From 0140f7a8d4c3e6dd5bcb070b2f532412af1d2344 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Tue, 14 Apr 2026 12:45:26 +0300
Subject: [PATCH] parser: import : warning err (fixes #24110)

---
 ...mported_symbol_named_arg_unused_import.out |  1 +
 .../foo/middleware/logger.v                   |  5 +++++
 .../main.v                                    | 20 +++++++++++++++++++
 .../middleware/logger.v                       |  5 +++++
 vlib/v/parser/module.v                        | 20 +++++++++++++------
 5 files changed, 45 insertions(+), 6 deletions(-)
 create mode 100644 vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import.out
 create mode 100644 vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/foo/middleware/logger.v
 create mode 100644 vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/main.v
 create mode 100644 vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/middleware/logger.v

diff --git a/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import.out b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import.out
new file mode 100644
index 000000000..8b1378917
--- /dev/null
+++ b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import.out
@@ -0,0 +1 @@
+
diff --git a/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/foo/middleware/logger.v b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/foo/middleware/logger.v
new file mode 100644
index 000000000..d1dc93314
--- /dev/null
+++ b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/foo/middleware/logger.v
@@ -0,0 +1,5 @@
+module middleware
+
+pub fn aliased_logger_middleware() bool {
+	return true
+}
diff --git a/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/main.v b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/main.v
new file mode 100644
index 000000000..36ef0bb5d
--- /dev/null
+++ b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/main.v
@@ -0,0 +1,20 @@
+module main
+
+import middleware { logger_middleware }
+import foo.middleware as mw { aliased_logger_middleware }
+
+struct UseConfig {
+	handler fn () bool = unsafe { nil }
+}
+
+struct App {}
+
+fn (app App) use(config UseConfig) bool {
+	return config.handler()
+}
+
+fn main() {
+	app := App{}
+	assert app.use(handler: logger_middleware)
+	assert app.use(handler: aliased_logger_middleware)
+}
diff --git a/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/middleware/logger.v b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/middleware/logger.v
new file mode 100644
index 000000000..a1054c35c
--- /dev/null
+++ b/vlib/v/checker/tests/modules/imported_symbol_named_arg_unused_import/middleware/logger.v
@@ -0,0 +1,5 @@
+module middleware
+
+pub fn logger_middleware() bool {
+	return true
+}
diff --git a/vlib/v/parser/module.v b/vlib/v/parser/module.v
index 9977aae88..0f6aaad5f 100644
--- a/vlib/v/parser/module.v
+++ b/vlib/v/parser/module.v
@@ -12,6 +12,15 @@ fn (p &Parser) known_import(mod string) bool {
 	return mod in p.imports
 }
 
+fn (p &Parser) import_alias_for_mod(mod string) ?string {
+	for alias, imported_mod in p.imports {
+		if imported_mod == mod {
+			return alias
+		}
+	}
+	return none
+}
+
 fn (p &Parser) prepend_mod(name string) string {
 	// println('prepend_mod() name=${name} p.mod=${p.mod} expr_mod=${p.expr_mod}')
 	if p.expr_mod != '' {
@@ -34,16 +43,15 @@ fn (mut p Parser) register_used_import(alias string) {
 }
 
 fn (mut p Parser) register_used_import_for_symbol_name(sym_name string) {
-	short_import_name := sym_name.all_before_last('.').all_after_last('.')
+	mod_name := sym_name.all_before_last('.')
+	short_import_name := mod_name.all_after_last('.')
 	short_symbol_name := sym_name.all_after_last('.')
 	if p.is_imported_symbol(short_symbol_name) {
 		p.imported_symbols_used[short_symbol_name] = true
 	}
-	for alias, mod in p.imports {
-		if mod == short_import_name {
-			p.register_used_import(alias)
-			return
-		}
+	if alias := p.import_alias_for_mod(mod_name) {
+		p.register_used_import(alias)
+		return
 	}
 	p.register_used_import(short_import_name)
 }
-- 
2.39.5