Commits on Oct 29, 2024

1. Fix support for display hints being applied …

   While recent commit git-84be3ff resolved an issue with stacked textual
   conventions, it broke support for display hints, by changing the method
   resolution order (MRO) of types based on textual conventions. The
   orginal MRO was necessary for pysnmp to apply display hints.
   
   This commit replaces the previous solution with a new one. The new fix
   preserves the original MRO and also avoids subclassing the
   TextualConvention class multiple times for any type, thereby resolving
   both the original issue and the one newly introduced by git-84be3ff.
   
   This new fix does (necessarily) add to "recompilation creep": in order
   to know whether or not to subclass TextualConvention for a new type,
   information needs to be carried over between MIBs about whether imported
   types are simple types or textual conventions. That means that if one
   MIB is changed (e.g. by changing a type from simple to textual
   convention or vice versa), the MIBs importing that MIB may have to be
   recompiled as well. pysmi is not yet smart enough to know about that,
   and may therefore skip recompiling the importing MIBs, leading to a
   possible desynchronization. That same issue was already present for
   handling of DEFVALs as well.
   
   New tests are added to ensure that display hint information is indeed
   not only available, but also applied.
   
   Please note that this commit extends the pysmi JSON output format.

   

   dcvmoole committed Oct 29, 2024
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