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python: Tweaking how the new wrappers will work

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-07-02 14:14:08 +02:00
parent cd20284347
commit fe1ad5b086
1 changed files with 33 additions and 14 deletions
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47
common/pywrappers.h
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@ -47,38 +47,57 @@ template <typename T> struct ContextualWrapper
typedef T base_type;
};
template <typename T> ContextualWrapper<T> wrap_ctx(Context *ctx, T x) { return ContextualWrapper<T>(ctx, x); }
// Dummy class, to be implemented by users
template <typename T> class string_converter;
// Action options
class do_nothing
template <typename T> class do_nothing
{
template <typename T> T operator()(Context *ctx, T x) { return x; }
T operator()(Context *ctx, T x) { return x; }
template <typename T> using ret_type = T;
template <typename T> using arg_type = T;
using ret_type = T;
using arg_type = T;
};
class wrap_context
template <typename T> class wrap_context
{
template <typename T> ContextualWrapper<T> operator()(Context *ctx, T x) { return ContextualWrapper<T>(ctx, x); }
template <typename T> using ret_type = ContextualWrapper<T>;
ContextualWrapper<T> operator()(Context *ctx, T x) { return ContextualWrapper<T>(ctx, x); }
using arg_type = T;
using ret_type = ContextualWrapper<T>;
};
class unwrap_context
template <typename T> class unwrap_context
{
template <typename T> T operator()(Context *ctx, ContextualWrapper<T> x) { return x.base; }
T operator()(Context *ctx, ContextualWrapper<T> x) { return x.base; }
using ret_type = T;
using arg_type = ContextualWrapper<T>;
};
template <typename T> using arg_type = ContextualWrapper<T>;
template <typename T> class conv_from_string
{
T operator()(Context *ctx, std::string x) { return string_converter<T>().from_str(ctx, x); }
using ret_type = T;
using arg_type = std::string;
};
template <typename T> class conv_to_string
{
std::string operator()(Context *ctx, T x) { return string_converter<T>().to_str(ctx, x); }
using ret_type = std::string;
using arg_type = T;
};
// Function wrapper
// Example: one parameter, one return
template <typename Class, typename FuncT, FuncT fn, typename rv_conv, typename arg1_conv> struct function_wrapper
{
using result_type = typename boost::function_types::result_type<FuncT>::type;
using arg1_type = typename boost::mpl::at_c<boost::function_types::parameter_types<FuncT>, 1>::type;
using class_type = ContextualWrapper<Class>;
using conv_result_type = typename rv_conv::ret_type;
using conv_arg1_type = typename arg1_conv::arg_type;
static typename rv_conv::ret_type wrapped_fn(class_type &cls, typename arg1_conv::arg_type arg1)
static conv_result_type wrapped_fn(class_type &cls, conv_arg1_type arg1)
{
return rv_conv()(cls.ctx, cls.base.*fn(arg1_conv()(cls.ctx, arg1)));
}