From db57c0df51272f12a661b9afbfc2f65af5054bd9 Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipensp@gmail.com>
Date: Fri, 10 Jan 2025 08:54:04 -0300
Subject: [PATCH] fix

---
 vlib/v/gen/c/fn.v                             |  8 ++++
 .../tests/fns/call_member_from_ptr_ptr_test.v | 43 +++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 vlib/v/tests/fns/call_member_from_ptr_ptr_test.v

diff --git a/vlib/v/gen/c/fn.v b/vlib/v/gen/c/fn.v
index d84ba1040b95a8..9442abab7fb14c 100644
--- a/vlib/v/gen/c/fn.v
+++ b/vlib/v/gen/c/fn.v
@@ -1879,7 +1879,15 @@ fn (mut g Gen) fn_call(node ast.CallExpr) {
 				g.write('(*(${g.styp(fn_typ)}*)')
 			}
 		}
+		needs_deref := node.left_type.nr_muls() > 1
+		if needs_deref {
+			g.write('(')
+			g.write('*'.repeat(node.left_type.nr_muls() - 1))
+		}
 		g.expr(node.left)
+		if needs_deref {
+			g.write(')')
+		}
 		if node.left_type.is_ptr() {
 			g.write('->')
 		} else {
diff --git a/vlib/v/tests/fns/call_member_from_ptr_ptr_test.v b/vlib/v/tests/fns/call_member_from_ptr_ptr_test.v
new file mode 100644
index 00000000000000..1231b2595b0a9b
--- /dev/null
+++ b/vlib/v/tests/fns/call_member_from_ptr_ptr_test.v
@@ -0,0 +1,43 @@
+import gg
+
+pub type WindowResizeFn = fn (window &Window, w int, h int)
+
+@[heap]
+pub struct Window {
+	id string = '_window_'
+pub mut:
+	resize_fn WindowResizeFn = unsafe { nil }
+}
+
+@[params]
+pub struct WindowParams {
+pub:
+	on_resize WindowResizeFn = unsafe { nil }
+}
+
+fn window_resized(event gg.Event, mut w &Window) {
+	window_width, window_height := 200, 100
+
+	if w.resize_fn != WindowResizeFn(0) {
+		w.resize_fn(w, window_width, window_height)
+	}
+}
+
+fn on_event(e &gg.Event, mut w Window) {
+	window_resized(e, mut w)
+}
+
+fn on_resize(window &Window, w int, h int) {
+	assert w == 200
+	assert h == 100
+}
+
+fn test_main() {
+	e := gg.Event{}
+	mut w := &Window{
+		resize_fn: on_resize
+	}
+
+	on_event(e, mut w)
+	assert true
+}