added support for passing function pointers as well as native lua object

into wrappered function
added example funcptr3


git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@9264 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/lua/funcptr3/runme.lua

@@ -0,0 +1,54 @@
+---- importing ----
+if string.sub(_VERSION,1,7)=='Lua 5.0' then
+	-- lua5.0 doesnt have a nice way to do this
+	lib=loadlib('example.dll','Example_Init') or loadlib('example.so','Example_Init')
+	assert(lib)()
+else
+	-- lua 5.1 does
+	require('example')
+end
+
+a = 37
+b = 42
+
+-- Now call our C function
+
+print("Trying some C functions")
+print("    a        =", a)
+print("    b        =", b)
+print("    add(a,b) =", example.add(a,b))
+print("    sub(a,b) =", example.sub(a,b))
+print("    mul(a,b) =", example.mul(a,b))
+
+print("Calling them using the my_func()")
+print("    add(a,b) =", example.callback(a,b,example.add))
+print("    sub(a,b) =", example.callback(a,b,example.sub))
+print("    mul(a,b) =", example.callback(a,b,example.mul))
+
+print("Now let us write our own function")
+function foo(a,b) return 101 end
+print("    foo(a,b) =", example.callback(a,b,foo))
+
+print("Now let us try something that will fail")
+local ok,c=pcall(example.callback,a,b,print)
+if ok==false then
+	print("this failed as expected, error:",c)
+else
+	print("oops, that worked! result:",c)
+end
+
+
+-- part2 stored function
+print("trying a stored fn")
+print("the_func=",example.the_func)
+print("setting to print")
+example.the_func=print
+print("the_func=",example.the_func)
+print("call_the_func(5)")
+example.call_the_func(5)
+
+function bar(i) print("bar",i) end
+print("setting to bar")
+example.the_func=bar
+print("call_the_func(5)")
+example.call_the_func(5)