From 55dd66d8dd773ed98580d1fac0e15da6244d35b8 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Tue, 19 Dec 2023 14:04:04 +0100
Subject: moving async to c++ folder

---
 modules/async/async.tmpl.h | 767 ---------------------------------------------
 1 file changed, 767 deletions(-)
 delete mode 100644 modules/async/async.tmpl.h

(limited to 'modules/async/async.tmpl.h')

diff --git a/modules/async/async.tmpl.h b/modules/async/async.tmpl.h
deleted file mode 100644
index 8fcb59c..0000000
--- a/modules/async/async.tmpl.h
+++ /dev/null
@@ -1,767 +0,0 @@
-#pragma once
-
-#include <forstio/common.h>
-#include <forstio/error.h>
-
-#include <cassert>
-// Template inlining
-
-namespace saw {
-
-template <typename Func> conveyor_result<Func, void> execLater(Func &&func) {
-	conveyor<void> conveyor{fix_void<void>{}};
-	return conveyor.then(std::move(func));
-}
-
-template <typename T>
-conveyor<T>::conveyor(fix_void<T> value) : conveyor_base(nullptr) {
-	// Is there any way to do  this?
-	// @todo new conveyor_base constructor for Immediate values
-
-	own<immediate_conveyor_node<fix_void<T>>> immediate =
-		heap<immediate_conveyor_node<fix_void<T>>>(std::move(value));
-
-	if (!immediate) {
-		return;
-	}
-
-	node_ = std::move(immediate);
-}
-
-template <typename T>
-conveyor<T>::conveyor(error &&err) : conveyor_base(nullptr) {
-	own<immediate_conveyor_node<fix_void<T>>> immediate =
-		heap<immediate_conveyor_node<fix_void<T>>>(std::move(err));
-
-	if (!immediate) {
-		return;
-	}
-
-	node_ = std::move(immediate);
-}
-
-template <typename T>
-conveyor<T>::conveyor(own<conveyor_node> node_p)
-	: conveyor_base{std::move(node_p)} {}
-
-template <typename T>
-template <typename Func, typename ErrorFunc>
-conveyor_result<Func, T> conveyor<T>::then(Func &&func,
-										   ErrorFunc &&error_func) {
-	own<conveyor_node> conversion_node =
-		heap<convert_conveyor_node<fix_void<return_type<Func, T>>, fix_void<T>,
-								   Func, ErrorFunc>>(
-			std::move(node_), std::move(func), std::move(error_func));
-
-	return conveyor<remove_error_or<return_type<Func, T>>>::to_conveyor(
-		std::move(conversion_node));
-}
-
-template <typename T> conveyor<T> conveyor<T>::buffer(size_t size) {
-	SAW_ASSERT(node_) { return conveyor<T>{own<conveyor_node>{nullptr}}; }
-	conveyor_storage *storage = node_->next_storage();
-	SAW_ASSERT(storage) { return conveyor<T>{own<conveyor_node>{nullptr}}; }
-
-	own<queue_buffer_conveyor_node<fix_void<T>>> storage_node =
-		heap<queue_buffer_conveyor_node<fix_void<T>>>(std::move(node_), size);
-
-	conveyor_storage *storage_ptr =
-		static_cast<conveyor_storage *>(storage_node.get());
-
-	storage->set_parent(storage_ptr);
-	return conveyor<T>{std::move(storage_node)};
-}
-
-template <typename T>
-template <typename... Args>
-conveyor<T> conveyor<T>::attach(Args &&...args) {
-	own<attach_conveyor_node<Args...>> attach_node =
-		heap<attach_conveyor_node<Args...>>(std::move(node_),
-											std::move(args...));
-	return conveyor<T>{std::move(attach_node)};
-}
-
-template <typename T>
-std::pair<conveyor<T>, merge_conveyor<T>> conveyor<T>::merge() {
-	our<merge_conveyor_node_data<T>> data =
-		share<merge_conveyor_node_data<T>>();
-
-	own<merge_conveyor_node<T>> merge_node = heap<merge_conveyor_node<T>>(data);
-
-	SAW_ASSERT(node_) {
-		return std::make_pair(conveyor<T>{own<conveyor_node>{nullptr}},
-							  merge_conveyor<T>{});
-	}
