include/boost/capy/when_all.hpp

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1			//
2			// Copyright (c) 2026 Steve Gerbino
3			//
4			// Distributed under the Boost Software License, Version 1.0. (See accompanying
5			// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6			//
7			// Official repository: https://github.com/cppalliance/capy
8			//
9
10			#ifndef BOOST_CAPY_WHEN_ALL_HPP
11			#define BOOST_CAPY_WHEN_ALL_HPP
12
13			#include <boost/capy/detail/config.hpp>
14			#include <boost/capy/detail/void_to_monostate.hpp>
15			#include <boost/capy/concept/executor.hpp>
16			#include <boost/capy/concept/io_awaitable.hpp>
17			#include <coroutine>
18			#include <boost/capy/ex/io_env.hpp>
19			#include <boost/capy/ex/frame_allocator.hpp>
20			#include <boost/capy/task.hpp>
21
22			#include <array>
23			#include <atomic>
24			#include <exception>
25			#include <optional>
26			#include <ranges>
27			#include <stdexcept>
28			#include <stop_token>
29			#include <tuple>
30			#include <type_traits>
31			#include <utility>
32			#include <vector>
33
34			namespace boost {
35			namespace capy {
36
37			namespace detail {
38
39			/** Holds the result of a single task within when_all.
40			*/
41			template<typename T>
42			struct result_holder
43			{
44			std::optional<T> value_;
45
46		64x	void set(T v)
47			{
48		64x	value_ = std::move(v);
49		64x	}
50
51		57x	T get() &&
52			{
53		57x	return std::move(*value_);
54			}
55			};
56
57			/** Specialization for void tasks - returns monostate to preserve index mapping.
58			*/
59			template<>
60			struct result_holder<void>
61			{
62		43x	std::monostate get() && { return {}; }
63			};
64
65			/** Core shared state for when_all operations.
66
67			Contains all members and methods common to both heterogeneous (variadic)
68			and homogeneous (range) when_all implementations. State classes embed
69			this via composition to avoid CRTP destructor ordering issues.
70
71			@par Thread Safety
72			Atomic operations protect exception capture and completion count.
73			*/
74			struct when_all_core
75			{
76			std::atomic<std::size_t> remaining_count_;
77
78			// Exception storage - first error wins, others discarded
79			std::atomic<bool> has_exception_{false};
80			std::exception_ptr first_exception_;
81
82			std::stop_source stop_source_;
83
84			// Bridges parent's stop token to our stop_source
85			struct stop_callback_fn
86			{
87			std::stop_source* source_;
88		4x	void operator()() const { source_->request_stop(); }
89			};
90			using stop_callback_t = std::stop_callback<stop_callback_fn>;
91			std::optional<stop_callback_t> parent_stop_callback_;
92
93			std::coroutine_handle<> continuation_;
94			io_env const* caller_env_ = nullptr;
95
96		71x	explicit when_all_core(std::size_t count) noexcept
97		71x	: remaining_count_(count)
98			{
99		71x	}
100
101			/** Capture an exception (first one wins). */
102		23x	void capture_exception(std::exception_ptr ep)
103			{
104		23x	bool expected = false;
105	2/2 ✓ Branch 1 taken 20 times. ✓ Branch 2 taken 3 times.	23x	if(has_exception_.compare_exchange_strong(
106			expected, true, std::memory_order_relaxed))
107		20x	first_exception_ = ep;
108		23x	}
109			};
110
111			/** Shared state for heterogeneous when_all (variadic overload).
112
113			@tparam Ts The result types of the tasks.
114			*/
115			template<typename... Ts>
116			struct when_all_state
117			{
118			static constexpr std::size_t task_count = sizeof...(Ts);
119
120			when_all_core core_;
121			std::tuple<result_holder<Ts>...> results_;
122			std::array<std::coroutine_handle<>, task_count> runner_handles_{};
123
124		62x	when_all_state()
125		62x	: core_(task_count)
126			{
127		62x	}
128			};
129
130			/** Shared state for homogeneous when_all (range overload).
131
132			Stores all results in a vector indexed by task position.
133
134			@tparam T The common result type of all tasks.
135			*/
136			template<typename T>
137			struct when_all_homogeneous_state
138			{
139			when_all_core core_;
140			std::vector<std::optional<T>> results_;
141			std::vector<std::coroutine_handle<>> runner_handles_;
142
143		7x	explicit when_all_homogeneous_state(std::size_t count)
144		7x	: core_(count)
145	2/2 boost::capy::detail::when_all_homogeneous_state<int>::when_all_homogeneous_state(unsigned long): ✓ Branch 1 taken 6 times. boost::capy::detail::when_all_homogeneous_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::when_all_homogeneous_state(unsigned long): ✓ Branch 1 taken 1 time.	14x	, results_(count)
146	2/2 boost::capy::detail::when_all_homogeneous_state<int>::when_all_homogeneous_state(unsigned long): ✓ Branch 1 taken 6 times. boost::capy::detail::when_all_homogeneous_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::when_all_homogeneous_state(unsigned long): ✓ Branch 1 taken 1 time.	14x	, runner_handles_(count)
147			{
148		7x	}
149
150		16x	void set_result(std::size_t index, T value)
151			{
152		16x	results_[index].emplace(std::move(value));
153		16x	}
154			};
155
156			/** Specialization for void tasks (no result storage). */
157			template<>
158			struct when_all_homogeneous_state<void>
159			{
160			when_all_core core_;
161			std::vector<std::coroutine_handle<>> runner_handles_;
162
163		2x	explicit when_all_homogeneous_state(std::size_t count)
164		2x	: core_(count)
165	1/1 ✓ Branch 1 taken 2 times.	4x	, runner_handles_(count)
166			{
167		2x	}
168			};
169
170			/** Wrapper coroutine that intercepts task completion for when_all.
