Fix ticket #426 (Problem with include)

http://sourceforge.net/apps/trac/cppcheck/ticket/426

src/checkclass.cpp

@@ -441,11 +441,6 @@ void CheckClass::privateFunctions()
     {
         const std::string &classname = tok1->next()->str();
 
-        // The class implementation must be available..
-        const std::string classconstructor(classname + " :: " + classname);
-        if (tok1->fileIndex() > 0 && !Token::findmatch(_tokenizer->tokens(), classconstructor.c_str()))
-            continue;
-
         // Get private functions..
         std::list<const Token *> FuncList;
         FuncList.clear();

src/tokenize.h

@@ -42,7 +42,19 @@ public:
 
     /**
      * Tokenize code
-     * @param code input stream for code
+     * @param code input stream for code, e.g.
+     * #file "p.h"
+     * class Foo
+     * {
+     * private:
+     * void Bar();
+     * };
+     *
+     * #endfile
+     * void Foo::Bar()
+     * {
+     * }
+     *
      * @param FileName The filename
      * @return false if Source code contains syntax errors
      */
@@ -50,7 +62,7 @@ public:
 
     /**
      * Create tokens from code.
-     * @param code input stream for code
+     * @param code input stream for code, same as what tokenize()
      */
     void createTokens(std::istream &code);
 

test/testunusedprivfunc.cpp

@@ -82,6 +82,57 @@ private:
               "{ }\n");
 
         ASSERT_EQUALS("[test.cpp:4]: (style) Unused private function 'Fred::f'\n", errout.str());
+
+        check("#file \"p.h\"\n"
+              "class Fred\n"
+              "{\n"
+              "private:\n"
+              "    unsigned int f();\n"
+              "public:\n"
+              "    Fred();\n"
+              "};\n"
+              "\n"
+              "#endfile\n"
+              "Fred::Fred()\n"
+              "{ }\n"
+              "\n"
+              "unsigned int Fred::f()\n"
+              "{ }\n");
+
+        ASSERT_EQUALS("[p.h:4]: (style) Unused private function 'Fred::f'\n", errout.str());
+
+        check("#file \"p.h\"\n"
+              "class Fred\n"
+              "{\n"
+              "private:\n"
+              "void f();\n"
+              "};\n"
+              "\n"
+              "\n"
+              "#endfile\n"
+              "\n"
+              "void Fred::f()\n"
+              "{\n"
+              "}\n"
+              "\n");
+        ASSERT_EQUALS("[p.h:4]: (style) Unused private function 'Fred::f'\n", errout.str());
+
+        // Don't warn about include files which implementation we don't see
+        check("#file \"p.h\"\n"
+              "class Fred\n"
+              "{\n"
+              "private:\n"
+              "void f();\n"
+              "void g() {}\n"
+              "};\n"
+              "\n"
+              "#endfile\n"
+              "\n"
+              "int main()\n"
+              "{\n"
+              "}\n"
+              "\n");
+        ASSERT_EQUALS("", errout.str());
     }