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https://github.com/OPCFoundation/UA-.NETStandard.git
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Marc Schier
66be6731f4
## Summary Combines the compiled companion-model support from #4062 with the NodeState emission fixes already in this PR. The model source generator can now consume compiled companion `NodeSet2` models more reliably, while generated factories consistently target base `NodeState` members even when a generated subclass shadows them. ## Changes ### Compiled companion NodeSets - Add `OpcUaStateTypeIndex` and wire it through `ModelSourceGenerator` / `ModelCompilation` so standard (`ns=0`) node-state and method-state class names are resolved from referenced `Opc.Ua.Core(.Types)` metadata. - Add the model-generation-scoped `StandardMethodStateFallback`, which degrades an unresolved standard typed `*MethodState` reference to `global::Opc.Ua.MethodState` only when the type is neither available in the compilation nor declared by the current generation pass. - Keep declaration names outside the reference-only fallback policy, propagate fallback state through the logical execution context, reuse the immutable availability index, and use named incremental-generator inputs instead of deep `Left` / `Right` chains. - Escape generated fluent-builder XML documentation where browse names can contain XML-sensitive characters. ### Safe NodeState factory emission - Declare one base-typed `global::Opc.Ua.NodeState nodeState = state;` local per generated factory. - Use `nodeState` for base-member reads and writes to `NodeId`, `SymbolicName`, `BrowseName`, `DisplayName`, `Description`, `WriteMask`, `UserWriteMask`, `AccessRestrictions`, `ReleaseStatus`, `Categories`, `Specification` and `IsPartOfTypeHierarchy`. - Base-qualify the optional-child `previousNodeId` read, NodeId comparison, and existing-child NodeId update. - `global::`-qualify emitted `NodeId` / `ExpandedNodeId` namespace prefixes to avoid namespace collisions. ### Supporting updates - Expose `Opc.Ua.Types` internals to `Opc.Ua.Core.Encoders.Tests`. - Update generator assertions and add focused fallback regression coverage. ## Why Compiled companion models can instantiate standard types whose curated Core implementation does not expose the conventionally named typed method-state class. The scoped fallback lets those models generate without weakening the Stack generator or masking classes emitted by the current model. Separately, generated subclasses can shadow base `NodeState` properties with strongly typed `new` properties. Routing base attributes through a `NodeState`-typed local guarantees initialization reaches the intended base member while keeping generated code smaller and clearer than repeated casts. ## Validation - Full `Opc.Ua.SourceGeneration.Core.Tests` on net10.0: **3718 passed / 8 skipped / 0 failed**. - Combined focused generator coverage on net48: **21 passed / 0 failed**. - Full `Opc.Ua.SourceGeneration.Tests`: **68 passed / 0 failed**. - Full `Opc.Ua.SourceGeneration.Stack.Tests`: **90 passed / 0 failed**. ## Context This PR supersedes #4062 and contains both source-generator change sets. The companion-model fallback remains the scoped interim workaround tracked by #4060; a future upstream name-resolution step can remove it. These changes also feed the experimental data-encodings work in #4007. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>