[YAML] Don't match controversial plain bools in keys #2566
Merged
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
YAML 1.1 made the prominent mistake of accepting many aliases for boolean values that many parsers adopted. For 1.2, these aliases have been removed, but for accuracy with the older version and especially
considering how older parsers are still seeing use, we cannot simply remove matching them.
However, the short names "y" and "on" are fairly common in keys and having those highlighted as a boolean is annoying, so we only match for the 1.2 scalars in keys.
I believe this solution to be a satisfactory compromise for #1602, where this issue has been discussed at length.
Closes #1602.