171
172			Parameterized on StateType to work with both heterogeneous (variadic)
173			and homogeneous (range) state types. All state types expose their
174			shared members through a `core_` member of type when_all_core.
175
176			@tparam StateType The state type (when_all_state or when_all_homogeneous_state).
177			*/
178			template<typename StateType>
179			struct when_all_runner
180			{
181			struct promise_type
182			{
183			StateType* state_ = nullptr;
184			std::size_t index_ = 0;
185			io_env env_;
186
187		159x	when_all_runner get_return_object() noexcept
188			{
189			return when_all_runner(
190		159x	std::coroutine_handle<promise_type>::from_promise(*this));
191			}
192
193		159x	std::suspend_always initial_suspend() noexcept
194			{
195		159x	return {};
196			}
197
198		159x	auto final_suspend() noexcept
199			{
200			struct awaiter
201			{
202			promise_type* p_;
203		60x	bool await_ready() const noexcept { return false; }
204		60x	auto await_suspend(std::coroutine_handle<> h) noexcept
205			{
206		60x	auto& core = p_->state_->core_;
207		60x	auto* counter = &core.remaining_count_;
208		60x	auto* caller_env = core.caller_env_;
209		60x	auto cont = core.continuation_;
210
211		60x	h.destroy();
212
213		60x	auto remaining = counter->fetch_sub(1, std::memory_order_acq_rel);
214	6/6 boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<boost::capy::io_result<>, void> >::promise_type::final_suspend()::awaiter::await_suspend(std::__n4861::coroutine_handle<void>): ✓ Branch 0 taken 1 time. ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int> >::promise_type::final_suspend()::awaiter::await_suspend(std::__n4861::coroutine_handle<void>): ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 4 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void> >::promise_type::final_suspend()::awaiter::await_suspend(std::__n4861::coroutine_handle<void>): ✓ Branch 0 taken 25 times. ✓ Branch 1 taken 25 times.	60x	if(remaining == 1)
215		30x	return detail::symmetric_transfer(caller_env->executor.dispatch(cont));
216		30x	return detail::symmetric_transfer(std::noop_coroutine());
217			}
218		✗	void await_resume() const noexcept {}
219			};
220		159x	return awaiter{this};
221			}
222
223		136x	void return_void() noexcept {}
224
225		23x	void unhandled_exception()
226			{
227		23x	state_->core_.capture_exception(std::current_exception());
228		23x	state_->core_.stop_source_.request_stop();
229		23x	}
230
231			template<class Awaitable>
232			struct transform_awaiter
233			{
234			std::decay_t<Awaitable> a_;
235			promise_type* p_;
236
237		159x	bool await_ready() { return a_.await_ready(); }
238		159x	decltype(auto) await_resume() { return a_.await_resume(); }
239
240			template<class Promise>
241		158x	auto await_suspend(std::coroutine_handle<Promise> h)
242			{
243			using R = decltype(a_.await_suspend(h, &p_->env_));
244			if constexpr (std::is_same_v<R, std::coroutine_handle<>>)
245		158x	return detail::symmetric_transfer(a_.await_suspend(h, &p_->env_));
246			else
247			return a_.await_suspend(h, &p_->env_);
248			}
249			};
250
251			template<class Awaitable>
252		159x	auto await_transform(Awaitable&& a)
253			{
254			using A = std::decay_t<Awaitable>;
255			if constexpr (IoAwaitable<A>)
256			{
257			return transform_awaiter<Awaitable>{
258		318x	std::forward<Awaitable>(a), this};
259			}
260			else
261			{
262			static_assert(sizeof(A) == 0, "requires IoAwaitable");
263			}
264		159x	}
265			};
266
267			std::coroutine_handle<promise_type> h_;
268
269		159x	explicit when_all_runner(std::coroutine_handle<promise_type> h) noexcept
270		159x	: h_(h)
271			{
272		159x	}
273
274			// Enable move for all clang versions - some versions need it
275			when_all_runner(when_all_runner&& other) noexcept
276			: h_(std::exchange(other.h_, nullptr))
277			{
278			}
279
280			when_all_runner(when_all_runner const&) = delete;
281			when_all_runner& operator=(when_all_runner const&) = delete;
282			when_all_runner& operator=(when_all_runner&&) = delete;
283
284		159x	auto release() noexcept
285			{
286		159x	return std::exchange(h_, nullptr);
287			}
288			};
289
290			/** Create a runner coroutine for a single awaitable (variadic path).
