From 8119a297f7236fc7331ae13fe41ae0c8cbeb1762 Mon Sep 17 00:00:00 2001
From: yuyi <yuyi98@163.com>
Date: Mon, 14 Feb 2022 19:43:36 +0800
Subject: [PATCH] ast: fix error for 'struct embed is interface' (#13465)

---
 vlib/v/ast/table.v                            |  2 +-
 vlib/v/tests/struct_embed_is_interface_test.v | 53 +++++++++++++++++++
 2 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 vlib/v/tests/struct_embed_is_interface_test.v

diff --git a/vlib/v/ast/table.v b/vlib/v/ast/table.v
index aca8bf58d6..367baacfc4 100644
--- a/vlib/v/ast/table.v
+++ b/vlib/v/ast/table.v
@@ -1384,7 +1384,7 @@ pub fn (t Table) does_type_implement_interface(typ Type, inter_typ Type) bool {
 		}
 		// verify methods
 		for imethod in inter_sym.info.methods {
-			if method := sym.find_method(imethod.name) {
+			if method := t.find_method_with_embeds(sym, imethod.name) {
 				msg := t.is_same_method(imethod, method)
 				if msg.len > 0 {
 					return false
diff --git a/vlib/v/tests/struct_embed_is_interface_test.v b/vlib/v/tests/struct_embed_is_interface_test.v
new file mode 100644
index 0000000000..9625e2028c
--- /dev/null
+++ b/vlib/v/tests/struct_embed_is_interface_test.v
@@ -0,0 +1,53 @@
+pub struct Base {
+mut:
+	x int
+	y int
+}
+
+pub fn (mut b Base) init() {}
+
+pub fn (b Base) get_pos() (int, int) {
+	return b.x, b.y
+}
+
+pub struct Label {
+	Base
+}
+
+pub interface Widget {
+mut:
+	init()
+}
+
+pub interface Layoutable {
+	get_pos() (int, int)
+}
+
+pub struct Layout {
+	Base
+mut:
+	widgets []Widget
+}
+
+pub fn (mut l Layout) layout() {
+	for wd in l.widgets {
+		if wd is Layoutable {
+			lw := wd as Layoutable
+			dump(lw.get_pos())
+			x, y := lw.get_pos()
+			assert x == 10
+			assert y == 20
+		} else {
+			println('wd is NOT Layoutable')
+		}
+	}
+}
+
+fn test_struct_embed_is_interface() {
+	mut l := Layout{}
+	l.widgets << Label{
+		x: 10
+		y: 20
+	}
+	l.layout()
+}