From b1914fc217b58b048b410b71f60ceb635ea32fb4 Mon Sep 17 00:00:00 2001
From: Larsimusrex <lars.luis@gmail.com>
Date: Fri, 12 Sep 2025 11:21:02 +0200
Subject: [PATCH] fix type_default for empty structs

---
 vlib/v/gen/c/cgen.v  | 3 ++-
 vlib/x/json2/types.v | 4 +---
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index e3931558a3..c4fece7672 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -7574,8 +7574,9 @@ fn (mut g Gen) type_default_impl(typ_ ast.Type, decode_sumtype bool) string {
 			}
 		}
 		.struct {
-			mut has_none_zero := false
 			info := sym.info as ast.Struct
+			mut has_none_zero := info.fields.len == 0
+
 			mut init_str := if info.is_anon && !g.inside_global_decl {
 				'(${g.styp(typ)}){'
 			} else {
diff --git a/vlib/x/json2/types.v b/vlib/x/json2/types.v
index b9a71fd5b6..e600686701 100644
--- a/vlib/x/json2/types.v
+++ b/vlib/x/json2/types.v
@@ -24,9 +24,7 @@ pub type Any = []Any
 	| Null
 
 // Null is a simple representation of the `null` value in JSON.
-pub struct Null {
-	is_null bool = true
-}
+pub struct Null {}
 
 // null is an instance of the Null type, to ease comparisons with it.
 pub const null = Null{}