Fix #11559 FN functionConst (#4795)

Author: chrchr-github

lib/symboldatabase.cpp

@@ -1373,11 +1373,15 @@ void SymbolDatabase::createSymbolDatabaseEnums()
 
     // find enumerators
     for (const Token* tok = mTokenizer->list.front(); tok != mTokenizer->list.back(); tok = tok->next()) {
-        if (tok->tokType() != Token::eName)
+        const bool isVariable = (tok->tokType() == Token::eVariable && !tok->variable());
+        if (tok->tokType() != Token::eName && !isVariable)
             continue;
         const Enumerator * enumerator = findEnumerator(tok, tokensThatAreNotEnumeratorValues);
-        if (enumerator)
-            const_cast<Token *>(tok)->enumerator(enumerator);
+        if (enumerator) {
+            if (isVariable)
+                const_cast<Token*>(tok)->varId(0);
+            const_cast<Token*>(tok)->enumerator(enumerator);
+        }
     }
 }
 
@@ -4919,6 +4923,12 @@ const Enumerator * SymbolDatabase::findEnumerator(const Token * tok, std::set<st
         if (enumerator && !(enumerator->scope && enumerator->scope->enumClass))
             return enumerator;
 
+        if (Token::simpleMatch(tok->astParent(), ".")) {
+            const Token* varTok = tok->astParent()->astOperand1();
+            if (varTok && varTok->variable() && varTok->variable()->type() && varTok->variable()->type()->classScope)
+                scope = varTok->variable()->type()->classScope;
+        }
+
         for (std::vector<Scope *>::const_iterator s = scope->nestedList.cbegin(); s != scope->nestedList.cend(); ++s) {
             enumerator = (*s)->findEnumerator(tokStr);
 
@@ -5433,6 +5443,8 @@ const Function* Scope::findFunction(const Token *tok, bool requireConst) const
                     if (rml)
                         valuetok = rml->previous();
                 }
+                if (vartok->isEnumerator())
+                    valuetok = vartok;
                 const ValueType::MatchResult res = ValueType::matchParameter(valuetok->valueType(), var, funcarg);
                 if (res == ValueType::MatchResult::SAME)
                     ++same;

test/testplatform.cpp

@@ -182,7 +182,7 @@ class TestPlatform : public TestFixture {
         ASSERT_EQUALS(64, platform.long_long_bit);
     }
 
-    void valid_config_file_1() {
+    void valid_config_file_1() const {
         // Valid platform configuration with all possible values specified.
         // Similar to the avr8 platform file.
         const char xmldata[] = "<?xml version=\"1.0\"?>\n"
@@ -226,7 +226,7 @@ class TestPlatform : public TestFixture {
         ASSERT_EQUALS(64, platform.long_long_bit);
     }
 
-    void valid_config_file_2() {
+    void valid_config_file_2() const {
         // Valid platform configuration with all possible values specified and
         // char_bit > 8.
         const char xmldata[] = "<?xml version=\"1.0\"?>\n"
@@ -296,7 +296,7 @@ class TestPlatform : public TestFixture {
         TODO_ASSERT(!readPlatform(platform, xmldata));
     }
 
-    void valid_config_file_4() {
+    void valid_config_file_4() const {
         // Valid platform configuration with all possible values specified and
         // set to 0.
         const char xmldata[] = "<?xml version=\"1.0\"?>\n"

test/testsymboldatabase.cpp

@@ -387,6 +387,7 @@ class TestSymbolDatabase : public TestFixture {
         TEST_CASE(enum9);
         TEST_CASE(enum10); // #11001
         TEST_CASE(enum11);
+        TEST_CASE(enum12);
 
         TEST_CASE(sizeOfType);
 
@@ -5532,6 +5533,22 @@ class TestSymbolDatabase : public TestFixture {
         ASSERT_EQUALS("", errout.str());
     }
 
+    void enum12() {
+        GET_SYMBOL_DB_C("struct { enum E { E0 }; } t;\n"
+                        "void f() {\n"
+                        "    if (t.E0) {}\n"
+                        "}\n");
+        ASSERT(db != nullptr);
+        auto it = db->scopeList.begin();
+        std::advance(it, 2);
+        const Enumerator* E0 = it->findEnumerator("E0");
+        ASSERT(E0 && E0->value_known);
+        ASSERT_EQUALS(E0->value, 0);
+        const Token* const e = Token::findsimplematch(tokenizer.tokens(), "E0 )");
+        ASSERT(e && e->enumerator());
+        ASSERT_EQUALS(e->enumerator(), E0);
+    }
+
     void sizeOfType() {
         // #7615 - crash in Symboldatabase::sizeOfType()
         GET_SYMBOL_DB("enum e;\n"
@@ -7011,6 +7028,20 @@ class TestSymbolDatabase : public TestFixture {
             ASSERT(functok->function()->name() == "f");
             ASSERT_EQUALS(3, functok->function()->tokenDef->linenr());
         }
+        {
+            GET_SYMBOL_DB("struct T { enum E { E0 }; } t; \n" // #11559
+                          "void f(const void*, T::E) {}\n"
+                          "void f(const int&, T::E) {}\n"
+                          "void g() {\n"
+                          "    f(nullptr, t.E0);\n"
+                          "}\n");
+            ASSERT_EQUALS("", errout.str());
+            const Token *functok = Token::findsimplematch(tokenizer.tokens(), "f ( nullptr");
+            ASSERT(functok);
+            ASSERT(functok->function());
+            ASSERT(functok->function()->name() == "f");
+            ASSERT_EQUALS(2, functok->function()->tokenDef->linenr());
+        }
     }
 
     void findFunction45() {