-	conveyor_storage *storage = node_->next_storage();
-	SAW_ASSERT(storage) {
-		return std::make_pair(conveyor<T>{own<conveyor_node>{nullptr}},
-							  merge_conveyor<T>{});
-	}
-
-	data->attach(conveyor<T>::to_conveyor(std::move(node_)));
-
-	merge_conveyor<T> node_ref{data};
-
-	return std::make_pair(conveyor<T>{std::move(merge_node)},
-						  std::move(node_ref));
-}
-
-template <>
-template <typename ErrorFunc>
-conveyor_sink conveyor<void>::sink(ErrorFunc &&error_func) {
-	conveyor_storage *storage = node_->next_storage();
-	SAW_ASSERT(storage) { return conveyor_sink{}; }
-
-	own<sink_conveyor_node> sink_node =
-		heap<sink_conveyor_node>(std::move(node_));
-	conveyor_storage *storage_ptr =
-		static_cast<conveyor_storage *>(sink_node.get());
-
-	storage->set_parent(storage_ptr);
-
-	return conveyor_sink{std::move(sink_node)};
-}
-
-void detach_conveyor(conveyor<void> &&conveyor);
-
-template <typename T>
-template <typename ErrorFunc>
-void conveyor<T>::detach(ErrorFunc &&func) {
-	detach_conveyor(std::move(then([](T &&) {}, std::move(func))));
-}
-
-template <>
-template <typename ErrorFunc>
-void conveyor<void>::detach(ErrorFunc &&func) {
-	detach_conveyor(std::move(then([]() {}, std::move(func))));
-}
-
-template <typename T>
-conveyor<T> conveyor<T>::to_conveyor(own<conveyor_node> node) {
-	return conveyor<T>{std::move(node)};
-}
-
-template <typename T>
-own<conveyor_node> conveyor<T>::from_conveyor(conveyor<T> conveyor) {
-	return std::move(conveyor.node_);
-}
-
-template <typename T> error_or<fix_void<T>> conveyor<T>::take() {
-	SAW_ASSERT(node_) {
-		return error_or<fix_void<T>>{
-			make_error<err::invalid_state>("conveyor in invalid state")};
-	}
-	conveyor_storage *storage = node_->next_storage();
-	if (storage) {
-		if (storage->queued() > 0) {
-			error_or<fix_void<T>> result;
-			node_->get_result(result);
-			return result;
-		} else {
-			return error_or<fix_void<T>>{
-				make_error<err::buffer_exhausted>("conveyor buffer has no elements")};
-		}
-	} else {
-		return error_or<fix_void<T>>{
-			make_error<err::invalid_state>("conveyor node has no child storage")};
-	}
-}
-
-template <typename T> conveyor_and_feeder<T> new_conveyor_and_feeder() {
-	own<adapt_conveyor_feeder<fix_void<T>>> feeder =
-		heap<adapt_conveyor_feeder<fix_void<T>>>();
-	own<adapt_conveyor_node<fix_void<T>>> node =
-		heap<adapt_conveyor_node<fix_void<T>>>();
-
-	feeder->set_feedee(node.get());
-	node->set_feeder(feeder.get());
-
-	return conveyor_and_feeder<T>{std::move(feeder),
-								  conveyor<T>::to_conveyor(std::move(node))};
-}
-
-// QueueBuffer
-template <typename T> void queue_buffer_conveyor_node<T>::fire() {
-	if (child_mixin_.child) {
-		if (!storage_.empty()) {
-			if (storage_.front().is_error()) {
-				if (storage_.front().get_error().is_critical()) {
-					child_mixin_.child = nullptr;
-				}
-			}
-		}
-	}
-
-	bool has_space_before_fire = space() > 0;
-
-	if (parent_) {
-		parent_->child_has_fired();
-		if (!storage_.empty() && parent_->space() > 0) {
-			arm_later();
-		}
-	}
-
-	if (!child_mixin_.child) {
-		while (!storage_.empty()) {
-			storage_.pop();
-		}
-		return;
-	}
-
-	conveyor_storage *ch_storage = child_mixin_.child->next_storage();
-	if (ch_storage && !has_space_before_fire) {
-		ch_storage->parent_has_fired();
-	}
-}
-
-template <typename T>
-void queue_buffer_conveyor_node<T>::get_result(error_or_value &eov) noexcept {
-	error_or<T> &err_or_val = eov.as<T>();
