transpile: import struct/union names when creating their literals

Author: fw-immunant

c2rust-transpile/src/translator/literals.rs

@@ -334,6 +334,10 @@ impl<'c> Translation<'c> {
                     .borrow()
                     .resolve_decl_name(union_id)
                     .unwrap();
+                if let Some(cur_file) = self.cur_file.get() {
+                    log::debug!("in file {cur_file} importing union {union_name}, id {union_id:?}");
+                    self.add_import(cur_file, union_id, &union_name);
+                }
                 match self.ast_context.index(union_field_id).kind {
                     CDeclKind::Field { typ: field_ty, .. } => {
                         let val = if ids.is_empty() {

c2rust-transpile/src/translator/structs.rs

@@ -398,6 +398,10 @@ impl<'a> Translation<'a> {
         field_expr_ids: &[CExprId],
     ) -> TranslationResult<WithStmts<Box<Expr>>> {
         let name = self.resolve_decl_inner_name(struct_id);
+        if let Some(cur_file) = self.cur_file.get() {
+            log::debug!("in file {cur_file} importing struct {name}, id {struct_id:?}");
+            self.add_import(cur_file, struct_id, &name);
+        }
 
         let (field_decl_ids, platform_byte_size) = match self.ast_context.index(struct_id).kind {
             CDeclKind::Struct {