docs/concepttf_1_1StaticTaskLike.html
| | Taskflow: A General-purpose Task-parallel Programming System |
Loading...
Searching...
No Matches
tf::StaticTaskLike Concept Reference
determines if a callable is a static task More...
#include <taskflow/core/task.hpp>
template<typename C>
concept tf::StaticTaskLike = std::invocable<C> &&
std::same_as<std::invoke_result_t<C>, void>
determines if a callable is a static task
Definition task.hpp:140
determines if a callable is a static task
A static task is a callable object that takes no arguments and returns void. It is constructible from std::function<void()>.
Requirements
Examples
// Valid static tasks (satisfy StaticTaskLike)
// Simple lambda capturing nothing
static_assert(StaticTaskLike<decltype(static_task1)>);
// Lambda capturing variables
int x = 10;
auto static_task2 = x { std::cout << x << '\n'; };
static_assert(StaticTaskLike<decltype(static_task2)>);
// Function object (functor)
struct SimpleTask {
void operator()() const { std::cout << "task\n"; }
};
static_assert(StaticTaskLike<SimpleTask>);
// Free function
void my_task() { std::cout << "free function task\n"; }
static_assert(StaticTaskLike<decltype(&my_task)>);
// Use in taskflow
tf::Taskflow taskflow;
auto task = taskflow.emplace(static_task1).name("static");
Task emplace(C &&callable)
creates a static task
Definition flow_builder.hpp:1571
const std::string & name() const
queries the name of the task
Definition task.hpp:1388
class to create a taskflow object
Definition taskflow.hpp:64
Invalid Examples
// Invalid: takes parameters
auto task_with_param = [](int a) { std::cout << a << '\n'; };
// static_assert(StaticTaskLike<decltype(task_with_param)>); // FAILS
// Invalid: returns non-void
auto task_returns_int = { return 42; };
// static_assert(StaticTaskLike<decltype(task_returns_int)>); // FAILS