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feat: add macro to teach sdbus-c++ about user-defined structs (#440)

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This introduces SDBUSCPP_REGISTER_STRUCT macro that helps clients conveniently, in one line, teach sdbus-c++ to recognize and accept their custom C++ struct types wherever D-Bus structs are expected in a D-Bus API.

The macro saves some boilerplate that would otherwise be needed on client side for every registered struct.
This commit is contained in:
Stanislav Angelovič
2024-05-06 20:14:32 +02:00
committed by GitHub
parent e62472b210
commit 14942db075
5 changed files with 154 additions and 45 deletions
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tests/unittests/Message_test.cpp
+4 -23
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@@ -89,40 +89,21 @@ namespace sdbus {
template <typename _Element, typename _Allocator>
struct sdbus::signature_of<std::list<_Element, _Allocator>>
: sdbus::signature_of<std::vector<_Element, _Allocator>>
: sdbus::signature_of<std::vector<_Element, _Allocator>>
{};
namespace my {
struct Struct
{
int i;
std::string s;
std::list<double> l;
friend bool operator==(const Struct& lhs, const Struct& rhs) = default;
};
bool operator==(const Struct& lhs, const Struct& rhs)
{
return lhs.i == rhs.i && lhs.s == rhs.s && lhs.l == rhs.l;
}
sdbus::Message& operator<<(sdbus::Message& msg, const Struct& items)
{
return msg << sdbus::Struct{std::forward_as_tuple(items.i, items.s, items.l)};
}
sdbus::Message& operator>>(sdbus::Message& msg, Struct& items)
{
sdbus::Struct s{std::forward_as_tuple(items.i, items.s, items.l)};
return msg >> s;
}
}
template <>
struct sdbus::signature_of<my::Struct>
: sdbus::signature_of<sdbus::Struct<int, std::string, std::list<double>>>
{};
SDBUSCPP_REGISTER_STRUCT(my::Struct, i, s, l);
/*-------------------------------------*/
/* -- TEST CASES -- */