Fix #13328 (SymbolDatabase: does not select l-value method properly) (danmar#7026)

(cherry picked from c307483)

Author: danmar

lib/symboldatabase.cpp

@@ -5716,6 +5716,17 @@ const Function* Scope::findFunction(const Token *tok, bool requireConst, Referen
             const Function *func = it->second;
             if (ref == Reference::LValue && func->hasRvalRefQualifier())
                 continue;
+            if (ref == Reference::None && func->hasRvalRefQualifier()) {
+                if (Token::simpleMatch(tok->astParent(), ".")) {
+                    const Token* obj = tok->astParent()->astOperand1();
+                    while (obj && obj->str() == "[")
+                        obj = obj->astOperand1();
+                    if (!obj || obj->isName())
+                        continue;
+                }
+            }
+            if (func->isDestructor() && !Token::simpleMatch(tok->tokAt(-1), "~"))
+                continue;
             if (!isCall || args == func->argCount() ||
                 (func->isVariadic() && args >= (func->minArgCount() - 1)) ||
                 (args < func->argCount() && args >= func->minArgCount())) {

test/testsymboldatabase.cpp

@@ -521,6 +521,7 @@ class TestSymbolDatabase : public TestFixture {
         TEST_CASE(findFunction55); // #13004
         TEST_CASE(findFunction56);
         TEST_CASE(findFunctionRef1);
+        TEST_CASE(findFunctionRef2); // #13328
         TEST_CASE(findFunctionContainer);
         TEST_CASE(findFunctionExternC);
         TEST_CASE(findFunctionGlobalScope); // ::foo
@@ -8368,6 +8369,25 @@ class TestSymbolDatabase : public TestFixture {
         ASSERT_EQUALS(2, f->function()->tokenDef->linenr());
     }
 
+    void findFunctionRef2() {
+        GET_SYMBOL_DB("struct X {\n"
+                      "    const int& foo() const &;\n" // <- this function is called
+                      "    int foo() &&;\n"
+                      "}\n"
+                      "\n"
+                      "void foo() {\n"
+                      "    X x;\n"
+                      "    x.foo();\n"
+                      "}\n");
+        const Token* x = Token::findsimplematch(tokenizer.tokens(), "x . foo ( ) ;");
+        ASSERT(x);
+        const Token* f = x->tokAt(2);
+        ASSERT(f);
+        ASSERT(f->function());
+        ASSERT(f->function()->tokenDef);
+        ASSERT_EQUALS(2, f->function()->tokenDef->linenr());
+    }
+
     void findFunctionContainer() {
         {
             GET_SYMBOL_DB("void dostuff(std::vector<int> v);\n"