[Issue 13222] New: Interface generation does not include auto for return type

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13222

          Issue ID: 13222
           Summary: Interface generation does not include auto for return
                    type
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: trivial
          Priority: P1
         Component: DMD
          Assignee: nobody at puremagic.com
          Reporter: alphaglosined at gmail.com

Given code (from Vibe.d vibe.internal.meta.funcattr):

auto before(alias Hook)(string parameter_name)
{
    return InputAttribute!Hook(parameter_name);
}

The given code will outputted for -op -Hd

before(alias Hook)(string parameter_name)
{
    return InputAttribute!Hook(parameter_name);
}

Which is not syntactically correct and will not compile.

Which gives errors such as, if it were to be on the import path and used:
P:\test2\static\routes\test2.d P:\test2\bin\bininfo.d
P:\test2\deps\imports\static\vibe\internal\meta\funcattr.di(4): Error:
unexpected ( in declarator
P:\test2\deps\imports\static\vibe\internal\meta\funcattr.di(5): Error: no
identifier for declarator before(string parameter_name)
Assertion failure: 'ident' on line 144 in file 'dsymbol.c'

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