# What happened to \`T?\`

**URL:** https://discourse.julialang.org/t/what-happened-to-t/25480
**Category:** Internals & Design
**Tags:** question
**Created:** [June 20, 2019, 11:28am UTC](https://discourse.julialang.org/t/what-happened-to-t/25480 "2019-06-20T11:28:59Z")
**Posts on this page:** 1
**Showing post:** 20

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### Author: ![Tamas\_Papp](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tamas_papp/32/25949_2.png) [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [June 21, 2019, 5:06am UTC](https://discourse.julialang.org/t/what-happened-to-t/25480/20 "2019-06-21T05:06:51Z")

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> [@ExpandingMan](#):
>
> I recall that @Tamas_Papp had some nice suggestion for an alternative

I can’t recall anything, sorry. In fact, I think I was _against_ any clever syntax, I find the explicit `Union{...}` much cleaner. For frequent application one can always define an alias.

> [@Aliases for Union{T, Nothing} and Union{T, Missing}?](https://discourse.julialang.org/t/aliases-for-union-t-nothing-and-union-t-missing/15402/11):
>
> I think that extensions don’t break 1.0, so in theory they would be OK. That said, I prefer Union{T, Missing} & similar. I am sure I would have a hard time remembering which of Maybe, Option, and other variants corresponds to which singleton (as the discussion demonstrates, this is not intuitive at all); just as I don’t remember precedence tables so I try to avoid relying on them.

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