-	err_or_val = std::move(storage_.front());
-	storage_.pop();
-}
-
-template <typename T> size_t queue_buffer_conveyor_node<T>::space() const {
-	return max_store_ - storage_.size();
-}
-
-template <typename T> size_t queue_buffer_conveyor_node<T>::queued() const {
-	return storage_.size();
-}
-
-template <typename T> void queue_buffer_conveyor_node<T>::child_has_fired() {
-	if (child_mixin_.child && storage_.size() < max_store_) {
-		error_or<T> eov;
-		child_mixin_.child->get_result(eov);
-
-		if (eov.is_error()) {
-			if (eov.get_error().is_critical()) {
-			}
-		}
-
-		storage_.push(std::move(eov));
-		if (!is_armed()) {
-			arm_later();
-		}
-	}
-}
-
-template <typename T> void queue_buffer_conveyor_node<T>::parent_has_fired() {
-	SAW_ASSERT(parent_) { return; }
-
-	if (parent_->space() == 0) {
-		return;
-	}
-
-	if (queued() > 0) {
-		arm_later();
-	}
-}
-
-template <typename T>
-immediate_conveyor_node<T>::immediate_conveyor_node(fix_void<T> &&val)
-	: value_{std::move(val)}, retrieved_{0} {}
-
-template <typename T>
-immediate_conveyor_node<T>::immediate_conveyor_node(error &&error)
-	: value_{std::move(error)}, retrieved_{0} {}
-
-template <typename T> size_t immediate_conveyor_node<T>::space() const {
-	return 0;
-}
-
-template <typename T> size_t immediate_conveyor_node<T>::queued() const {
-	return retrieved_ > 1 ? 0 : 1;
-}
-
-template <typename T> void immediate_conveyor_node<T>::child_has_fired() {
-	// Impossible case
-	assert(false);
-}
-
-template <typename T> void immediate_conveyor_node<T>::parent_has_fired() {
-	SAW_ASSERT(parent_) { return; }
-	assert(parent_->space() > 0);
-
-	if (queued() > 0) {
-		arm_next();
-	}
-}
-
-template <typename T> void immediate_conveyor_node<T>::fire() {
-
-	if (parent_) {
-		parent_->child_has_fired();
-		if (queued() > 0 && parent_->space() > 0) {
-			arm_last();
-		}
-	}
-}
-
-template <typename T>
-merge_conveyor<T>::merge_conveyor(lent<merge_conveyor_node_data<T>> d)
-	: data_{std::move(d)} {}
-
-template <typename T> merge_conveyor<T>::~merge_conveyor() {}
-
-template <typename T> void merge_conveyor<T>::attach(conveyor<T> conveyor) {
-	auto sp = data_.lock();
-	SAW_ASSERT(sp) { return; }
-
-	sp->attach(std::move(conveyor));
-}
-
-template <typename T>
-merge_conveyor_node<T>::merge_conveyor_node(our<merge_conveyor_node_data<T>> d)
-	: data_{d} {
-	SAW_ASSERT(data_) { return; }
-
-	data_->merger = this;
-}
-
-template <typename T> merge_conveyor_node<T>::~merge_conveyor_node() {}
-
-template <typename T>
-error_or<own<conveyor_node>>
-merge_conveyor_node<T>::swap_child(own<conveyor_node> &&swapee_) noexcept {
-	(void)swapee_;
-	return make_error<err::invalid_state>(
-		"merge_conveyor_node<T>::appendage should block calls to this class");
-}
-
-template <typename T>
-void merge_conveyor_node<T>::get_result(error_or_value &eov) noexcept {
-	error_or<fix_void<T>> &err_or_val = eov.as<fix_void<T>>();
-
-	SAW_ASSERT(data_) { return; }
-
-	/// @todo search appendages for result
-
-	auto &appendages = data_->appendages;
-	next_appendage_ = std::min(appendages.size(), next_appendage_);
-
-	for (size_t i = next_appendage_; i < appendages.size(); ++i) {
-		if (appendages[i]->queued() > 0) {
-			err_or_val = std::move(appendages[i]->error_or_value_.value());
-			appendages[i]->error_or_value_ = std::nullopt;
-			next_appendage_ = i + 1;
-			return;
-		}
-	}
-	for (size_t i = 0; i < next_appendage_; ++i) {
