feat: support match_when_empty
for rule condition
#8809
+139
−18
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Summary
Closes #8267
Align with webpack https://github.com/webpack/webpack/blob/main/lib/rules/RuleSetCompiler.js#L237
Considering the
match_when_empty
is only calculated once andTryFrom
can't be async, I useRwLock
for cache. It's better to run benchmarks to see if there's performance regression.Checklist