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C++: Use concepts for the invokables

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Olivier Goffart 2022-01-24 17:47:16 +01:00 • committed by Olivier Goffart
parent a3ec320bfb
commit 63cc68ea0c
4 changed files with 35 additions and 22 deletions
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9
api/cpp/include/slint_interpreter.h
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@ -670,8 +670,11 @@ public:
///
/// Note: Since the ComponentInstance holds the handler, the handler itself should not
/// capture a strong reference to the instance.
template<typename F>
bool set_callback(std::string_view name, F callback) const
// clang-format off
template<std::invocable<std::span<const Value>> F>
requires(std::is_convertible_v<std::invoke_result_t<F, std::span<const Value>>, Value>)
auto set_callback(std::string_view name, F callback) const -> bool
// clang-format on
{
using cbindgen_private::ValueOpaque;
auto actual_cb = [](void *data, cbindgen_private::Slice<ValueOpaque> arg,
@ -741,7 +744,7 @@ public:
///
/// **Note:** Only globals that are exported or re-exported from the main .slint file will
/// be accessible
template<typename F>
template<std::invocable<std::span<const Value>> F>
bool set_global_callback(std::string_view global, std::string_view name, F callback) const
{
using cbindgen_private::ValueOpaque;