291
292			Uses compile-time index for tuple-based result storage.
293			*/
294			template<std::size_t Index, IoAwaitable Awaitable, typename... Ts>
295			when_all_runner<when_all_state<Ts...>>
296	44/44 boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<boost::capy::io_result<>, boost::capy::io_result<> > > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<boost::capy::io_result<> >, boost::capy::io_result<>, boost::capy::io_result<> >(boost::capy::task<boost::capy::io_result<> >, boost::capy::detail::when_all_state<boost::capy::io_result<>, boost::capy::io_result<> >): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<boost::capy::io_result<>, boost::capy::io_result<> > > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<boost::capy::io_result<> >, boost::capy::io_result<>, boost::capy::io_result<> >(boost::capy::task<boost::capy::io_result<> >, boost::capy::detail::when_all_state<boost::capy::io_result<>, boost::capy::io_result<> >): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<boost::capy::io_result<>, int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::async_event::wait_awaiter, boost::capy::io_result<>, int>(boost::capy::async_event::wait_awaiter, boost::capy::detail::when_all_state<boost::capy::io_result<>, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<boost::capy::io_result<>, int> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<int>, boost::capy::io_result<>, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<boost::capy::io_result<>, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<boost::capy::io_result<>, void> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::async_event::wait_awaiter, boost::capy::io_result<>, void>(boost::capy::async_event::wait_awaiter, boost::capy::detail::when_all_state<boost::capy::io_result<>, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<boost::capy::io_result<>, void> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<void>, boost::capy::io_result<>, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<boost::capy::io_result<>, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, boost::capy::io_result<unsigned long> > > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int, boost::capy::io_result<unsigned long> >(boost::capy::task<int>, boost::capy::detail::when_all_state<int, boost::capy::io_result<unsigned long> >): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, boost::capy::io_result<unsigned long> > > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<boost::capy::io_result<unsigned long> >, int, boost::capy::io_result<unsigned long> >(boost::capy::task<boost::capy::io_result<unsigned long> >, boost::capy::detail::when_all_state<int, boost::capy::io_result<unsigned long> >): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<2ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<3ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<4ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<5ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<6ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int> > boost::capy::detail::make_when_all_runner<7ul, boost::capy::task<int>, int, int, int, int, int, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int>): ✓ Branch 1 taken 4 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<int>, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int>): ✓ Branch 1 taken 4 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int, int> > boost::capy::detail::make_when_all_runner<2ul, boost::capy::task<int>, int, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int, int>): ✓ Branch 1 taken 4 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int>): ✓ Branch 1 taken 17 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, int> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<int>, int, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, int>): ✓ Branch 1 taken 17 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>(boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::detail::when_all_state<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void> > boost::capy::detail::make_when_all_runner<2ul, boost::capy::task<void>, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, void, int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int, void, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, void, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, void, int> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<void>, int, void, int>(boost::capy::task<void>, boost::capy::detail::when_all_state<int, void, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, void, int> > boost::capy::detail::make_when_all_runner<2ul, boost::capy::task<int>, int, void, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, void, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, void> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int, void>(boost::capy::task<int>, boost::capy::detail::when_all_state<int, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int, void> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<void>, int, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<int, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<int>, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<int>): ✓ Branch 1 taken 2 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::detail::when_all_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::detail::when_all_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > boost::capy::detail::make_when_all_runner<2ul, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::detail::when_all_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<std::vector<int, std::allocator<int> >, int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<std::vector<int, std::allocator<int> > >, std::vector<int, std::allocator<int> >, int>(boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::detail::when_all_state<std::vector<int, std::allocator<int> >, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<std::vector<int, std::allocator<int> >, int> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<int>, std::vector<int, std::allocator<int> >, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<std::vector<int, std::allocator<int> >, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, int> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::stop_only_awaitable, void, int>(boost::capy::stop_only_awaitable, boost::capy::detail::when_all_state<void, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, int> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<int>, void, int>(boost::capy::task<int>, boost::capy::detail::when_all_state<void, int>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void, void> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<void>, void, void, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<void, void, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void, void> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<void>, void, void, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<void, void, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void, void> > boost::capy::detail::make_when_all_runner<2ul, boost::capy::task<void>, void, void, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<void, void, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::stop_only_awaitable, void, void>(boost::capy::stop_only_awaitable, boost::capy::detail::when_all_state<void, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void> > boost::capy::detail::make_when_all_runner<0ul, boost::capy::task<void>, void, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<void, void>): ✓ Branch 1 taken 26 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::stop_only_awaitable, void, void>(boost::capy::stop_only_awaitable, boost::capy::detail::when_all_state<void, void>): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_state<void, void> > boost::capy::detail::make_when_all_runner<1ul, boost::capy::task<void>, void, void>(boost::capy::task<void>, boost::capy::detail::when_all_state<void, void>): ✓ Branch 1 taken 26 times.	136x	make_when_all_runner(Awaitable inner, when_all_state<Ts...>* state)
297			{
298			using T = awaitable_result_t<Awaitable>;
299			if constexpr (std::is_void_v<T>)
300			{
301			co_await std::move(inner);
302			}
303			else
304			{
305			std::get<Index>(state->results_).set(co_await std::move(inner));
306			}
307		272x	}
308
309			/** Create a runner coroutine for a single awaitable (range path).
