1 files changed, 33 insertions, 4 deletions
diff --git a/cpp/src/slice2html/Main.cpp b/cpp/src/slice2html/Main.cpp
index 3b03ff9493c..905bb773a0c 100644
--- a/cpp/src/slice2html/Main.cpp
+++ b/cpp/src/slice2html/Main.cpp
@@ -63,6 +63,7 @@ usage(const char* n)
         "Options:\n"
         "-h, --help           Show this message.\n"
         "-v, --version        Display the Ice version.\n"
+        "--validate               Validate command line options.\n"
         "-DNAME               Define NAME as 1.\n"
         "-DNAME=DEF           Define NAME as DEF.\n"
         "-UNAME               Remove any definition for NAME.\n"
@@ -90,6 +91,7 @@ compile(int argc, char* argv[])
     IceUtilInternal::Options opts;
     opts.addOpt("h", "help");
     opts.addOpt("v", "version");
+    opts.addOpt("", "validate");
     opts.addOpt("D", "", IceUtilInternal::Options::NeedArg, "", IceUtilInternal::Options::Repeat);
     opts.addOpt("U", "", IceUtilInternal::Options::NeedArg, "", IceUtilInternal::Options::Repeat);
     opts.addOpt("I", "", IceUtilInternal::Options::NeedArg, "", IceUtilInternal::Options::Repeat);
@@ -108,6 +110,16 @@ compile(int argc, char* argv[])
     opts.addOpt("", "ice");
     opts.addOpt("", "underscore");
 
+    bool validate = false;
+    for(int i = 0; i < argc; ++i)
+    {
+        if(string(argv[i]) == "--validate")
+        {
+            validate = true;
+            break;
+        }
+    }
+
     vector<string> args;
     try
     {
@@ -116,7 +128,10 @@ compile(int argc, char* argv[])
     catch(const IceUtilInternal::BadOptException& e)
     {
         getErrorStream() << argv[0] << ": error: " << e.reason << endl;
-        usage(argv[0]);
+        if(!validate)
+        {
+            usage(argv[0]);
+        }
         return EXIT_FAILURE;
     }
 
@@ -173,7 +188,10 @@ compile(int argc, char* argv[])
         {
             getErrorStream() << argv[0] << ": error: the --index operation requires a positive integer argument"
                              << endl;
-            usage(argv[0]);
+            if(!validate)
+            {
+                usage(argv[0]);
+            }
             return EXIT_FAILURE;
         }
     }
@@ -194,7 +212,10 @@ compile(int argc, char* argv[])
         {
             getErrorStream() << argv[0] << ": error: the --summary operation requires a positive integer argument"
                              << endl;
-            usage(argv[0]);
+            if(!validate)
+            {
+                usage(argv[0]);
+            }
             return EXIT_FAILURE;
         }
     }
@@ -208,10 +229,18 @@ compile(int argc, char* argv[])
     if(args.empty())
     {
         getErrorStream() << argv[0] << ": error: no input file" << endl;
-        usage(argv[0]);
+        if(!validate)
+        {
+            usage(argv[0]);
+        }
         return EXIT_FAILURE;
     }
 
+    if(validate)
+    {
+        return EXIT_SUCCESS;
+    }
+
     UnitPtr p = Unit::createUnit(true, false, ice, underscore);
 
     int status = EXIT_SUCCESS;