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Make better version of param list builder and make all function related concepts variadic templates via boost::pp

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This commit is contained in:
Jason Turner
2009-05-26 19:03:09 +00:00
parent 1980ba840c
commit 8138b19390
3 changed files with 90 additions and 91 deletions
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42
typelesscpp/scripting_constructors.hpp
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@@ -1,29 +1,19 @@
#include <boost/preprocessor.hpp>
#ifndef BOOST_PP_IS_ITERATING
#ifndef __scripting_constructors_hpp__
#define __scripting_constrcutors_hpp__
#define __scripting_constructors_hpp__
#include <boost/shared_ptr.hpp>
#include <boost/bind.hpp>
#include <boost/function.hpp>
//Constructors, to be made variadic
template<typename Class>
boost::shared_ptr<Class> constructor()
{
return boost::shared_ptr<Class>(new Class());
}
template<typename Class, typename Param1>
boost::shared_ptr<Class> constructor(Param1 p1)
{
return boost::shared_ptr<Class>(new Class(p1));
}
template<typename Class, typename Param1, typename Param2>
boost::shared_ptr<Class> constructor(Param1 p1, Param2 p2)
{
return boost::shared_ptr<Class>(new Class(p1, p2));
}
template<typename Class>
boost::function<boost::shared_ptr<Class> ()> build_constructor()
{
@@ -31,20 +21,26 @@ boost::function<boost::shared_ptr<Class> ()> build_constructor()
return boost::function<boost::shared_ptr<Class> ()>(func(&(constructor<Class>)));
}
template<typename Class, typename Param1>
boost::function<boost::shared_ptr<Class> (Param1)> build_constructor()
#define BOOST_PP_ITERATION_LIMITS ( 1, 10 )
#define BOOST_PP_FILENAME_1 "scripting_constructors.hpp"
#include BOOST_PP_ITERATE()
# endif
#else
# define n BOOST_PP_ITERATION()
template<typename Class, BOOST_PP_ENUM_PARAMS(n, typename Param) >
boost::shared_ptr<Class> constructor( BOOST_PP_ENUM_BINARY_PARAMS(n, Param, p) )
{
typedef boost::shared_ptr<Class> (*func)(Param1);
return boost::function<boost::shared_ptr<Class> (Param1)>(func(&(constructor<Class, Param1>)));
return boost::shared_ptr<Class>(new Class( BOOST_PP_ENUM_PARAMS(n, p) ));
}
template<typename Class, typename Param1, typename Param2>
boost::function<boost::shared_ptr<Class> (Param1, Param2)> build_constructor()
template<typename Class, BOOST_PP_ENUM_PARAMS(n, typename Param) >
boost::function<boost::shared_ptr<Class> (BOOST_PP_ENUM_PARAMS(n, Param))> build_constructor()
{
typedef boost::shared_ptr<Class> (*func)(Param1, Param2);
return boost::function<boost::shared_ptr<Class> (Param1, Param2)>(func(&(constructor<Class, Param1, Param2>)));
typedef boost::shared_ptr<Class> (*func)(BOOST_PP_ENUM_PARAMS(n, Param));
return boost::function<boost::shared_ptr<Class> (BOOST_PP_ENUM_PARAMS(n, Param))>(func(&(constructor<Class, BOOST_PP_ENUM_PARAMS(n, Param)>)));
}
#endif