310
311			Uses runtime index for vector-based result storage.
312			*/
313			template<IoAwaitable Awaitable, typename StateType>
314			when_all_runner<StateType>
315	3/3 boost::capy::detail::when_all_runner<boost::capy::detail::when_all_homogeneous_state<int> > boost::capy::detail::make_when_all_homogeneous_runner<boost::capy::task<int>, boost::capy::detail::when_all_homogeneous_state<int> >(boost::capy::task<int>, boost::capy::detail::when_all_homogeneous_state<int>, unsigned long): ✓ Branch 1 taken 15 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_homogeneous_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > boost::capy::detail::make_when_all_homogeneous_runner<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::detail::when_all_homogeneous_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >(boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::detail::when_all_homogeneous_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, unsigned long): ✓ Branch 1 taken 3 times. boost::capy::detail::when_all_runner<boost::capy::detail::when_all_homogeneous_state<void> > boost::capy::detail::make_when_all_homogeneous_runner<boost::capy::task<void>, boost::capy::detail::when_all_homogeneous_state<void> >(boost::capy::task<void>, boost::capy::detail::when_all_homogeneous_state<void>*, unsigned long): ✓ Branch 1 taken 5 times.	23x	make_when_all_homogeneous_runner(Awaitable inner, StateType* state, std::size_t index)
316			{
317			using T = awaitable_result_t<Awaitable>;
318			if constexpr (std::is_void_v<T>)
319			{
320			co_await std::move(inner);
321			}
322			else
323			{
324			state->set_result(index, co_await std::move(inner));
325			}
326		46x	}
327
328			/** Internal awaitable that launches all variadic runner coroutines.
329
330			CRITICAL: If the last task finishes synchronously then the parent
331			coroutine resumes, destroying its frame, and destroying this object
332			prior to the completion of await_suspend. Therefore, await_suspend
333			must ensure `this` cannot be referenced after calling `launch_one`
334			for the last time.
335			*/
336			template<IoAwaitable... Awaitables>
337			class when_all_launcher
338			{
339			using state_type = when_all_state<awaitable_result_t<Awaitables>...>;
340
341			std::tuple<Awaitables...>* awaitables_;
342			state_type* state_;
343
344			public:
345		62x	when_all_launcher(
346			std::tuple<Awaitables...>* awaitables,
347			state_type* state)
348		62x	: awaitables_(awaitables)
349		62x	, state_(state)
350			{
351		62x	}
352
353		62x	bool await_ready() const noexcept
354			{
355		62x	return sizeof...(Awaitables) == 0;
356			}
357
358		62x	std::coroutine_handle<> await_suspend(std::coroutine_handle<> continuation, io_env const* caller_env)
359			{
360		62x	state_->core_.continuation_ = continuation;
361		62x	state_->core_.caller_env_ = caller_env;
362
363	18/34 boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 2 times. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 6 times. ✓ Branch 2 taken 11 times. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 26 times. boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time.	62x	if(caller_env->stop_token.stop_possible())
364			{
365		16x	state_->core_.parent_stop_callback_.emplace(
366		8x	caller_env->stop_token,
367		8x	when_all_core::stop_callback_fn{&state_->core_.stop_source_});
368
369	4/34 boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 4 times. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✗ Branch 1 not taken. ✗ Branch 2 not taken.	8x	if(caller_env->stop_token.stop_requested())
370		4x	state_->core_.stop_source_.request_stop();
371			}
372
373		62x	auto token = state_->core_.stop_source_.get_token();
374		✗	[&]<std::size_t... Is>(std::index_sequence<Is...>) {
375	6/6 auto boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 2 taken 1 time. ✓ Branch 6 taken 1 time. auto boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 2 taken 4 times. ✓ Branch 6 taken 4 times. auto boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 2 taken 25 times. ✓ Branch 6 taken 25 times.	30x	(..., launch_one<Is>(caller_env->executor, token));
376	19/19 auto boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 1 taken 1 time. auto boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 1 taken 4 times. auto boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 1 taken 25 times. boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 2 times. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 13 times. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 4 times. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✓ Branch 1 taken 1 time.	62x	}(std::index_sequence_for<Awaitables...>{});
377
378		124x	return std::noop_coroutine();
379		62x	}
380
381		62x	void await_resume() const noexcept
382			{
383		62x	}
384
385			private:
386			template<std::size_t I>
387		136x	void launch_one(executor_ref caller_ex, std::stop_token token)
388			{
389	44/44 void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 2 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 17 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 17 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 4 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 4 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 4 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<3ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<4ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<5ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<6ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<7ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 26 times. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 26 times. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 2 taken 1 time.	136x	auto runner = make_when_all_runner<I>(
390		136x	std::move(std::get<I>(*awaitables_)), state_);
391
392		136x	auto h = runner.release();
393		136x	h.promise().state_ = state_;
394		136x	h.promise().env_ = io_env{caller_ex, token, state_->core_.caller_env_->frame_allocator};
395
396		136x	std::coroutine_handle<> ch{h};
397		136x	state_->runner_handles_[I] = ch;
398	44/44 void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::stop_only_awaitable, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 2 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 17 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 17 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 4 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 4 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 4 times. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<3ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<4ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<5ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<6ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >::launch_one<7ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 26 times. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 26 times. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::launch_one<0ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::launch_one<1ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time. void boost::capy::detail::when_all_launcher<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >::launch_one<2ul>(boost::capy::executor_ref, std::stop_token): ✓ Branch 1 taken 1 time.	136x	state_->core_.caller_env_->executor.post(ch);
399		272x	}
400			};
401
402			/** Helper to extract a single result from state.
