Maniphest T292892

Function model: Introduce a Union generic type
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	DVrandecic
	Oct 9 2021, 3:01 AM

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Description

Introduce a generic type Union which takes two types T1 and T2 as the arguments and whose instances are valid if they are valid instances of either T1 or T2.

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		Status	Subtype	Assigned	Task
		Open		None	T282062 ZObject model: Add a key to Z3 to mark a key as optional
		Open		None	T290996 Support Optional Keys in Orchestrator
		Open		None	T314364 Use `data/definitions` Version of `Z983` and ` Z6984` Once We Have Unions
		Open		None	T396553 definitions: Update certain keys to use union types when they are available
		Open		None	T292892 Function model: Introduce a Union generic type
		Resolved		cmassaro	T294135 Run All Validation as WikiFunctions
		Open		None	T296326 Discuss How to Implement Unions
		Resolved		• AAssaf	T307699 Formalize the semantics of the function model

Event Timeline

DVrandecic created this task.Oct 9 2021, 3:01 AM

Jdforrester-WMF renamed this task from Union generic type to Function model: Introduce a Union generic type.Oct 13 2021, 4:25 PM

DVrandecic moved this task from To Triage to Phase η – Generic types on the Abstract Wikipedia team board.Oct 13 2021, 4:26 PM

DVrandecic edited projects, added Abstract Wikipedia team (Phase η – Generic types); removed Abstract Wikipedia team.

Jdforrester-WMF added a parent task: T290996: Support Optional Keys in Orchestrator.Oct 20 2021, 4:37 PM

Jdforrester-WMF closed subtask T294135: Run All Validation as WikiFunctions as Resolved.Oct 26 2021, 5:54 PM

DVrandecic moved this task from Incoming to Ready to do on the Abstract Wikipedia team (Phase η – Generic types) board.Oct 27 2021, 4:39 PM

cmassaro added a parent task: T290898: Implement (De)Serialization for Generic/Compound Types.Oct 27 2021, 4:49 PM

Jdforrester-WMF removed a parent task: T290898: Implement (De)Serialization for Generic/Compound Types.Nov 24 2021, 5:15 PM

Jdforrester-WMF added a subtask: T296326: Discuss How to Implement Unions.

Jdforrester-WMF edited projects, added Abstract Wikipedia team (Phase θ – Throttling); removed Abstract Wikipedia team (Phase η – Generic types).

Jdforrester-WMF added a parent task: T314364: Use `data/definitions` Version of `Z983` and ` Z6984` Once We Have Unions.Aug 4 2022, 2:43 PM

Jdforrester-WMF moved this task from Phase θ – Throttling to To triage: Nice-to-haves on the Abstract Wikipedia team board.Nov 21 2022, 8:23 PM

Jdforrester-WMF edited projects, added Abstract Wikipedia team; removed Abstract Wikipedia team (Phase θ – Throttling).

Jdforrester-WMF changed the status of subtask T296326: Discuss How to Implement Unions from Open to In Progress.Feb 15 2024, 5:05 PM

Jdforrester-WMF moved this task from To triage: Nice-to-haves to Upcoming Epics on the Abstract Wikipedia team board.Jun 5 2024, 4:54 PM

Aklapper changed the status of subtask T296326: Discuss How to Implement Unions from In Progress to Open.Apr 11 2025, 10:21 PM

DMartin-WMF mentioned this in T396553: definitions: Update certain keys to use union types when they are available.Jun 11 2025, 6:22 AM

Jdforrester-WMF added a project: Epic.Jan 14 2026, 6:56 PM

Jdforrester-WMF added a parent task: T396553: definitions: Update certain keys to use union types when they are available.

Jdforrester-WMF moved this task from Upcoming Epics to No current plans / External on the Abstract Wikipedia team board.Mar 11 2026, 8:16 PM