-		if (appendages[i]->queued() > 0) {
-			err_or_val = std::move(appendages[i]->error_or_value_.value());
-			appendages[i]->error_or_value_ = std::nullopt;
-			next_appendage_ = i + 1;
-			return;
-		}
-	}
-
-	err_or_val = make_error<err::invalid_state>("No value in Merge appendages");
-}
-
-template <typename T> void merge_conveyor_node<T>::fire() {
-	SAW_ASSERT(queued() > 0) { return; }
-
-	if (parent_) {
-		parent_->child_has_fired();
-
-		if (queued() > 0 && parent_->space() > 0) {
-			arm_later();
-		}
-	}
-}
-
-template <typename T> size_t merge_conveyor_node<T>::space() const { return 0; }
-
-template <typename T> size_t merge_conveyor_node<T>::queued() const {
-	SAW_ASSERT(data_) { return 0; }
-
-	size_t queue_count = 0;
-
-	for (auto &iter : data_->appendages) {
-		queue_count += iter->queued();
-	}
-
-	return queue_count;
-}
-
-template <typename T> void merge_conveyor_node<T>::child_has_fired() {
-	/// This can never happen
-	assert(false);
-}
-
-template <typename T> void merge_conveyor_node<T>::parent_has_fired() {
-	SAW_ASSERT(parent_) { return; }
-	if (queued() > 0) {
-		if (parent_->space() > 0) {
-			arm_later();
-		}
-	}
-}
-
-/**
- * merge_conveyor_node<T>::Apendage
- */
-
-template <typename T>
-error_or<own<conveyor_node>>
-merge_conveyor_node<T>::appendage::swap_child(own<conveyor_node> &&swapee_) {
-	own<conveyor_node> old_child = std::move(child);
-
-	child = std::move(swapee_);
-
-	// This case should never happen
-	SAW_ASSERT(old_child) { return make_error<err::invalid_state>("No child exists"); }
-
-	return old_child;
-}
-
-template <typename T>
-void merge_conveyor_node<T>::appendage::get_result(error_or_value &eov) {
-	error_or<fix_void<T>> &err_or_val = eov.as<fix_void<T>>();
-
-	SAW_ASSERT(queued() > 0) {
-		err_or_val =
-			make_error<err::invalid_state>("No element queued in Merge appendage Node");
-		return;
-	}
-
-	err_or_val = std::move(error_or_value_.value());
-	error_or_value_ = std::nullopt;
-}
-
-template <typename T> size_t merge_conveyor_node<T>::appendage::space() const {
-	SAW_ASSERT(merger) { return 0; }
-
-	if (error_or_value_.has_value()) {
-		return 0;
-	}
-
-	return 1;
-}
-
-template <typename T> size_t merge_conveyor_node<T>::appendage::queued() const {
-	SAW_ASSERT(merger) { return 0; }
-
-	if (error_or_value_.has_value()) {
-		return 1;
-	}
-
-	return 0;
-}
-
-/// @todo delete this function. Replaced by the regular get_result
-template <typename T>
-void merge_conveyor_node<T>::appendage::get_appendage_result(
-	error_or_value &eov) {
-	error_or<fix_void<T>> &err_or_val = eov.as<fix_void<T>>();
-
-	SAW_ASSERT(queued() > 0) {
-		err_or_val =
-			make_error<err::invalid_state>("No element queued in Merge appendage Node");
-		return;
-	}
-
-	err_or_val = std::move(error_or_value_.value());
-	error_or_value_ = std::nullopt;
-}
-
-template <typename T>
-void merge_conveyor_node<T>::appendage::child_has_fired() {
-	SAW_ASSERT(!error_or_value_.has_value()) { return; }
-	error_or<fix_void<T>> eov;
-	child->get_result(eov);
-
-	error_or_value_ = std::move(eov);
-
-	if (!merger->is_armed()) {
-		merger->arm_later();
-	}
-}
-
-template <typename T>
-void merge_conveyor_node<T>::appendage::parent_has_fired() {
-	conveyor_storage *child_storage = child->next_storage();
-	if (child_storage) {
-		child_storage->parent_has_fired();
-	}
-}
-
-template <typename T>
-void merge_conveyor_node<T>::appendage::set_parent(conveyor_storage *par) {
