[5.0][incrParse] A couple of fixes for incrParse #20391
Merged
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Cherry-pick of a couple of fixes for incremental parsing.
Skip missing node in getNextNode() [incrParse] Skip missing node in SyntaxData::getNextNode() #19951
Taking Missing node into account confuses reusability checking in incremental parsing.
rdar://problem/45215049 https://bugs.swift.org/browse/SR-8976
rdar://problem/45287031 https://bugs.swift.org/browse/SR-9006
Fix SyntaxParsingCache::translateToPreEditPosition() [incrParse] Fix SyntaxParsingCache::translateToPreEditPosition() #20321
If the position is in the region that is inserted by the edits, 'pre-edit' position shouldn't exist. So we cannot reuse the node at the position.
rdar://problem/45259469 https://bugs.swift.org/browse/SR-8995