to be safe here (maybe someone uses splitters in other ways), it may increase the effectiveness of #10184 and simplifies #11220. The perf impact is insignificant in the grand scheme of things on stdlib, but the change is effective: ``` ~/lean4 $ build/release/stage1/bin/lean tests/lean/run/matchSplitStats.lean 969 splitters found 455 splitters are const defs ~/lean4 $ build/release/stage2/bin/lean tests/lean/run/matchSplitStats.lean 969 splitters found 829 splitters are const defs ``` |
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