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This is the same as the Flags choice but the property (if any) has the
DROP flag set.
This means that when filtering, the property is dropped when one side
is missing the property. Otherwise, the flags are AND-ed together with a
negotiation failure when the result if 0.
This can be used to make sure both sides present compatible feature bits.
The result of the filter is then:
1. no property (one side didn't present bits). This is likely because
the other side is old and doesn't know about the feature bits yet.
Code can take a backwards compatibility codepath.
2. a negotiation failure, both sides presented bits but the AND is 0,
they don't have compatible features.
3. a property with bits (features) that are compatible.
This is different from normal flags in that the flags are not dropped
when the other size is missing the property.
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|---|---|---|
| .. | ||
| body.h | ||
| builder.h | ||
| command.h | ||
| compare.h | ||
| dynamic.h | ||
| event.h | ||
| filter.h | ||
| iter.h | ||
| parser.h | ||
| pod.h | ||
| simplify.h | ||
| vararg.h | ||