Fixed issues with C++ classes and hierachies across multiple source files.

Fixed imports test case & added run test.
Added Examples/imports.
Added typename for raw lua_State*
Added documentation on native functions.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@9748 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/lua/import/runme.lua

@@ -0,0 +1,103 @@
+# Test various properties of classes defined in separate modules
+
+print("Testing the %import directive")
+
+if string.sub(_VERSION,1,7)=='Lua 5.0' then
+	-- lua5.0 doesnt have a nice way to do this
+	function loadit(a,b)
+		lib=loadlib(a..':dll',b) or loadlib(a..':so',b)
+		assert(lib)()
+	end
+	loadit('base','Base_Init')
+	loadit('foo','Foo_Init')
+	loadit('bar','Bar_Init')
+	loadit('spam','Spam_Init')
+else
+	-- lua 5.1 does
+	require 'base'
+	require 'foo'
+	require 'bar'
+	require 'spam'
+end
+
+-- Create some objects
+
+print("Creating some objects")
+
+a = base.Base()
+b = foo.Foo()
+c = bar.Bar()
+d = spam.Spam()
+
+-- Try calling some methods
+print("Testing some methods")
+print("Should see 'Base::A' ---> ",a:A())
+print("Should see 'Base::B' ---> ",a:B())
+
+print("Should see 'Foo::A' ---> ",b:A())
+print("Should see 'Foo::B' ---> ",b:B())
+
+print("Should see 'Bar::A' ---> ",c:A())
+print("Should see 'Bar::B' ---> ",c:B())
+
+print("Should see 'Spam::A' ---> ",d:A())
+print("Should see 'Spam::B' ---> ",d:B())
+
+-- Try some casts
+
+print("\nTesting some casts")
+
+x = a:toBase()
+print("Should see 'Base::A' ---> ",x:A())
+print("Should see 'Base::B' ---> ",x:B())
+
+x = b:toBase()
+print("Should see 'Foo::A' ---> ",x:A())
+print("Should see 'Base::B' ---> ",x:B())
+
+x = c:toBase()
+print("Should see 'Bar::A' ---> ",x:A())
+print("Should see 'Base::B' ---> ",x:B())
+
+x = d:toBase()
+print("Should see 'Spam::A' ---> ",x:A())
+print("Should see 'Base::B' ---> ",x:B())
+
+x = d:toBar()
+print("Should see 'Bar::B' ---> ",x:B())
+
+
+print "\nTesting some dynamic casts\n"
+x = d:toBase()
+
+print " Spam -> Base -> Foo : "
+y = foo.Foo_fromBase(x)
+if y then
+      print "bad swig"
+else
+      print "good swig"
+end
+
+print " Spam -> Base -> Bar : "
+y = bar.Bar_fromBase(x)
+if y then
+      print "good swig"
+else
+      print "bad swig"
+end
+      
+print " Spam -> Base -> Spam : "
+y = spam.Spam_fromBase(x)
+if y then
+      print "good swig"
+else
+      print "bad swig"
+end
+
+print " Foo -> Spam : "
+y = spam.Spam_fromBase(b)
+if y then
+      print "bad swig"
+else
+      print "good swig"
+end