core_zero/Examples.cpp

// License: Modified MIT (NON-AI)
// See the LICENSE file in the root directory for license information.
// Copyright 2025 Timothy Prepscius

#include <tjp/core/log/Log.h>
#include <tjp/core/containers/Vector.hpp>
#include <tjp/core/containers/Map.hpp>
#include <tjp/core/algorithm/map_value.hpp>
#include <tjp/core/algorithm/map_value_erase.hpp>
#include <tjp/core/iterators/range.hpp>
#include <tjp/core/threads/Lock.hpp>
#include <tjp/core/time/Time+chrono.hpp>

namespace my_base_namespace {
	namespace ext = tjp::core;
	using namespace ext;
}

// or

namespace my_base_namespace {
	namespace ext = tjp::core;

	using ext::Mutex;
}

namespace my_base_namespace::sub_name_space {

void do_something() {}

template<typename T>
void do_something_with(T &&) {}

// ----------------------------------------
// example for locks
// ----------------------------------------
void example_lock_tjp()
{
	Mutex mutex;
	
	auto lock = lock_of(mutex);
	do_something();
	
	auto should_send_signal = true;
	if (should_send_signal)
	{
		auto unlock = unlock_of(mutex);
		do_something();
	}
}

// using std
void example_lock_cpp()
{
	std::mutex mutex;
	std::lock_guard<std::mutex> lock(mutex);
	do_something();

	auto should_send_signal = true;
	if (should_send_signal)
	{
		try
		{
			mutex.unlock();
			do_something();
			mutex.lock();
		}
		catch (...)
		{
			mutex.lock();
		}
	}
}




// ----------------------------------------
// example for maps
// ----------------------------------------
void example_map_tjp()
{
	Map<int, int> map;
	if (auto value = map_value(map, 42))
		do_something_with(*value);

	if (auto value = map_value_erase(map, 42))
		do_something_with(*value);
}


// using std
void example_map_cpp()
{
	std::map<int, int> map;
	auto i = map.find(42);
	if (i != map.end())
	{
		do_something_with(*i);
	}
	
	auto j = map.find(42);
	if (j != map.end())
	{
		auto v = std::move(j->second);
		map.erase(j);
		
		do_something_with(v);
	}
}





// ----------------------------------------
// example for range
// ----------------------------------------

void example_range_cpp()
{
	for (auto k=0; k<42; ++k)
		do_something_with(k);
}

void example_range_tjp()
{
	for (auto i: range(42))
		do_something_with(i);
}

// ----------------------------------------
// time
// ----------------------------------------

void example_time_duration_cpp()
{
	auto t1 = std::chrono::system_clock::now();
	do_something();
	auto t2 = std::chrono::system_clock::now();

	auto duration = t2 - t1;
	auto duration_serializable_number = std::chrono::duration_cast<std::chrono::microseconds>(duration).count();
	do_something_with(duration_serializable_number);
	
	auto duration_in_seconds = std::chrono::duration_cast<std::chrono::seconds>(duration);
	do_something_with(duration_in_seconds);

	auto two_second_after_t1 = t1 + std::chrono::seconds(2);
	do_something_with(two_second_after_t1);
	
	auto meters = 32.;
	auto seconds = std::chrono::seconds(2);
	auto meters_per_second = meters / std::chrono::duration<float>(seconds).count();
	do_something_with(meters_per_second);
	
	meters = std::chrono::duration<float>(seconds).count() * meters_per_second;
	do_something_with(meters);
}

void example_time_duration_tjp()
{
	auto t1 = time::now();
	do_something();
	auto t2 = time::now();

	auto duration = t2 - t1;
	auto duration_serializable_number = duration.v;
	do_something_with(duration_serializable_number);

	auto duration_in_seconds = duration / time::Seconds;
	do_something_with(duration_in_seconds);

	auto two_second_after_t1 = t1 + time::Seconds(2);
	auto two_second_after_t1_another = t1 + 2 * time::Seconds;
	do_something_with(two_second_after_t1);
	do_something_with(two_second_after_t1_another);
	
	auto meters = 32.;
	auto seconds = 2 * time::Seconds;
	auto meters_per_second = meters / seconds;
	do_something_with(meters_per_second);
	
	meters = seconds * meters_per_second;
	do_something_with(meters);
}

} // namespace