errors when using `@tag` to give a type definition a tag value of its own type

[Book-reader]

in the following example the compiler gives the error Recursive definition of 'Test'

struct Test @tag("test", Test{})
{
  int x;
}

the same happens with enum Test @tag("test", Test.FOO) {FOO} but with another message saying 'Test' has no enumeration 'FOO'

in the below example the compiler crashes with the message FATAL ERROR Should be unreachable -> in sema_identifier_find_possible_inferred @ in /home/runner/work/c3c/c3c/src/compiler/sema_expr.c:946

def @Test(Foo val) = {};

enum Foo @tag("test", Foo.BAR)
{
  BAR,
  BAZ
}

fn void main() @Test(BAR)
{
}

this only happens when:

• a def is used to create an attribute that takes Foo as an argument
• the Foo definition is tagged with either one of its eumerations (Foo.BAR) or Foo{}
• anything is given the attribute that takes Foo as an argument, and the name of the enum type is inferred (BAR instead of Foo.BAR).

[lerno]

This should work correctly now.

[Book-reader]

It no longer crashes, thanks!