Add parentheses for TSTypeOperator

[onishi-kohei]

Prettier 2.8.2
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--parser typescript

Input:

a as (typeof node.children)!

Output:

a as typeof node.children!;

Expected behavior:

a as (typeof node.children)!

[fisker]

@spennine Your issue not related to this one, you must have different version of Prettier installed.

[spennine]

ty @fisker , we are seeing this using 2.8.2; 2.8.1 didn't exhibit this issue.

[fisker]

Your editor is running old version.

[thorn0]

I never saw code like this (as + !), but if the goal of the parens is to make the precedence of operators more visible, then it makes more sense to place them this way: (a as typeof node.children)!

[onishi-kohei]

I ran it and got the following.
Looks good as is.
Input:

(a as typeof node.children)!

Output:

(a as typeof node.children)! ;

[fisker]

This was proposed base on my comment #14042 (comment) I guess.
Let's close this since the code doesn't make sense.