From 1ca7157b8142b0d9c4bde125bbee1d9aa3098921 Mon Sep 17 00:00:00 2001
From: "ChAoS_UnItY (Kyle Lin)" <minecraft.kyle.train@gmail.com>
Date: Fri, 14 Mar 2025 21:45:01 +0800
Subject: [PATCH] markused: fix markused behavior on array / map index getter /
 setter / slice (#23931)

---
 vlib/v/markused/walker.v                            | 13 +++++++++++++
 vlib/v/tests/skip_unused/array_index.run.out        |  1 +
 .../skip_unused/array_index.skip_unused.run.out     |  1 +
 vlib/v/tests/skip_unused/array_index.vv             |  3 +++
 4 files changed, 18 insertions(+)
 create mode 100644 vlib/v/tests/skip_unused/array_index.run.out
 create mode 100644 vlib/v/tests/skip_unused/array_index.skip_unused.run.out
 create mode 100644 vlib/v/tests/skip_unused/array_index.vv

diff --git a/vlib/v/markused/walker.v b/vlib/v/markused/walker.v
index b9d67c9e2..f67b73888 100644
--- a/vlib/v/markused/walker.v
+++ b/vlib/v/markused/walker.v
@@ -364,11 +364,24 @@ fn (mut w Walker) expr(node_ ast.Expr) {
 			}
 			sym := w.table.final_sym(node.left_type)
 			if sym.kind == .map {
+				if node.is_setter {
+					w.mark_builtin_map_method_as_used('set')
+				} else {
+					w.mark_builtin_map_method_as_used('get')
+				}
+
 				w.features.used_maps++
 			} else if sym.kind == .array {
+				if node.is_setter {
+					w.mark_builtin_array_method_as_used('set')
+				} else {
+					w.mark_builtin_array_method_as_used('get')
+				}
+
 				w.features.used_arrays++
 			} else if sym.kind == .string {
 				if node.index is ast.RangeExpr {
+					w.mark_builtin_array_method_as_used('slice')
 					w.features.range_index = true
 				}
 			}
diff --git a/vlib/v/tests/skip_unused/array_index.run.out b/vlib/v/tests/skip_unused/array_index.run.out
new file mode 100644
index 000000000..84e8f8061
--- /dev/null
+++ b/vlib/v/tests/skip_unused/array_index.run.out
@@ -0,0 +1 @@
+[17, 34, 51, 68, 238]
diff --git a/vlib/v/tests/skip_unused/array_index.skip_unused.run.out b/vlib/v/tests/skip_unused/array_index.skip_unused.run.out
new file mode 100644
index 000000000..84e8f8061
--- /dev/null
+++ b/vlib/v/tests/skip_unused/array_index.skip_unused.run.out
@@ -0,0 +1 @@
+[17, 34, 51, 68, 238]
diff --git a/vlib/v/tests/skip_unused/array_index.vv b/vlib/v/tests/skip_unused/array_index.vv
new file mode 100644
index 000000000..aa7c7a467
--- /dev/null
+++ b/vlib/v/tests/skip_unused/array_index.vv
@@ -0,0 +1,3 @@
+fn main() {
+	println('0x11223344ee'.u8_array())
+}
-- 
2.39.5