Add test for #12041 (#8626)

Author: chrchr-github

test/testsimplifytypedef.cpp

@@ -232,6 +232,7 @@ class TestSimplifyTypedef : public TestFixture {
         TEST_CASE(simplifyTypedef159);
         TEST_CASE(simplifyTypedef160);
         TEST_CASE(simplifyTypedef161);
+        TEST_CASE(simplifyTypedef162);
 
         TEST_CASE(simplifyTypedefFunction1);
         TEST_CASE(simplifyTypedefFunction2); // ticket #1685
@@ -3859,6 +3860,14 @@ class TestSimplifyTypedef : public TestFixture {
         TODO_ASSERT_EQUALS(exp2, cur2, tok(code2));
     }
 
+    void simplifyTypedef162() {
+        const char code[] = "using std::vector;\n" // #12041
+                            "typedef vector<int> ints;\n"
+                            "void f(ints v);\n";
+        const char exp[] = "void f ( std :: vector < int > v ) ;";
+        ASSERT_EQUALS(exp, tok(code));
+    }
+
     void simplifyTypedefFunction1() {
         {
             const char code[] = "typedef void (*my_func)();\n"