Merge pull request #4149 from SciML/as/misc-system

AayushSabharwal · web-flow · commit 638a6681bc18 · 2026-01-13T20:47:52.000+05:30
feat: add `MiscSystemData` metadata key
diff --git a/lib/ModelingToolkitBase/src/ModelingToolkitBase.jl b/lib/ModelingToolkitBase/src/ModelingToolkitBase.jl
@@ -324,6 +324,7 @@ export AbstractCollocation, JuMPCollocation, InfiniteOptCollocation,
     CasADiCollocation, PyomoCollocation
 export DynamicOptSolution
 export MissingGuessValue
+export MiscSystemData
 
 const set_scalar_metadata = setmetadata
 
diff --git a/lib/ModelingToolkitBase/src/systems/system.jl b/lib/ModelingToolkitBase/src/systems/system.jl
@@ -16,6 +16,13 @@ abstract type MutableCacheKey end
 
 const MutableCacheT = Dict{DataType, Any}
 
+"""
+    $TYPEDEF
+
+Utility metadata key for adding miscellaneous/one-off metadata to systems.
+"""
+abstract type MiscSystemData end
+
 """
     $(TYPEDEF)
 