403			This is a separate function to work around a GCC-11 ICE that occurs
404			when using nested immediately-invoked lambdas with pack expansion.
405			*/
406			template<std::size_t I, typename... Ts>
407		100x	auto extract_single_result(when_all_state<Ts...>& state)
408			{
409		100x	return std::move(std::get<I>(state.results_)).get();
410			}
411
412			/** Extract all results from state as a tuple.
413			*/
414			template<typename... Ts>
415		45x	auto extract_results(when_all_state<Ts...>& state)
416			{
417		45x	return [&]<std::size_t... Is>(std::index_sequence<Is...>) {
418	3/3 auto boost::capy::detail::extract_results<boost::capy::io_result<>, void>(boost::capy::detail::when_all_state<boost::capy::io_result<>, void>&)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 2 taken 1 time. auto boost::capy::detail::extract_results<int, int>(boost::capy::detail::when_all_state<int, int>&)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 1 taken 4 times. ✓ Branch 4 taken 4 times.	21x	return std::tuple(extract_single_result<Is>(state)...);
419	17/18 auto boost::capy::detail::extract_results<boost::capy::io_result<>, boost::capy::io_result<> >(boost::capy::detail::when_all_state<boost::capy::io_result<>, boost::capy::io_result<> >&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<boost::capy::io_result<>, int>(boost::capy::detail::when_all_state<boost::capy::io_result<>, int>&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<boost::capy::io_result<>, void>(boost::capy::detail::when_all_state<boost::capy::io_result<>, void>&)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<int, boost::capy::io_result<unsigned long> >(boost::capy::detail::when_all_state<int, boost::capy::io_result<unsigned long> >&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<int, int, int, int, int, int, int, int>(boost::capy::detail::when_all_state<int, int, int, int, int, int, int, int>&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<int, int, int>(boost::capy::detail::when_all_state<int, int, int>&): ✓ Branch 1 taken 2 times. auto boost::capy::detail::extract_results<int, int>(boost::capy::detail::when_all_state<int, int>&): ✓ Branch 1 taken 8 times. auto boost::capy::detail::extract_results<int, int>(boost::capy::detail::when_all_state<int, int>&)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 1 taken 4 times. auto boost::capy::detail::extract_results<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>(boost::capy::detail::when_all_state<int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void>&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<int, void, int>(boost::capy::detail::when_all_state<int, void, int>&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<int, void>(boost::capy::detail::when_all_state<int, void>&): ✗ Branch 1 not taken. auto boost::capy::detail::extract_results<int>(boost::capy::detail::when_all_state<int>&): ✓ Branch 1 taken 2 times. auto boost::capy::detail::extract_results<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(boost::capy::detail::when_all_state<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<std::vector<int, std::allocator<int> >, int>(boost::capy::detail::when_all_state<std::vector<int, std::allocator<int> >, int>&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<void, int>(boost::capy::detail::when_all_state<void, int>&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<void, void, void>(boost::capy::detail::when_all_state<void, void, void>&): ✓ Branch 1 taken 1 time. auto boost::capy::detail::extract_results<void, void>(boost::capy::detail::when_all_state<void, void>&): ✓ Branch 1 taken 2 times. auto boost::capy::detail::extract_results<void, void>(boost::capy::detail::when_all_state<void, void>&)::{lambda<unsigned long... $N0>(std::integer_sequence<unsigned long, ($N0)...>)#1}::operator()<0ul, 1ul>(std::integer_sequence<unsigned long, 0ul, 1ul>) const: ✓ Branch 1 taken 16 times.	90x	}(std::index_sequence_for<Ts...>{});
420			}
421
422			/** Launches all homogeneous runners concurrently.
