[Issue 20054] New: getSymbolsByUDA no longer works on modules

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20054

          Issue ID: 20054
           Summary: getSymbolsByUDA no longer works on modules
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: regression
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: zorael at gmail.com

I use this heavily to iterate module-level functions[1].

import std.traits;

struct UDA;

@UDA
void foo() {}

void main()
{
    alias funs = getSymbolsByUDA!(mixin(__MODULE__), UDA);
}

> C:\cygwin\home\zorael\work\result\bin\..\import\std\traits.d(8356): Error: template instance `isAggregateType!(uda)` does not match template declaration `isAggregateType(T)`
> uda.d(10):        while looking for match for `getSymbolsByUDA!(uda, UDA)`

Offending commit:

commit f07517ac648a933d998bc6a53af7dc55c9d48daf
Author: The Dlang Bot <code+dlang-bot at dawg.eu>
Date:   Wed Jul 10 11:57:39 2019 +0200

    phobos: Merge pull request #7100 from RazvanN7/fix_issue_19105

    https://github.com/dlang/phobos/pull/7100

    Fix Issue 19105 - Bogus recursive template expansion via getSymbolsByUDA
    merged-on-behalf-of: Nicholas Wilson
<thewilsonator at users.noreply.github.com>

[1]:
https://github.com/zorael/kameloso/blob/25cee1b7/source/kameloso/plugins/common.d#L955

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