Added TODO test case TestPreprocessor::multiline_comment

Made tokenizer to printout token list in case of syntax error, if debug is used

src/tokenize.cpp

@@ -2670,6 +2670,11 @@ const Token * Tokenizer::FindClassFunction(const Token *tok, const char classnam
 
 void Tokenizer::syntaxError(const Token *tok, char c)
 {
+    if (_settings._debug)
+    {
+        _tokens->printOut();
+    }
+
     if (!_errorLogger)
     {
         std::cout << "### Unlogged error at Tokenizer::syntaxError" << std::endl;

test/testpreprocessor.cpp

@@ -122,6 +122,7 @@ private:
 
         TEST_CASE(unicode1);
         TEST_CASE(define_part_of_func);
+        TEST_CASE(multiline_comment);
     }
 
 
@@ -928,6 +929,27 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
+    void multiline_comment()
+    {
+        errout.str("");
+        const char filedata[] = "#define ABC {// \\\n"
+                                "}\n"
+                                "void f() ABC }\n";
+
+        // Preprocess => actual result..
+        std::istringstream istr(filedata);
+        std::map<std::string, std::string> actual;
+        Preprocessor preprocessor;
+        preprocessor.preprocess(istr, actual, "file.c");
+
+        // Compare results..
+        ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
+        TODO_ASSERT_EQUALS("\n\nvoid f() { }\n", actual[""]);
+        ASSERT_EQUALS("", errout.str());
+    }
+
+
+
 };
 
 REGISTER_TEST(TestPreprocessor)