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// LuaUtil: Various additional functions for working with lua
// Copyright (C) 2011 Pavel Labath
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#ifndef FBTK_LUAUTIL_HH
#define FBTK_LUAUTIL_HH
#include <vector>
#include "Luamm.hh"
namespace FbTk {
/*
* This class augments lua::state with additional functions/features. Every object automatically
* calls registered init functions, which can be used to initialize/create global variables in
* the lua state. Functions can be registered by calling registerInitFunction or by creating
* objects of type RegisterInitFunction.
*/
class Lua: public lua::state {
public:
Lua();
/*
* makeReadOnly() makes the table at the specified index "read only". This means that any
* attempt to modify a table entry will result in an error (if only_existing_fields is
* false). If only_existing_fields is true then only fields that were present at the time of
* the call will be protected - user can add new entries and modify them afterwards. You
* should avoid raw access to "read only" tables -- it might not do what you think it will.
*/
void makeReadOnly(int index, bool only_existing_fields = false);
/*
* readOnlySet() is the equivalent of settable, except that it works on "read only" tables.
* It can be used to modify protected entries or create new ones.
*/
void readOnlySet(int index);
void readOnlySetField(int index, const char *k);
template<typename Functor>
static void registerInitFunction(const Functor &fn) {
s_init_functions.push_back(new SlotImpl<Functor, void, Lua &>(fn));
}
class RegisterInitFunction {
public:
template<typename Functor>
RegisterInitFunction(const Functor &fn) {
registerInitFunction(fn);
}
};
private:
typedef Slot<void, Lua &> InitFunction;
struct AutoVector: public std::vector<InitFunction *> {
~AutoVector() {
for(iterator it = begin(); it != end(); ++it)
delete *it;
}
};
typedef AutoVector InitFunctions;
static InitFunctions s_init_functions;
};
} // namespace FbTk
#endif // FBTK_LUAUTIL_HH
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