1 files changed, 34 insertions, 0 deletions
diff --git a/tools/Sandcastle/Source/CommandLine/BooleanOption.cs b/tools/Sandcastle/Source/CommandLine/BooleanOption.cs
new file mode 100644
index 0000000..93ea9fd
--- /dev/null
+++ b/tools/Sandcastle/Source/CommandLine/BooleanOption.cs
@@ -0,0 +1,34 @@
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+
+using System;
+using System.IO;
+using System.Collections.Generic;
+
+namespace Microsoft.Ddue.Tools.CommandLine {
+
+    public sealed class BooleanOption : Option {
+
+        public BooleanOption(string name) : base(name) { }
+
+        public BooleanOption(string name, string description) : base(name, description) { }
+
+        internal override ParseResult ParseArgument(string argument) {
+            if ((argument != "+") && (argument != "-")) return (ParseResult.MalformedArgument);
+            if (present) return (ParseResult.MultipleOccurance);
+            present = true;
+            if (argument == "+") {
+                value = true;
+            } else {
+                value = false;
+            }
+            return (ParseResult.Success);
+        }
+
+        internal override void WriteTemplate(TextWriter writer) {
+            writer.WriteLine("/{0}+|-", Name);
+        }
+
+    }
+
+}