From 5657e28ca5cbf1a164baec05ac11c56b24896ba7 Mon Sep 17 00:00:00 2001
From: Turiiya <34311583+ttytm@users.noreply.github.com>
Date: Fri, 31 May 2024 07:34:53 +0200
Subject: [PATCH] parser: register selective import aliases as used (#21613)

---
 vlib/v/parser/module.v                                     | 6 ++++++
 vlib/v/parser/tests/import_alias_selective_fn_used.out     | 0
 vlib/v/parser/tests/import_alias_selective_fn_used.vv      | 3 +++
 vlib/v/parser/tests/import_alias_selective_symbol_used.out | 5 +++++
 vlib/v/parser/tests/import_alias_selective_symbol_used.vv  | 3 +++
 5 files changed, 17 insertions(+)
 create mode 100644 vlib/v/parser/tests/import_alias_selective_fn_used.out
 create mode 100644 vlib/v/parser/tests/import_alias_selective_fn_used.vv
 create mode 100644 vlib/v/parser/tests/import_alias_selective_symbol_used.out
 create mode 100644 vlib/v/parser/tests/import_alias_selective_symbol_used.vv

diff --git a/vlib/v/parser/module.v b/vlib/v/parser/module.v
index 86948f8d9..0ab553dff 100644
--- a/vlib/v/parser/module.v
+++ b/vlib/v/parser/module.v
@@ -33,6 +33,12 @@ 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('.')
+	for alias, mod in p.imports {
+		if mod == short_import_name {
+			p.register_used_import(alias)
+			return
+		}
+	}
 	p.register_used_import(short_import_name)
 }
 
diff --git a/vlib/v/parser/tests/import_alias_selective_fn_used.out b/vlib/v/parser/tests/import_alias_selective_fn_used.out
new file mode 100644
index 000000000..e69de29bb
diff --git a/vlib/v/parser/tests/import_alias_selective_fn_used.vv b/vlib/v/parser/tests/import_alias_selective_fn_used.vv
new file mode 100644
index 000000000..7d68eb9e4
--- /dev/null
+++ b/vlib/v/parser/tests/import_alias_selective_fn_used.vv
@@ -0,0 +1,3 @@
+import os as vos { execute }
+
+execute('ls')
diff --git a/vlib/v/parser/tests/import_alias_selective_symbol_used.out b/vlib/v/parser/tests/import_alias_selective_symbol_used.out
new file mode 100644
index 000000000..a76273e0e
--- /dev/null
+++ b/vlib/v/parser/tests/import_alias_selective_symbol_used.out
@@ -0,0 +1,5 @@
+vlib/v/parser/tests/import_alias_selective_symbol_used.vv:3:1: warning: unused variable: `os`
+    1 | import os as vos { Result }
+    2 | 
+    3 | os := Result{}
+      | ~~
diff --git a/vlib/v/parser/tests/import_alias_selective_symbol_used.vv b/vlib/v/parser/tests/import_alias_selective_symbol_used.vv
new file mode 100644
index 000000000..03272b06d
--- /dev/null
+++ b/vlib/v/parser/tests/import_alias_selective_symbol_used.vv
@@ -0,0 +1,3 @@
+import os as vos { Result }
+
+os := Result{}
-- 
2.39.5