Specifier Reference Viewer

This is a UBT plugin that generates a list of all UPROPERTY, UFUNCTION, USTRUCT, UENUM, UMETA, UPARAM, UINTERFACE, and UDELEGATE specifiers based on their usage in the source for the engine, game, and all plugins.

For your convenience, I've included the generated output in this repo as specifiers.json. This file contains every specifier in use as of Unreal Engine 5.3.

At this time, it only exports to a JSON file. At some point in the future, I plan to integrate the result into the Unreal Editor in various ways.

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After installing the plugin, enable the plugin only for the Editor target in your .uproject.

{
    "Plugins": [
        {
            "Name": "SpecifierReferenceViewer",
            "Enabled": true,
            "TargetAllowList": [
                "Editor"
            ]
        }
    ]
}

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This exporter performs two separate tasks:

1. Finds all non-metadata specifiers by using reflection against the UHT.
2. Finds all metadata specifier usages by scanning each UObject parsed by the UHT, and then analyzes this usage data to determine the value type of each metadata specifier.