[Issue 24817] UDA on nested template does not work

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24817

Adam D. Ruppe <destructionator at gmail.com> changed:

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                 CC|                            |destructionator at gmail.com

--- Comment #1 from Adam D. Ruppe <destructionator at gmail.com> ---
well i have a fix for it

idk what side effects it has. but in dmd's parse.d, it is line 4880ish in my
branch

search for the comment "A template parameter list means it's a function
template"

rn *above* that line is a block `if (udas) { ... }`

move that block to *below* that `if(tpl)` condition

so then it attaches to the wrapped template instead of the function it is
wrapping

passes all tests *there*. idk about other potential regressions, but it did
leave the udas accessible via the instance

and the code change passes my gut test- the parser is doing a rewrite but
attached udas before wrapping the template and now it attaches udas at the end

fixed in opend on next push at least lol

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