131
typelesscpp/scripting_functions.hpp
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@@ -1,6 +1,12 @@
#ifndef __scripting_function_hpp__
#define __scripting_function_hpp__
#include <boost/preprocessor.hpp>
#define gettypeinfo(z,n,text) ti.push_back(Get_Type_Info<Param ## n>()());
#define casthelper(z,n,text) ,Cast_Helper<Param ## n>()(params[n])
#ifndef BOOST_PP_IS_ITERATING
#ifndef __scripting_functions_hpp__
#define __scripting_functions_hpp__
#include "scripting_object.hpp"
#include "scripting_type_info.hpp"
@@ -10,29 +16,6 @@
#include <stdexcept>
#include <vector>
template<typename Ret>
std::vector<Type_Info> build_param_type_list(const boost::function<Ret ()> &f)
{
return std::vector<Type_Info>();
}
template<typename Ret, typename Param1>
std::vector<Type_Info> build_param_type_list(const boost::function<Ret (Param1)> &f)
{
std::vector<Type_Info> ti;
ti.push_back(Get_Type_Info<Param1>()());
return ti;
}
template<typename Ret, typename Param1, typename Param2>
std::vector<Type_Info> build_param_type_list(const boost::function<Ret (Param1, Param2)> &f)
{
std::vector<Type_Info> ti;
ti.push_back(Get_Type_Info<Param1>()());
ti.push_back(Get_Type_Info<Param2>()());
return ti;
}
// handle_return implementations
template<typename Ret>
struct Handle_Return
@@ -63,31 +46,16 @@ struct Handle_Return<void>
};
// call_func implementations todo: handle reference return types
// to be made variadic
template<typename Ret, typename Param1, typename Param2>
Scripting_Object call_func(const boost::function<Ret (Param1, Param2)> &f, const std::vector<Scripting_Object> &params)
// Build param type list (variadic)
template<typename Ret>
std::vector<Type_Info> build_param_type_list(const boost::function<Ret ()> &f)
{
if (params.size() != 2)
{
throw std::range_error("Incorrect number of parameters");
} else {
return Handle_Return<Ret>()(boost::bind(f, Cast_Helper<Param1>()(params[0]), Cast_Helper<Param2>()(params[1])));
}
}
template<typename Ret, typename Param1>
Scripting_Object call_func(const boost::function<Ret (Param1)> &f, const std::vector<Scripting_Object> &params)
{
if (params.size() != 1)
{
throw std::range_error("Incorrect number of parameters");
} else {
return Handle_Return<Ret>()(boost::bind(f, Cast_Helper<Param1>()(params[0])));
}
std::vector<Type_Info> ti;
ti.push_back(Get_Type_Info<Ret>()());
return ti;
}
// call_func implementations (variadic)
template<typename Ret>
Scripting_Object call_func(const boost::function<Ret ()> &f, const std::vector<Scripting_Object> &params)
{
@@ -100,6 +68,34 @@ Scripting_Object call_func(const boost::function<Ret ()> &f, const std::vector<S
}
struct Param_List_Builder
{
Param_List_Builder &operator<<(const Scripting_Object &so)
{
objects.push_back(so);
return *this;
}
template<typename T>
Param_List_Builder &operator<<(T t)
{
objects.push_back(Scripting_Object(t));
return *this;
}
operator const std::vector<Scripting_Object> &() const
{
return objects;
}
std::vector<Scripting_Object> objects;
};
#define BOOST_PP_ITERATION_LIMITS ( 1, 10 )
#define BOOST_PP_FILENAME_1 "scripting_functions.hpp"
#include BOOST_PP_ITERATE()
class Function_Handler
{
@@ -132,26 +128,33 @@ class Function_Handler_Impl : public Function_Handler
Func m_f;
};
std::vector<Scripting_Object> build_param_list(const Scripting_Object &so)
# endif
#else
# define n BOOST_PP_ITERATION()
template<typename Ret, BOOST_PP_ENUM_PARAMS(n, typename Param) >
std::vector<Type_Info> build_param_type_list(const boost::function<Ret (BOOST_PP_ENUM_PARAMS(n, Param))> &f)
{
std::vector<Scripting_Object> sos;
sos.push_back(so);
return sos;
std::vector<Type_Info> ti;
ti.push_back(Get_Type_Info<Ret>()());
BOOST_PP_REPEAT(n, gettypeinfo, ~)
return ti;
}
std::vector<Scripting_Object> build_param_list(const Scripting_Object &so1, const Scripting_Object &so2)
template<typename Ret, BOOST_PP_ENUM_PARAMS(n, typename Param)>
Scripting_Object call_func(const boost::function<Ret (BOOST_PP_ENUM_PARAMS(n, Param))> &f,
const std::vector<Scripting_Object> &params)
{
std::vector<Scripting_Object> sos;
sos.push_back(so1);
sos.push_back(so2);
return sos;
}
std::vector<Scripting_Object> build_param_list(const Scripting_Object &so1, const Scripting_Object &so2, const Scripting_Object &so3)
{
std::vector<Scripting_Object> sos;
sos.push_back(so1);
sos.push_back(so2);
sos.push_back(so3);
return sos;
if (params.size() != n)
{
throw std::range_error("Incorrect number of parameters");
} else {
return Handle_Return<Ret>()(boost::bind(f BOOST_PP_REPEAT(n, casthelper, ~)));
}
}
#endif

4
typelesscpp/test.cpp
View File

@@ -78,10 +78,10 @@ int main()
(*method1)(sos);
Scripting_Object o = (*method1)(sos);
(*ss.get_function("print"))(build_param_list(ss.get_object("str")));
(*ss.get_function("print"))(Param_List_Builder() << ss.get_object("str"));
//Add new dynamically created object from registered "Test" constructor
ss.add_object("testobj2", (*ss.get_function("Test"))(build_param_list(Scripting_Object(std::string("Yo")))));
ss.add_object("testobj2", (*ss.get_function("Test"))(Param_List_Builder() << std::string("Yo")));
std::cout << Cast_Helper<int>()(o) << std::endl;