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Implement C++ connect()

This commit is contained in:
Eduardo Bart 2012-08-17 23:08:00 -03:00
parent fdea7f3d66
commit 403ed3c10f
1 changed files with 61 additions and 0 deletions
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61
src/framework/luaengine/luaobject.h
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@ -33,6 +33,9 @@ public:
LuaObject();
virtual ~LuaObject();
template<typename T>
void connectLuaField(const std::string& field, const std::function<T>& f, bool pushFront = false);
/// Calls a function or table of functions stored in a lua field, results are pushed onto the stack,
/// if any lua error occurs, it will be reported to stdout and return 0 results
/// @return the number of results
@ -85,8 +88,66 @@ private:
int m_fieldsTableRef;
};
template<typename F>
void connect(const LuaObjectPtr& obj, const std::string& field, const std::function<F>& f, bool pushFront = false);
template<typename Lambda>
typename std::enable_if<std::is_constructible<decltype(&Lambda::operator())>::value, void>::type
connect(const LuaObjectPtr& obj, const std::string& field, const Lambda& f, bool pushFront = false);
#include "luainterface.h"
template<typename T>
void LuaObject::connectLuaField(const std::string& field, const std::function<T>& f, bool pushFront)
{
luaGetField(field);
if(g_lua.isTable()) {
if(pushFront)
g_lua.pushInteger(1);
push_luavalue(f);
g_lua.callGlobalField("table","insert");
} else {
if(g_lua.isNil()) {
push_luavalue(f);
luaSetField(field);
g_lua.pop();
} else if(g_lua.isFunction()) {
g_lua.newTable();
g_lua.insert(-2);
g_lua.rawSeti(1);
push_luavalue(f);
g_lua.rawSeti(2);
luaSetField(field);
}
}
}
// connect for std::function
template<typename F>
void connect(const LuaObjectPtr& obj, const std::string& field, const std::function<F>& f, bool pushFront) {
obj->connectLuaField<F>(field, f, pushFront);
}
namespace luabinder {
template<typename F>
struct connect_lambda;
template<typename Lambda, typename Ret, typename... Args>
struct connect_lambda<Ret(Lambda::*)(Args...) const> {
static void call(const LuaObjectPtr& obj, const std::string& field, const Lambda& f, bool pushFront) {
connect(obj, field, std::function<Ret(Args...)>(f), pushFront);
}
};
};
// connect for lambdas
template<typename Lambda>
typename std::enable_if<std::is_constructible<decltype(&Lambda::operator())>::value, void>::type
connect(const LuaObjectPtr& obj, const std::string& field, const Lambda& f, bool pushFront) {
typedef decltype(&Lambda::operator()) F;
luabinder::connect_lambda<F>::call(obj, field, f, pushFront);
}
template<typename... T>
int LuaObject::luaCallField(const std::string& field, const T&... args) {
// note that the field must be retrieved from this object lua value