Lift traversal out of folding projections #112
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Signed-off-by: Dimitry Solovyov <dimitry@solovyov.lv>
Signed-off-by: Dimitry Solovyov <dimitry@solovyov.lv>
Signed-off-by: Dimitry Solovyov <dimitry@solovyov.lv>
ilyin371
approved these changes
Jun 22, 2018
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This rewrite lifts traversals from single projections that start with a fold. This helps other rewriters to detect cases like
fold().unfold(), greatly simplifying some projections.coalesce-based null guards have been replaced withchoose-based, because of unexpected behavior of globalcoalescein some TCK corner cases.Unused alias removal has been fixed to not skip adjacent
assteps.