423
424			Two-phase approach: create all runners first, then post all.
425			This avoids lifetime issues if a task completes synchronously.
426			*/
427			template<typename Range>
428			class when_all_homogeneous_launcher
429			{
430			using Awaitable = std::ranges::range_value_t<Range>;
431			using T = awaitable_result_t<Awaitable>;
432
433			Range* range_;
434			when_all_homogeneous_state<T>* state_;
435
436			public:
437		9x	when_all_homogeneous_launcher(
438			Range* range,
439			when_all_homogeneous_state<T>* state)
440		9x	: range_(range)
441		9x	, state_(state)
442			{
443		9x	}
444
445		9x	bool await_ready() const noexcept
446			{
447		9x	return std::ranges::empty(*range_);
448			}
449
450		9x	std::coroutine_handle<> await_suspend(std::coroutine_handle<> continuation, io_env const* caller_env)
451			{
452		9x	state_->core_.continuation_ = continuation;
453		9x	state_->core_.caller_env_ = caller_env;
454
455	4/6 boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 1 time. ✓ Branch 2 taken 5 times. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<void>, std::allocator<boost::capy::task<void> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✗ Branch 1 not taken. ✓ Branch 2 taken 2 times.	9x	if(caller_env->stop_token.stop_possible())
456			{
457		2x	state_->core_.parent_stop_callback_.emplace(
458		1x	caller_env->stop_token,
459		1x	when_all_core::stop_callback_fn{&state_->core_.stop_source_});
460
461	1/6 boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✓ Branch 2 taken 1 time. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✗ Branch 1 not taken. ✗ Branch 2 not taken. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<void>, std::allocator<boost::capy::task<void> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✗ Branch 1 not taken. ✗ Branch 2 not taken.	1x	if(caller_env->stop_token.stop_requested())
462		✗	state_->core_.stop_source_.request_stop();
463			}
464
465		9x	auto token = state_->core_.stop_source_.get_token();
466
467			// Phase 1: Create all runners without dispatching.
468		9x	std::size_t index = 0;
469	6/6 boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 4 taken 15 times. ✓ Branch 5 taken 6 times. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 4 taken 3 times. ✓ Branch 5 taken 1 time. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<void>, std::allocator<boost::capy::task<void> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✓ Branch 4 taken 5 times. ✓ Branch 5 taken 2 times.	32x	for(auto&& a : *range_)
470			{
471	3/3 boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 2 taken 15 times. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 2 taken 3 times. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<void>, std::allocator<boost::capy::task<void> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✓ Branch 2 taken 5 times.	23x	auto runner = make_when_all_homogeneous_runner(
472		23x	std::move(a), state_, index);
473
474		23x	auto h = runner.release();
475		23x	h.promise().state_ = state_;
476		23x	h.promise().index_ = index;
477		23x	h.promise().env_ = io_env{caller_env->executor, token, caller_env->frame_allocator};
478
479		23x	state_->runner_handles_[index] = std::coroutine_handle<>{h};
480		23x	++index;
481			}
482
483			// Phase 2: Post all runners. Any may complete synchronously.
484			// After last post, state_ and this may be destroyed.
485		9x	std::coroutine_handle<>* handles = state_->runner_handles_.data();
486		9x	std::size_t count = state_->runner_handles_.size();
487	6/6 boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 0 taken 15 times. ✓ Branch 1 taken 6 times. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 0 taken 3 times. ✓ Branch 1 taken 1 time. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<void>, std::allocator<boost::capy::task<void> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 2 times.	32x	for(std::size_t i = 0; i < count; ++i)
488	3/3 boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 15 times. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const): ✓ Branch 1 taken 3 times. boost::capy::detail::when_all_homogeneous_launcher<std::vector<boost::capy::task<void>, std::allocator<boost::capy::task<void> > > >::await_suspend(std::__n4861::coroutine_handle<void>, boost::capy::io_env const*): ✓ Branch 1 taken 5 times.	23x	caller_env->executor.post(handles[i]);
489
490		18x	return std::noop_coroutine();
491		32x	}
492
493		9x	void await_resume() const noexcept
494			{
495		9x	}
496			};
497
498			} // namespace detail
499
500			/** Compute the when_all result tuple type.
501
502			Void-returning tasks contribute std::monostate to preserve the
503			task-index-to-result-index mapping, matching when_any's approach.
504
505			Example: when_all_result_t<int, void, string> = std::tuple<int, std::monostate, string>
506			Example: when_all_result_t<void, void> = std::tuple<std::monostate, std::monostate>
507			*/
508			template<typename... Ts>
509			using when_all_result_t = std::tuple<void_to_monostate_t<Ts>...>;
510
511			/** Execute multiple awaitables concurrently and collect their results.
512
513			Launches all awaitables simultaneously and waits for all to complete
514			before returning. Results are collected in input order. If any
515			awaitable throws, cancellation is requested for siblings and the first
516			exception is rethrown after all awaitables complete.
517
518			@li All child awaitables run concurrently on the caller's executor
519			@li Results are returned as a tuple in input order
520			@li Void-returning awaitables contribute std::monostate to the
521			result tuple, preserving the task-index-to-result-index mapping
522			@li First exception wins; subsequent exceptions are discarded
523			@li Stop is requested for siblings on first error
524			@li Completes only after all children have finished
525
526			@par Thread Safety
527			The returned task must be awaited from a single execution context.
528			Child awaitables execute concurrently but complete through the caller's
529			executor.
530
531			@param awaitables The awaitables to execute concurrently. Each must
532			satisfy @ref IoAwaitable and is consumed (moved-from) when
533			`when_all` is awaited.
