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thread_pool push result type fix

master
Daniel Kolesa 2017-03-18 20:02:03 +01:00
parent 795234c476
commit f07eefaf5a
1 changed files with 10 additions and 1 deletions
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11
ostd/thread_pool.hh
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@ -18,6 +18,13 @@
namespace ostd {
namespace detail {
template<typename T>
using task_result_of = std::conditional_t<
std::is_same_v<T, void>, void, std::future<T>
>;
}
struct thread_pool {
void start(size_t size = std::thread::hardware_concurrency()) {
p_running = true;
@ -52,7 +59,9 @@ struct thread_pool {
}
template<typename F, typename ...A>
auto push(F &&func, A &&...args) -> std::result_of_t<F(A...)> {
auto push(F &&func, A &&...args) ->
detail::task_result_of<std::result_of_t<F(A...)>>
{
using R = std::result_of_t<F(A...)>;
if constexpr(std::is_same_v<R, void>) {
/* void-returning funcs return void */