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Make the C++ Signal class templated on the arguments

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This commit is contained in:
Olivier Goffart 2020-09-08 13:11:32 +02:00
parent e997dff094
commit a192ffe283
4 changed files with 43 additions and 29 deletions
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18
api/sixtyfps-cpp/include/sixtyfps_signals.h
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@ -8,12 +8,12 @@
Please contact info@sixtyfps.io for more information.
LICENSE END */
#pragma once
#include <string_view>
#include <tuple>
#include "sixtyfps_properties_internal.h"
namespace sixtyfps {
// template<typename... Args>
template<typename... Arg>
struct Signal
{
Signal() { cbindgen_private::sixtyfps_signal_init(&inner); }
@ -27,18 +27,22 @@ struct Signal
{
cbindgen_private::sixtyfps_signal_set_handler(
&inner,
[](void *user_data) {
(*reinterpret_cast<F *>(user_data))();
[](void *user_data, const void *arg) {
std::apply(*reinterpret_cast<F *>(user_data),
*reinterpret_cast<const Tuple*>(arg));
},
new F(std::move(binding)), [](void *user_data) { delete reinterpret_cast<F *>(user_data); });
new F(std::move(binding)),
[](void *user_data) { delete reinterpret_cast<F *>(user_data); });
}
void emit() const
void emit(const Arg &...arg) const
{
cbindgen_private::sixtyfps_signal_emit(&inner);
Tuple tuple{arg...};
cbindgen_private::sixtyfps_signal_emit(&inner, &tuple);
}
private:
using Tuple = std::tuple<Arg...>;
cbindgen_private::SignalOpaque inner;
};
}