• d-bugmail puremagic.com (56/56) Jan 21 2022 https://issues.dlang.org/show_bug.cgi?id=22694

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=22694

          Issue ID: 22694
           Summary: template mixin with UDA not recognized inside function
           Product: D
           Version: D2
          Hardware: All
               URL: http://dlang.org/
                OS: All
            Status: NEW
          Severity: minor
          Priority: P3
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: htvennik gmail.com

Given the following declarations

------------------
mixin template Foo(T)
{
    struct S
    {
        T a;
    }
}

enum myUda;
------------------

The following code does not compile:

------------------
int main()
{
     myUda
    mixin Foo!int;

    auto s = S(0);
    return s.a;
}
------------------

Error: found `Foo` when expecting `(` following `mixin`

However, the following two snippets compile successfully:

------------------
int main()
{
    mixin Foo!int;

    auto s = S(0);
    return s.a;
}
------------------
 myUda
mixin Foo!int;

int main()
{
    auto s = S(0);
    return s.a;
}
------------------

Looks like dmd fails to recognize a template mixin inside a function when it
has an UDA applied to it.

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