[Issue 24718] New: [ImportC] typedef struct with name as a pointer cannot be used with struct name

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24718

          Issue ID: 24718
           Summary: [ImportC] typedef struct with name as a pointer cannot
                    be used with struct name
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: ImportC
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: schveiguy at gmail.com

imported.c:

typedef struct Foo {
   int x;
} *pFoo;

struct Bar {
   struct Foo foo;
};

main.d:
import imported;

Compiling main.d fails to build with the following message:

imported.c(6): Error: variable `testimportc.Bar.foo` - no definition of struct
`Foo`
imported.c(6):        see
https://dlang.org/spec/struct.html#opaque_struct_unions
imported.c(6):        perhaps declare a variable with pointer type `Foo*`
instead

Actually compiling imported.c with the D compiler succeeds!

Note that it *requires* a typedef to a pointer, with a struct name. Removing
the pointer, it works. Removing the typedef, it works.

Note that I discovered this on a Mac via ldc, but I believe this is not limited
to those.

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