Fixed up some of the code for c_enums and c_flags. Also added examples.

examples/enums.rs

@@ -0,0 +1,47 @@
+#[macro_use]
+extern crate binding;
+
+
+
+c_enum!
+{
+   /// Test enum is a simple enum testing the
+   /// capabilities of creating a C enum.
+   enum TestEnum : i32
+   {
+      /// This is the first item.
+      variant One = 1,
+
+      /// This is the second item.
+      variant Two = -2,
+
+      /// This is the third item.
+      variant Three = 3
+   }
+}
+
+
+
+pub fn main()
+{
+   let cenum: TestEnum;
+
+   cenum = TestEnum::One;
+   println!("Enum value is:  {}", cenum);
+
+   if TestEnum::is_valid_value(-2) == true
+   {
+      match TestEnum::from_value(-2)
+      {
+         Some(variant) =>
+         {
+            println!("Enum value is:  {}", variant.to_value());
+         }
+
+         None =>
+         {
+            panic!("Should not happen since we checked ahead of time.");
+         }
+      }
+   }
+}