Implement option class inheritance

For now multiple, non-virtual inheritance is supported. An option class
can now also be declared abstract using the class c = 0 {...}; syntax.
New option, --exclude-base, controls whether base class information is
present in usage and documentation.

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/inheritance/test.cli b/tests/inheritance/test.cli
new file mode 100644
index 0000000..481a771
--- /dev/null
+++ b/tests/inheritance/test.cli
@@ -0,0 +1,26 @@
+// file      : tests/inheritance/test.cli
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+include <string>;
+
+class base1 = 0
+{
+  bool --very-long-flag {"Long flag."};
+};
+
+class base2
+{
+  std::string -s {"<str>", "Short string."};
+};
+
+class interm: base1
+{
+  int -i = 1 {"<num>", "Integer."};
+};
+
+class options: interm, base2
+{
+  std::string --string {"<str>", "Long string."};
+};