[lua] updated docs for exceptions

added new examples (exception,embed2)
update typmaps

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10300 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/lua/exception/runme.lua

@@ -0,0 +1,63 @@
+-- file: example.lua
+
+---- 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','luaopen_example') or loadlib('example.so','luaopen_example')
+	assert(lib)()
+else
+	-- lua 5.1 does
+	require('example')
+end
+
+-- throw a lot of exceptions:
+-- you must catch exceptions using pcall and then checking the result
+
+t = example.Test()
+
+print "calling t:unknown()"
+ok,res=pcall(function() t:unknown() end)
+if ok then 
+    print "  that worked! Funny"
+else
+    print("  call failed with error:",res)
+end
+
+print "calling t:simple()"
+ok,res=pcall(function() t:simple() end)
+if ok then 
+    print "  that worked! Funny"
+else
+    print("  call failed with error:",res)
+end
+
+print "calling t:message()"
+ok,res=pcall(function() t:message() end)
+if ok then 
+    print "  that worked! Funny"
+else
+    print("  call failed with error:",res)
+end
+
+print "calling t:hosed()"
+ok,res=pcall(function() t:hosed() end)
+if ok then 
+    print "  that worked! Funny"
+else
+    print("  call failed with error:",res.code,res.msg)
+end
+
+-- this is a rather strange way to perform the multiple catch of exceptions
+print "calling t:mutli()"
+for i=1,3 do
+    ok,res=pcall(function() t:multi(i) end)
+    if ok then
+        print "  that worked! Funny"
+    else
+        if swig_type(res)=="Exc *" then
+            print("  call failed with Exc exception:",res.code,res.msg)
+        else
+            print("  call failed with error:",res)
+        end
+    end
+end