534
535			@return A task yielding a tuple of results in input order. Void tasks
536			contribute std::monostate to preserve index correspondence.
537
538			@par Example
539
540			@code
541			task<> example()
542			{
543			// Concurrent fetch, results collected in order
544			auto [user, posts] = co_await when_all(
545			fetch_user( id ), // task<User>
546			fetch_posts( id ) // task<std::vector<Post>>
547			);
548
549			// Void awaitables contribute monostate
550			auto [a, _, b] = co_await when_all(
551			fetch_int(), // task<int>
552			log_event( "start" ), // task<void> → monostate
553			fetch_str() // task<string>
554			);
555			// a is int, _ is monostate, b is string
556			}
557			@endcode
558
559			@see IoAwaitable, task
560			*/
561			template<IoAwaitable... As>
562	17/17 boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::async_event::wait_awaiter>::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::async_event::wait_awaiter>::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::async_event::wait_awaiter, boost::capy::task<int> >(boost::capy::async_event::wait_awaiter, boost::capy::task<int>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::async_event::wait_awaiter>::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::async_event::wait_awaiter>::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::async_event::wait_awaiter, boost::capy::task<void> >(boost::capy::async_event::wait_awaiter, boost::capy::task<void>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::stop_only_awaitable>::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::stop_only_awaitable>::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::stop_only_awaitable>::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::stop_only_awaitable>::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable>(boost::capy::stop_only_awaitable, boost::capy::stop_only_awaitable): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::stop_only_awaitable>::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::stop_only_awaitable>::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::stop_only_awaitable, boost::capy::task<int> >(boost::capy::stop_only_awaitable, boost::capy::task<int>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<boost::capy::io_result<> > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<boost::capy::io_result<> > >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<boost::capy::io_result<> > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<boost::capy::io_result<> > >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> > >(boost::capy::task<boost::capy::io_result<> >, boost::capy::task<boost::capy::io_result<> >): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<boost::capy::io_result<unsigned long> > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<boost::capy::io_result<unsigned long> > >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> > >(boost::capy::task<int>, boost::capy::task<boost::capy::io_result<unsigned long> >): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >(boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int> >(boost::capy::task<int>, boost::capy::task<int>, boost::capy::task<int>): ✓ Branch 1 taken 4 times. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int>, boost::capy::task<int> >(boost::capy::task<int>, boost::capy::task<int>): ✓ Branch 1 taken 17 times. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void> >(boost::capy::task<int>, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<void>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int> >(boost::capy::task<int>, boost::capy::task<void>, boost::capy::task<int>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int>, boost::capy::task<void> >(boost::capy::task<int>, boost::capy::task<void>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<int> >(boost::capy::task<int>): ✓ Branch 1 taken 2 times. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >(boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<std::vector<int, std::allocator<int> > > >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<std::vector<int, std::allocator<int> > > >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<int> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int> >(boost::capy::task<std::vector<int, std::allocator<int> > >, boost::capy::task<int>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void> >(boost::capy::task<void>, boost::capy::task<void>, boost::capy::task<void>): ✓ Branch 1 taken 1 time. boost::capy::task<std::tuple<std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type, std::conditional<is_void_v<decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>, std::monostate, decltype ((((declval<std::decay<boost::capy::task<void> >::type&>)()).await_resume)())>::type> > boost::capy::when_all<boost::capy::task<void>, boost::capy::task<void> >(boost::capy::task<void>, boost::capy::task<void>): ✓ Branch 1 taken 26 times.	62x	[[nodiscard]] auto when_all(As... awaitables)
563			-> task<when_all_result_t<awaitable_result_t<As>...>>
564			{
565			// State is stored in the coroutine frame, using the frame allocator
566			detail::when_all_state<awaitable_result_t<As>...> state;
567
568			// Store awaitables in the frame
569			std::tuple<As...> awaitable_tuple(std::move(awaitables)...);
570
571			// Launch all awaitables and wait for completion
572			co_await detail::when_all_launcher<As...>(&awaitable_tuple, &state);
573
574			// Propagate first exception if any.
575			// Safe without explicit acquire: capture_exception() is sequenced-before
576			// signal_completion()'s acq_rel fetch_sub, which synchronizes-with the
577			// last task's decrement that resumes this coroutine.
578			if(state.core_.first_exception_)
579			std::rethrow_exception(state.core_.first_exception_);
580
581			co_return detail::extract_results(state);
582		124x	}
583
584			/** Execute a range of awaitables concurrently and collect their results.
585
586			Launches all awaitables in the range simultaneously and waits for all
587			to complete. Results are collected in a vector preserving input order.
588			If any awaitable throws, cancellation is requested for siblings and
589			the first exception is rethrown after all awaitables complete.
590
591			@li All child awaitables run concurrently on the caller's executor
592			@li Results are returned as a vector in input order
593			@li First exception wins; subsequent exceptions are discarded
594			@li Stop is requested for siblings on first error
595			@li Completes only after all children have finished
596
597			@par Thread Safety
598			The returned task must be awaited from a single execution context.
599			Child awaitables execute concurrently but complete through the caller's
600			executor.