-	SAW_ASSERT(merger) { return; }
-
-	SAW_ASSERT(child) { return; }
-
-	parent_ = par;
-}
-
-template <typename T>
-void merge_conveyor_node_data<T>::attach(conveyor<T> conv) {
-	auto nas = conveyor<T>::from_conveyor(std::move(conv));
-	SAW_ASSERT(nas) { return; }
-	conveyor_storage *storage = nas->next_storage();
-	SAW_ASSERT(storage) { return; }
-
-	auto merge_node_appendage =
-		heap<typename merge_conveyor_node<T>::appendage>(std::move(nas),
-														 *merger);
-	auto merge_node_appendage_ptr = merge_node_appendage.get();
-
-	storage->set_parent(merge_node_appendage.get());
-
-	SAW_ASSERT(merger) { return; }
-
-	conveyor_storage *mrg_storage = merger->next_storage();
-	SAW_ASSERT(mrg_storage) { return; }
-
-	merge_node_appendage->set_parent(mrg_storage);
-
-	appendages.push_back(std::move(merge_node_appendage));
-
-	/// @todo return this. necessary? maybe for the weird linking setup
-	/// maybe not
-	// return merge_node_appendage_ptr;
-}
-
-template <typename T>
-void merge_conveyor_node_data<T>::governing_node_destroyed() {
-	appendages.clear();
-	merger = nullptr;
-}
-
-template <typename T> adapt_conveyor_feeder<T>::~adapt_conveyor_feeder() {
-	if (feedee_) {
-		feedee_->set_feeder(nullptr);
-		feedee_ = nullptr;
-	}
-}
-
-template <typename T>
-void adapt_conveyor_feeder<T>::set_feedee(adapt_conveyor_node<T> *feedee_p) {
-	feedee_ = feedee_p;
-}
-
-template <typename T> void adapt_conveyor_feeder<T>::feed(T &&value) {
-	if (feedee_) {
-		feedee_->feed(std::move(value));
-	}
-}
-
-template <typename T> void adapt_conveyor_feeder<T>::fail(error &&error) {
-	if (feedee_) {
-		feedee_->fail(std::move(error));
-	}
-}
-
-template <typename T> size_t adapt_conveyor_feeder<T>::queued() const {
-	if (feedee_) {
-		return feedee_->queued();
-	}
-	return 0;
-}
-
-template <typename T> size_t adapt_conveyor_feeder<T>::space() const {
-	if (feedee_) {
-		return feedee_->space();
-	}
-	return 0;
-}
-
-template <typename T>
-error adapt_conveyor_feeder<T>::swap(conveyor<T> &&conv) noexcept {
-	SAW_ASSERT(feedee_) { return make_error<err::invalid_state>("No feedee connected"); }
-
-	auto node = conveyor<T>::from_conveyor(std::move(conv));
-
-	feedee_->swap_child(std::move(node));
-
-	return no_error();
-}
-
-template <typename T>
-adapt_conveyor_node<T>::adapt_conveyor_node() : conveyor_event_storage{} {}
-
-template <typename T> adapt_conveyor_node<T>::~adapt_conveyor_node() {
-	if (feeder_) {
-		feeder_->set_feedee(nullptr);
-		feeder_ = nullptr;
-	}
-}
-
-template <typename T>
-error_or<own<conveyor_node>>
-adapt_conveyor_node<T>::swap_child(own<conveyor_node> &&swapee) noexcept {
-	// This should return the owning pointer of this instance
-	auto myself_err = parent_node_.swap_child_of_parent(std::move(swapee));
-
-	if (myself_err.is_error()) {
-		return myself_err;
-	}
-
-	auto &myself = myself_err.get_value();
-
-	assert(myself.get() == this);
-
-	return myself_err;
-}
-
-template <typename T>
-conveyor_storage *adapt_conveyor_node<T>::next_storage() noexcept {
-	return static_cast<conveyor_storage *>(this);
-}
-
-template <typename T>
-void adapt_conveyor_node<T>::notify_parent_attached(
-	conveyor_node &par) noexcept {
-	parent_node_.change_parent(&par);
-}
-
-template <typename T>
-void adapt_conveyor_node<T>::set_feeder(adapt_conveyor_feeder<T> *feeder_p) {
-	feeder_ = feeder_p;
-}
-
-template <typename T> void adapt_conveyor_node<T>::feed(T &&value) {
