main.cpp: added option -f to fail on output error (danmar#436)

Author: firewave

main.cpp

@@ -18,6 +18,7 @@ int main(int argc, char **argv)
     bool error = false;
     const char *filename = nullptr;
     bool use_istream = false;
+    bool fail_on_error = false;
 
     // Settings..
     simplecpp::DUI dui;
@@ -70,6 +71,10 @@ int main(int argc, char **argv)
                 error_only = true;
                 found = true;
                 break;
+            case 'f':
+                fail_on_error = true;
+                found = true;
+                break;
             }
             if (!found) {
                 std::cout << "error: option '" << arg << "' is unknown." << std::endl;
@@ -172,5 +177,8 @@ int main(int argc, char **argv)
         }
     }
 
+    if (fail_on_error && !outputList.empty())
+        return 1;
+
     return 0;
 }