Talk:Union type

union
This article seems to suggest that it is possible to have methods, static members, private and protected methods, and probably a few other things that I am forgetting, In C++ unions. As far as I know this is not the case, but I am not 100% certain of this. Can someone clarify in the article what features of structs are not possible for unions in C++.--King Mir 18:31, 29 April 2007 (UTC)
 * Static data members are allowed since C++11. Methods has always been allowed. 90.230.55.237 (talk) 09:50, 25 November 2019 (UTC)

Misconception
When you talk about union types, the first thing that pops up is the unions from C/C++, but there is such thing in the type theory of programming languages. Don't have any paper on hand, but the Types and Programming Languages by B. Pierce describes the intuitions, which is much general that it is in the current page — Preceding unsigned comment added by Hfehrmann (talk • contribs) 23:15, 19 December 2016 (UTC)

At most one member of a union can be active at any time
The section about C/C++ states: "The primary use of a union is allowing access to a common location by different data types, for example hardware input/output access, bitfield and word sharing, or type punning." This usage might be common but is not actually guaranteed to work according to the standard. I think it should at least be mentioned that this is either undefined behaviour or relying on extra guarantees given by the compiler. 90.230.55.237 (talk) 09:35, 25 November 2019 (UTC)

Scala 3 union types
I think Scala 3 union types should be mentioned somewhere, but if I understand correctly, they are neither union types nor tagged unions... Any ideas? — Chrisahn (talk) 18:46, 21 August 2022 (UTC)

India Education Program course assignment
This article was the subject of an educational assignment at College Of Engineering Pune supported by Wikipedia Ambassadors through the India Education Program&#32;during the 2011 Q3 term.&#32;Further details are available on the course page.

The above message was substituted from by PrimeBOT (talk) on 20:06, 1 February 2023 (UTC)