Fixed #6538 (Symboldatabase: improve isFunction)

lib/symboldatabase.cpp

@@ -1288,6 +1288,53 @@ bool SymbolDatabase::isFunction(const Token *tok, const Scope* outerScope, const
              (tok->previous()->isName() || tok->strAt(-1) == ">" || tok->strAt(-1) == "&" || tok->strAt(-1) == "*" || // Either a return type in front of tok
               tok->strAt(-1) == "::" || tok->strAt(-1) == "~" || // or a scope qualifier in front of tok
               outerScope->isClassOrStruct())) { // or a ctor/dtor
+
+        const Token* tok1 = tok->previous();
+
+        // skip over destructor "~"
+        if (tok1->str() == "~")
+            tok1 = tok1->previous();
+
+        // skip over qualification
+        while (Token::simpleMatch(tok1, "::")) {
+            if (Token::Match(tok1->tokAt(-1), "%name%"))
+                tok1 = tok1->tokAt(-2);
+            else
+                tok1 = tok1->tokAt(-1);
+        }
+
+        // skip over pointers and references
+        while (Token::Match(tok1, "[*&]"))
+            tok1 = tok1->tokAt(-1);
+
+        // skip over template
+        if (tok1 && tok1->str() == ">")
+            tok1 = tok1->link()->previous();
+
+        // function can't have number or variable as return type
+        if (tok1 && (tok1->isNumber() || tok1->varId()))
+            return false;
+
+        // skip over return type
+        if (Token::Match(tok1, "%name%"))
+            tok1 = tok1->previous();
+
+        // skip over qualification
+        while (Token::simpleMatch(tok1, "::")) {
+            if (Token::Match(tok1->tokAt(-1), "%name%"))
+                tok1 = tok1->tokAt(-2);
+            else
+                tok1 = tok1->tokAt(-1);
+        }
+
+        // skip over modifiers and other stuff
+        while (Token::Match(tok1, "const|static|extern|template|virtual|struct|class"))
+            tok1 = tok1->previous();
+
+        // should be at a sequence point if this is a function
+        if (!Token::Match(tok1, ">|{|}|;|public:|protected:|private:") && tok1)
+            return false;
+
         const Token* tok2 = tok->next()->link()->next();
         if (tok2 &&
             (Token::Match(tok2, "const| ;|{|=") ||

test/testgarbage.cpp

@@ -420,11 +420,11 @@ private:
 
         ASSERT_THROW(checkCode("class Foo {}; class Bar : public Foo"), InternalError);
 
-        ASSERT_THROW(checkCode("YY_DECL { switch (yy_act) {\n"
-                               "    case 65: YY_BREAK\n"
-                               "    case YY_STATE_EOF(block):\n"
-                               "        yyterminate(); \n"
-                               "} }"), InternalError); // #5663
+        checkCode("YY_DECL { switch (yy_act) {\n"
+                  "    case 65: YY_BREAK\n"
+                  "    case YY_STATE_EOF(block):\n"
+                  "        yyterminate(); \n"
+                  "} }"); // #5663
     }
 
     void garbageAST() {

test/testother.cpp

@@ -3020,7 +3020,7 @@ private:
         ASSERT_EQUALS("[test.cpp:4]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
 
         // #5707
-        check("extern int i,j\n"
+        check("extern int i,j;\n"
               "int foo() {\n"
               "    switch(i) {\n"
               "        default: j=1; break;\n"

test/testsymboldatabase.cpp

@@ -228,6 +228,7 @@ private:
         TEST_CASE(symboldatabase48); // #6417
         TEST_CASE(symboldatabase49); // #6424
         TEST_CASE(symboldatabase50); // #6432
+        TEST_CASE(symboldatabase51); // #6538
 
         TEST_CASE(isImplicitlyVirtual);
 
@@ -2128,6 +2129,22 @@ private:
         ASSERT_EQUALS(true, db && f && f->function() && f->function()->isConstructor());
     }
 
+    void symboldatabase51() { // #6538
+        GET_SYMBOL_DB("static const float f1 = 2 * foo1(a, b);\n"
+                      "static const float f2 = 2 * ::foo2(a, b);\n"
+                      "static const float f3 = 2 * std::foo3(a, b);\n"
+                      "static const float f4 = c * foo4(a, b);\n"
+                      "static const int i1 = 2 & foo5(a, b);\n");
+        ASSERT(db != nullptr);
+        if (db) {
+            ASSERT(findFunctionByName("foo1", &db->scopeList.front()) == nullptr);
+            ASSERT(findFunctionByName("foo2", &db->scopeList.front()) == nullptr);
+            ASSERT(findFunctionByName("foo3", &db->scopeList.front()) == nullptr);
+            ASSERT(findFunctionByName("foo4", &db->scopeList.front()) == nullptr);
+            ASSERT(findFunctionByName("foo5", &db->scopeList.front()) == nullptr);
+        }
+    }
+
     void isImplicitlyVirtual() {
         {
             GET_SYMBOL_DB("class Base {\n"

test/testunusedprivfunc.cpp

@@ -418,7 +418,7 @@ private:
               "class A\n"
               "{\n"
               "public:\n"
-              "    A()\n"
+              "    A();\n"
               "    void a();\n"
               "private:\n"
               "    void b();\n"