2011-08-14 04:09:11 +02:00
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#ifndef LUAOBJECT_H
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#define LUAOBJECT_H
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2011-08-15 16:06:15 +02:00
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#include "declarations.h"
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2011-08-14 04:09:11 +02:00
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/// LuaObject, all script-able classes have it as base
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class LuaObject : public std::enable_shared_from_this<LuaObject>
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{
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public:
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LuaObject();
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2011-08-15 16:06:15 +02:00
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virtual ~LuaObject();
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2011-08-14 04:09:11 +02:00
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/// Calls a function or table of functions stored in a lua field, results are pushed onto the stack,
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/// if any lua error occurs, it will be reported to stdout and return 0 results
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/// @return the number of results
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template<typename... T>
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int callLuaField(const std::string& field, const T&... args);
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/// Sets a field in this lua object
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template<typename T>
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void setLuaField(const std::string& key, const T& value);
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/// Gets a field from this lua object
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template<typename T>
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T getLuaField(const std::string& key);
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/// Release fields table reference
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void luaReleaseFieldsTable();
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/// Sets a field from this lua object, the value must be on the stack
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void luaSetField(const std::string& key);
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/// Gets a field from this lua object, the result is pushed onto the stack
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void luaGetField(const std::string& key);
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/// Returns the number of references of this object
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/// @note each userdata of this object on lua counts as a reference
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int getUseCount();
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/// Returns the class name used in Lua
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virtual std::string getLuaObjectName() const {
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// this could later be cached for more performance
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return fw::demangle_name(typeid(*this).name());
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2011-08-14 04:09:11 +02:00
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}
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LuaObjectPtr asLuaObject() { return shared_from_this(); }
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private:
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int m_fieldsTableRef;
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};
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#include "luainterface.h"
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template<typename... T>
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int LuaObject::callLuaField(const std::string& field, const T&... args) {
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2011-08-14 16:09:26 +02:00
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if(m_fieldsTableRef != -1) {
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// note that the field must be retrieved from this object lua value
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// to force using the __index metamethod of it's metatable
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// so cannot use LuaObject::getField here
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// push field
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g_lua.pushObject(asLuaObject());
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g_lua.getField(field);
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// the first argument is always this object (self)
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g_lua.insert(-2);
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g_lua.polymorphicPush(args...);
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return g_lua.protectedCall(1 + sizeof...(args));
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} else
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return 0;
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2011-08-14 04:09:11 +02:00
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}
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template<typename T>
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void LuaObject::setLuaField(const std::string& key, const T& value) {
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g_lua.polymorphicPush(value);
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luaSetField(key);
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}
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template<typename T>
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T LuaObject::getLuaField(const std::string& key) {
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luaGetField(key);
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return g_lua.polymorphicPop<T>();
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}
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#endif
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