generic-library/ChaiScript
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Add support for automatic conversion between chaiscript functions and boost::function. Might merit some look to see how much overhead this adds.

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This commit is contained in:
Jason Turner
2010-09-13 14:24:12 +00:00
parent cfa42158af
commit 10986c159f
6 changed files with 143 additions and 28 deletions
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4
CMakeLists.txt
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@@ -118,6 +118,10 @@ IF(BUILD_TESTING)
target_link_libraries(functor_creation_test ${DYNAMIC_LOADER} ${Boost_LIBRARIES} ${READLINE_LIB})
add_test(NAME Functor_Creation_Test COMMAND functor_creation_test)
add_executable(functor_cast_test unittests/functor_cast_test.cpp)
target_link_libraries(functor_cast_test ${DYNAMIC_LOADER} ${Boost_LIBRARIES} ${READLINE_LIB})
add_test(NAME Functor_Cast_Test COMMAND functor_cast_test)
add_library(test_module MODULE src/test_module.cpp)
target_link_libraries(test_module ${Boost_LIBRARIES})

64
include/chaiscript/dispatchkit/boxed_cast_helper.hpp
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@@ -19,13 +19,13 @@ namespace chaiscript
{
namespace detail
{
// Cast_Helper helper classes
// Cast_Helper_Inner helper classes
/**
* Generic Cast_Helper, for casting to any type
* Generic Cast_Helper_Inner, for casting to any type
*/
template<typename Result>
struct Cast_Helper
struct Cast_Helper_Inner
{
typedef typename boost::reference_wrapper<typename boost::add_const<Result>::type > Result_Type;
@@ -51,10 +51,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a const & type
* Cast_Helper_Inner for casting to a const & type
*/
template<typename Result>
struct Cast_Helper<const Result &>
struct Cast_Helper_Inner<const Result &>
{
typedef typename boost::reference_wrapper<typename boost::add_const<Result>::type > Result_Type;
@@ -80,10 +80,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a const * type
* Cast_Helper_Inner for casting to a const * type
*/
template<typename Result>
struct Cast_Helper<const Result *>
struct Cast_Helper_Inner<const Result *>
{
typedef const Result * Result_Type;
@@ -109,10 +109,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a * type
* Cast_Helper_Inner for casting to a * type
*/
template<typename Result>
struct Cast_Helper<Result *>
struct Cast_Helper_Inner<Result *>
{
typedef Result * Result_Type;
@@ -128,10 +128,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a & type
* Cast_Helper_Inner for casting to a & type
*/
template<typename Result>
struct Cast_Helper<Result &>
struct Cast_Helper_Inner<Result &>
{
typedef typename boost::reference_wrapper<Result> Result_Type;
@@ -147,10 +147,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a boost::shared_ptr<> type
* Cast_Helper_Inner for casting to a boost::shared_ptr<> type
*/
template<typename Result>
struct Cast_Helper<typename boost::shared_ptr<Result> >
struct Cast_Helper_Inner<typename boost::shared_ptr<Result> >
{
typedef typename boost::shared_ptr<Result> Result_Type;
@@ -161,10 +161,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a boost::shared_ptr<const> type
* Cast_Helper_Inner for casting to a boost::shared_ptr<const> type
*/
template<typename Result>
struct Cast_Helper<typename boost::shared_ptr<const Result> >
struct Cast_Helper_Inner<typename boost::shared_ptr<const Result> >
{
typedef typename boost::shared_ptr<const Result> Result_Type;
@@ -180,10 +180,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a const boost::shared_ptr<> & type
* Cast_Helper_Inner for casting to a const boost::shared_ptr<> & type
*/
template<typename Result>
struct Cast_Helper<const boost::shared_ptr<Result> &>
struct Cast_Helper_Inner<const boost::shared_ptr<Result> &>
{
typedef typename boost::shared_ptr<Result> Result_Type;
@@ -194,10 +194,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a const boost::shared_ptr<const> & type
* Cast_Helper_Inner for casting to a const boost::shared_ptr<const> & type
*/
template<typename Result>
struct Cast_Helper<const boost::shared_ptr<const Result> &>
struct Cast_Helper_Inner<const boost::shared_ptr<const Result> &>
{
typedef typename boost::shared_ptr<const Result> Result_Type;
@@ -215,10 +215,10 @@ namespace chaiscript
/**
* Cast_Helper for casting to a Boxed_Value type
* Cast_Helper_Inner for casting to a Boxed_Value type
*/
template<>
struct Cast_Helper<Boxed_Value>
struct Cast_Helper_Inner<Boxed_Value>
{
typedef const Boxed_Value & Result_Type;
@@ -229,10 +229,10 @@ namespace chaiscript
};
/**
* Cast_Helper for casting to a const Boxed_Value & type
* Cast_Helper_Inner for casting to a const Boxed_Value & type
*/
template<>
struct Cast_Helper<const Boxed_Value &>
struct Cast_Helper_Inner<const Boxed_Value &>
{
typedef const Boxed_Value & Result_Type;
@@ -241,12 +241,22 @@ namespace chaiscript
return ob;
}
};
}
/**
* The exposed Cast_Helper object that by default just calls the Cast_Helper_Inner
*/
template<typename T>
struct Cast_Helper
{
typedef typename Cast_Helper_Inner<T>::Result_Type Result_Type;
static Result_Type cast(const Boxed_Value &ob)
{
return Cast_Helper_Inner<T>::cast(ob);
}
};
}
}
#endif