-	storage_.push(std::move(value));
-	arm_next();
-}
-
-template <typename T> void adapt_conveyor_node<T>::fail(error &&error) {
-	storage_.push(std::move(error));
-	arm_next();
-}
-
-template <typename T> size_t adapt_conveyor_node<T>::queued() const {
-	return storage_.size();
-}
-
-template <typename T> size_t adapt_conveyor_node<T>::space() const {
-	return std::numeric_limits<size_t>::max() - storage_.size();
-}
-
-template <typename T>
-void adapt_conveyor_node<T>::get_result(error_or_value &err_or_val) {
-	if (!storage_.empty()) {
-		err_or_val.as<T>() = std::move(storage_.front());
-		storage_.pop();
-	} else {
-		err_or_val.as<T>() = make_error<err::invalid_state>(
-			"Signal for retrieval of storage sent even though no "
-			"data is present");
-	}
-}
-
-template <typename T> void adapt_conveyor_node<T>::child_has_fired() {
-	// Adapt node has no children
-	assert(false);
-}
-
-template <typename T> void adapt_conveyor_node<T>::parent_has_fired() {
-	SAW_ASSERT(parent_) { return; }
-
-	if (parent_->space() == 0) {
-		return;
-	}
-}
-
-template <typename T> void adapt_conveyor_node<T>::fire() {
-	if (parent_) {
-		parent_->child_has_fired();
-
-		if (storage_.size() > 0) {
-			arm_later();
-		}
-	}
-}
-
-template <typename T> one_time_conveyor_feeder<T>::~one_time_conveyor_feeder() {
-	if (feedee_) {
-		feedee_->set_feeder(nullptr);
-		feedee_ = nullptr;
-	}
-}
-
-template <typename T>
-void one_time_conveyor_feeder<T>::set_feedee(
-	one_time_conveyor_node<T> *feedee_p) {
-	feedee_ = feedee_p;
-}
-
-template <typename T> void one_time_conveyor_feeder<T>::feed(T &&value) {
-	if (feedee_) {
-		feedee_->feed(std::move(value));
-	}
-}
-
-template <typename T> void one_time_conveyor_feeder<T>::fail(error &&error) {
-	if (feedee_) {
-		feedee_->fail(std::move(error));
-	}
-}
-
-template <typename T> size_t one_time_conveyor_feeder<T>::queued() const {
-	if (feedee_) {
-		return feedee_->queued();
-	}
-	return 0;
-}
-
-template <typename T> size_t one_time_conveyor_feeder<T>::space() const {
-	if (feedee_) {
-		return feedee_->space();
-	}
-	return 0;
-}
-
-template <typename T> one_time_conveyor_node<T>::~one_time_conveyor_node() {
-	if (feeder_) {
-		feeder_->set_feedee(nullptr);
-		feeder_ = nullptr;
-	}
-}
-
-template <typename T>
-void one_time_conveyor_node<T>::set_feeder(
-	one_time_conveyor_feeder<T> *feeder_p) {
-	feeder_ = feeder_p;
-}
-
-template <typename T> void one_time_conveyor_node<T>::feed(T &&value) {
-	storage_ = std::move(value);
-	arm_next();
-}
-
-template <typename T> void one_time_conveyor_node<T>::fail(error &&error) {
-	storage_ = std::move(error);
-	arm_next();
-}
-
-template <typename T> size_t one_time_conveyor_node<T>::queued() const {
-	return storage_.has_value() ? 1 : 0;
-}
-
-template <typename T> size_t one_time_conveyor_node<T>::space() const {
-	return passed_ ? 0 : 1;
-}
-
-template <typename T>
-void one_time_conveyor_node<T>::get_result(error_or_value &err_or_val) {
-	if (storage_.has_value()) {
-		err_or_val.as<T>() = std::move(storage_.value());
-		storage_ = std::nullopt;
-	} else {
-		err_or_val.as<T>() = make_error<err::invalid_state>(
-			"Signal for retrieval of storage sent even though no "
-			"data is present");
-	}
-}
-
-template <typename T> void one_time_conveyor_node<T>::fire() {
-	if (parent_) {
-		parent_->child_has_fired();
-	}
-}
-
-} // namespace saw
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