601
602			@param awaitables Range of awaitables to execute concurrently (must
603			not be empty). Each element must satisfy @ref IoAwaitable and is
604			consumed (moved-from) when `when_all` is awaited.
605
606			@return A task yielding a vector where each element is the result of
607			the corresponding awaitable, in input order.
608
609			@throws std::invalid_argument if range is empty (thrown before
610			coroutine suspends).
611			@throws Rethrows the first child exception after all children
612			complete.
613
614			@par Example
615			@code
616			task<void> example()
617			{
618			std::vector<task<Response>> requests;
619			for (auto const& url : urls)
620			requests.push_back(fetch(url));
621
622			auto responses = co_await when_all(std::move(requests));
623			}
624			@endcode
625
626			@see IoAwaitableRange, when_all
627			*/
628			template<IoAwaitableRange R>
629			requires (!std::is_void_v<awaitable_result_t<std::ranges::range_value_t<R>>>)
630	2/2 boost::capy::task<std::vector<decltype ((((declval<std::decay<std::__detail::__iter_traits::value_type>::type&>)()).await_resume)()), std::allocator<decltype ((((declval<std::decay<std::__detail::__iter_traits::value_type>::type&>)()).await_resume)())> > > boost::capy::when_all<std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > > >(std::vector<boost::capy::task<int>, std::allocator<boost::capy::task<int> > >&&): ✓ Branch 1 taken 7 times. boost::capy::task<std::vector<decltype ((((declval<std::decay<std::__detail::__iter_traits::value_type>::type&>)()).await_resume)()), std::allocator<decltype ((((declval<std::decay<std::__detail::__iter_traits::value_type>::type&>)()).await_resume)())> > > boost::capy::when_all<std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >(std::vector<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::capy::task<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&&): ✓ Branch 1 taken 1 time.	8x	[[nodiscard]] auto when_all(R&& awaitables)
631			-> task<std::vector<awaitable_result_t<std::ranges::range_value_t<R>>>>
632			{
633			using Awaitable = std::ranges::range_value_t<R>;
634			using T = awaitable_result_t<Awaitable>;
635			using OwnedRange = std::remove_cvref_t<R>;
636
637			auto count = std::ranges::size(awaitables);
638			if(count == 0)
639			throw std::invalid_argument("when_all requires at least one awaitable");
640
641			OwnedRange owned_awaitables = std::forward<R>(awaitables);
642
643			detail::when_all_homogeneous_state<T> state(count);
644
645			co_await detail::when_all_homogeneous_launcher<OwnedRange>(
646			&owned_awaitables, &state);
647
648			if(state.core_.first_exception_)
649			std::rethrow_exception(state.core_.first_exception_);
650
651			std::vector<T> results;
652			results.reserve(count);
653			for(auto& opt : state.results_)
654			results.push_back(std::move(*opt));
655
656			co_return results;
657		16x	}
658
659			/** Execute a range of void awaitables concurrently.
660
661			Launches all awaitables in the range simultaneously and waits for all
662			to complete. Since all awaitables return void, no results are collected.
663			If any awaitable throws, cancellation is requested for siblings and
664			the first exception is rethrown after all awaitables complete.
665
666			@li All child awaitables run concurrently on the caller's executor
667			@li First exception wins; subsequent exceptions are discarded
668			@li Stop is requested for siblings on first error
669			@li Completes only after all children have finished
670
671			@par Thread Safety
672			The returned task must be awaited from a single execution context.
673			Child awaitables execute concurrently but complete through the caller's
674			executor.
675
676			@param awaitables Range of void awaitables to execute concurrently
677			(must not be empty).
678
679			@throws std::invalid_argument if range is empty (thrown before
680			coroutine suspends).
681			@throws Rethrows the first child exception after all children
682			complete.
683
684			@par Example
685			@code
686			task<void> example()
687			{
688			std::vector<task<void>> jobs;
689			for (int i = 0; i < n; ++i)
690			jobs.push_back(process(i));
691
692			co_await when_all(std::move(jobs));
693			}
694			@endcode
695
696			@see IoAwaitableRange, when_all
697			*/
698			template<IoAwaitableRange R>
699			requires std::is_void_v<awaitable_result_t<std::ranges::range_value_t<R>>>
700	1/1 ✓ Branch 1 taken 3 times.	3x	[[nodiscard]] auto when_all(R&& awaitables) -> task<void>
701			{
702			using OwnedRange = std::remove_cvref_t<R>;
703
704			auto count = std::ranges::size(awaitables);
705			if(count == 0)
706			throw std::invalid_argument("when_all requires at least one awaitable");
707
708			OwnedRange owned_awaitables = std::forward<R>(awaitables);
709
710			detail::when_all_homogeneous_state<void> state(count);
711
712			co_await detail::when_all_homogeneous_launcher<OwnedRange>(
713			&owned_awaitables, &state);
714
715			if(state.core_.first_exception_)
716			std::rethrow_exception(state.core_.first_exception_);
717		6x	}
718
719			} // namespace capy
720			} // namespace boost
721
722			#endif
723