15
include/chaiscript/dispatchkit/boxed_pod_value.hpp
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@@ -251,8 +251,21 @@ namespace chaiscript
return Boxed_POD_Value(ob);
}
};
}
/**
* Cast_Helper for converting from Boxed_Value to Boxed_POD_Value
*/
template<>
struct Cast_Helper<const Boxed_POD_Value>
{
typedef Boxed_POD_Value Result_Type;
static Result_Type cast(const Boxed_Value &ob)
{
return Boxed_POD_Value(ob);
}
};
}
}

62
include/chaiscript/dispatchkit/function_call.hpp
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@@ -15,6 +15,9 @@
#include "proxy_functions.hpp"
#include "function_call_detail.hpp"
#include <iostream>
namespace chaiscript
{
/**
@@ -66,6 +69,65 @@ namespace chaiscript
return functor<FunctionType>(boxed_cast<Const_Proxy_Function >(bv));
}
namespace detail{
/**
* Cast helper to handle automatic casting to const boost::function &
*/
template<typename Signature>
struct Cast_Helper<const boost::function<Signature> &>
{
typedef boost::function<Signature> Result_Type;
static Result_Type cast(const Boxed_Value &ob)
{
if (ob.get_type_info().bare_equal(user_type<Const_Proxy_Function>()))
{
return functor<Signature>(ob);
} else {
return Cast_Helper_Inner<const boost::function<Signature> &>::cast(ob);
}
}
};
/**
* Cast helper to handle automatic casting to boost::function
*/
template<typename Signature>
struct Cast_Helper<boost::function<Signature> >
{
typedef boost::function<Signature> Result_Type;
static Result_Type cast(const Boxed_Value &ob)
{
if (ob.get_type_info().bare_equal(user_type<Const_Proxy_Function>()))
{
return functor<Signature>(ob);
} else {
return Cast_Helper_Inner<boost::function<Signature> >::cast(ob);
}
}
};
/**
* Cast helper to handle automatic casting to const boost::function
*/
template<typename Signature>
struct Cast_Helper<const boost::function<Signature> >
{
typedef boost::function<Signature> Result_Type;
static Result_Type cast(const Boxed_Value &ob)
{
if (ob.get_type_info().bare_equal(user_type<Const_Proxy_Function>()))
{
return functor<Signature>(ob);
} else {
return Cast_Helper_Inner<const boost::function<Signature> >::cast(ob);
}
}
};
}
}
#endif

1
include/chaiscript/dispatchkit/proxy_functions.hpp
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@@ -119,6 +119,7 @@ namespace chaiscript
&& (ti.bare_equal(user_type<Boxed_POD_Value>())
|| ti.bare_equal(bv.get_type_info())
|| dynamic_cast_converts(ti, bv.get_type_info())
|| bv.get_type_info().bare_equal(user_type<boost::shared_ptr<const Proxy_Function_Base> >())
)
)
)

25
unittests/functor_cast_test.cpp Normal file
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@@ -0,0 +1,25 @@
#include <chaiscript/utility/utility.hpp>
double test_call(const boost::function<double (int)> &f, int val)
{
return f(val);
}
int main()
{
chaiscript::ChaiScript chai;
chai.add(chaiscript::fun(&test_call), "test_call");
chai.eval("def func(i) { return i * 3.5; };");
double d = chai.eval<double>("test_call(func, 3)");
if (d == 3 * 3.5)
{
return EXIT_SUCCESS;
} else {
return EXIT_FAILURE;
}
}