[llvm] [YAMLParser] Improve plain scalar spec compliance (PR #68946)

[Scott Linder via llvm-commits]

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@@ -1848,13 +1869,15 @@ bool Scanner::fetchMoreTokens() {
   if (*Current == ',')
     return scanFlowEntry();
 
-  if (*Current == '-' && isBlankOrBreak(Current + 1))
+  if (*Current == '-' && (isBlankOrBreak(Current + 1) || Current + 1 == End))
     return scanBlockEntry();
 
-  if (*Current == '?' && (FlowLevel || isBlankOrBreak(Current + 1)))
+  if (*Current == '?' && (Current + 1 == End || isBlankOrBreak(Current + 1)))
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slinder1 wrote:

I agree it is out of scope, at some point you will be fixing the whole world if you continue. Thank you for expanding the test base for the supported cases, it LGTM!

https://github.com/llvm/llvm-project/pull/68946