[SAOC 2025]improve importC Weekly Update 1

[Emmanuel]

Hello D community,

The past week, I worked on fixing compilation failures in importC 
involving struct delegated initializer.

     struct Foo {
         int x;
         int y;
     };

     struct Bar {
         struct Foo f;
     };

     struct Bar b = {.f.x = 3}; // Error: only 1 designator 
currently allowed for C struct field initializer
     struct Bar b2 = {
         .f.x = 3, // Error: only 1 designator currently allowed 
for C struct field initializer
         .f.y = 4,
     };

Issue report: https://issues.dlang.org/show_bug.cgi?id=23374

I researched into this issue and implemented a fix to it and has 
been successfully merged.

Link to PR: 
https://github.com/dlang/dmd/pull/21883#event-19812674196

Now, that importC code compiles fine and also has been tested.


Additionally, I came across some inconsistencies in the dlang 
spec on importC enum. it strictly indicated that enum expressions 
are typed as 'int'. and some of the examples in the language spec 
was not also correct. I submitted a fix to it which has also been 
merged.
PR: https://github.com/dlang/dlang.org/pull/4317#event-19832789696

In the next week, I will be working on fixing issues involving 
taking the address of compound literals.