From 80def4a3b95f25a4b7cd0e6d94f44a00cf1b4850 Mon Sep 17 00:00:00 2001
From: Patrick Schönberger
Date: Tue, 12 May 2026 09:35:41 +0200
Subject: make mutable

---
 src/refl.zig | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

(limited to 'src/refl.zig')

diff --git a/src/refl.zig b/src/refl.zig
index 3dd851f..8da4ff1 100644
--- a/src/refl.zig
+++ b/src/refl.zig
@@ -9,18 +9,18 @@ fn A(comptime T: type) type {
 
     inline for (ti.fields, 0..) |field, idx| {
         names[idx] = field.name;
-        types[idx] = extern struct {
+        types[idx] = struct {
             value: field.type,
             pub fn get(self: @This()) field.type {
                 std.debug.print("getting {s}\n", .{field.name});
                 return self.value;
             }
-            pub fn set(self: @This(), value: field.type) void {
+            pub fn set(self: *@This(), value: field.type) void {
                 std.debug.print("setting {s}\n", .{field.name});
                 self.value = value;
             }
         };
-        const default = if (field.default_value_ptr) |def| types[idx] {.value = @as(*field.type, @constCast(@ptrCast(@alignCast(def)))).*} else null;
+        const default = if (field.default_value_ptr) |def| types[idx]{ .value = @as(*field.type, @ptrCast(@alignCast(@constCast(def)))).* } else null;
         attrs[idx] = .{
             .@"comptime" = field.is_comptime,
             .@"align" = field.alignment,
@@ -28,36 +28,41 @@ fn A(comptime T: type) type {
         };
     }
     inline for (ti.decls, 0..) |decl, idx| {
-        const default = struct {
-            pub fn call() void {
+        names[ti.fields.len + idx] = decl.name;
+        const NT = struct {
+            pub fn call(self: @This()) void {
+                _ = self;
                 std.debug.print("calling {s}\n", .{decl.name});
                 @call(.auto, @field(T, decl.name), .{});
                 std.debug.print("done calling {s}\n", .{decl.name});
             }
         };
-        names[ti.fields.len + idx] = decl.name;
-        types[ti.fields.len + idx] = type;
-        attrs[ti.fields.len + idx] = .{.default_value_ptr = &default};
+        types[ti.fields.len + idx] = NT;
+        const default = NT {};
+        attrs[ti.fields.len + idx] = .{ .default_value_ptr = &default };
     }
 
     return @Struct(.auto, null, &names, &types, &attrs);
 }
 
 pub fn main() !void {
-    const a = A(struct {
+    var a = A(struct {
         i: i32 = 123,
         j: i32 = 456,
+        s: A(struct {
+            i: i32 = 789,
+        }) = .{},
         pub fn b() void {
             std.debug.print("B!\n", .{});
         }
         pub fn c() void {
             std.debug.print("C!\n", .{});
         }
-    }) {};
-    std.debug.print("[{}] {}\n", .{@TypeOf(a), a});
+    }){};
+    std.debug.print("[{}] {}\n", .{ @TypeOf(a), a });
     a.b.call();
     a.c.call();
     std.debug.print("{}\n", .{a.i.get()});
+    a.j.set(9);
     std.debug.print("{}\n", .{a.j.get()});
 }
-
-- 
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