BLI: Improve CPPType system.
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Authored by Jacques Lucke (JacquesLucke) on Nov 12 2022, 2:06 PM.

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Hans Goudey (HooglyBoogly)

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rBa6c822733ac7: BLI: improve CPPType system

Summary

Goals:

Support bidirectional type lookups. E.g. finding the base type of a field was supported, but not the other way around. This also removes the todo in get_vector_type. To achieve this, types have to be registered up-front.
Separate CPPType from other "type traits". For example, previously ValueOrFieldCPPType adds additional behavior on top of CPPType. Previously, it was a subclass, now it just contains a reference to the CPPType it corresponds to. This follows the composition-over-inheritance idea. This makes it easier to have self-contained "type traits" without having to put everything into CPPType.

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Repository: rB Blender

Event Timeline

Jacques Lucke (JacquesLucke) requested review of this revision.Nov 12 2022, 2:06 PM

Jacques Lucke (JacquesLucke) created this revision.

Harbormaster completed remote builds in B24621: Diff 57547.Nov 12 2022, 2:06 PM

https://builder.blender.org/admin/#/builders/136/builds/219

Merge branch 'master' into cpp-type-cleanup
cleanup

Harbormaster completed remote builds in B24622: Diff 57553.Nov 12 2022, 2:47 PM

Jacques Lucke (JacquesLucke) edited the summary of this revision. (Show Details)Nov 12 2022, 2:51 PM

Jacques Lucke (JacquesLucke) added a reviewer: Hans Goudey (HooglyBoogly).

The change makes sense, it seems a bit more flexible/generic now. My main question is why registering CPP types is an explicit step now (BKE_cpp_types_init etc.). Wasn't it done at compile time before?

To continue the inspiration from the "CPP" part of the name, what do you think about "value type" rather than "base type"? Just curious.

Previously, there was no registration. The CPPType of a specific type was generated on first use (CPPType::get<T>). However, to get e.g. the vector type based on the value type, the vector type has to be registered before the lookup.

Using "value" instead of "base" sounds reasonable.

Ah, okay, that makes sense.

This revision is now accepted and ready to land.Nov 12 2022, 6:15 PM

Closed by commit rBa6c822733ac7: BLI: improve CPPType system (authored by Jacques Lucke (JacquesLucke)). · Explain WhyNov 12 2022, 6:36 PM

This revision was automatically updated to reflect the committed changes.

Jacques Lucke (JacquesLucke) added a commit: rBa6c822733ac7: BLI: improve CPPType system.