Add test for #6342 (#3569)

* Add test for #6342

* Format

Author: chrchr-github

test/testtokenize.cpp

@@ -341,6 +341,7 @@ class TestTokenizer : public TestFixture {
         TEST_CASE(simplifyOperatorName27);
         TEST_CASE(simplifyOperatorName28);
         TEST_CASE(simplifyOperatorName29); // spaceship operator
+        TEST_CASE(simplifyOperatorName31); // #6342
 
         TEST_CASE(simplifyOverloadedOperators1);
         TEST_CASE(simplifyOverloadedOperators2); // (*this)(123)
@@ -4834,6 +4835,17 @@ class TestTokenizer : public TestFixture {
         ASSERT_EQUALS(code, tokenizeAndStringify(code));
     }
 
+    void simplifyOperatorName31() { // #6342
+        const char code[] = "template <typename T>\n"
+                            "struct B {\n"
+                            "    typedef T A[3];\n"
+                            "    operator A& () { return x_; }\n"
+                            "    A x_;\n"
+                            "};";
+        ASSERT_EQUALS("template < typename T >\nstruct B {\n\noperatorT ( & ( ) ) [ 3 ] { return x_ ; }\nT x_ [ 3 ] ;\n} ;", tokenizeAndStringify(code));
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void simplifyOperatorName10() { // #8746
         const char code1[] = "using a::operator=;";
         ASSERT_EQUALS("using a :: operator= ;", tokenizeAndStringify(code1));