buffyanamin’s gists

buffyanamin / chrono_helper.cpp

Last active December 29, 2021 08:49

chrono helper(boost & std chrono inter-convertion)

	#include <boost/chrono.hpp>
	#include <chrono>

	// from https://github.com/boostorg/chrono/issues/41#issuecomment-538932927
	namespace sc = ::std::chrono;
	namespace bc = ::boost::chrono;
	namespace chrono_helper {

	// std::is_same_v<to_std_ratio_t<boost::ratio<N,D>>, std::ratio<N,D>>
	// if and only if N, D are coprime and D is positive

buffyanamin / get_nth_variadic_elem.cpp

Created January 5, 2022 09:02

Get nth element from c++ variadic template argument

	template <int I, class... Ts>
	decltype(auto) get(Ts&&... ts) {
	return std::get<I>(std::forward_as_tuple(ts...));
	}

buffyanamin / get_nth_variadic_elem_no_tuple.cpp

Last active February 18, 2022 10:03

c++ template get nth element type from variadic arguments

	template <std::size_t N, typename T, typename... types>
	struct GetNthArgType {
	using type = typename GetNthArgType<N - 1, types...>::type;
	};

	template <typename T, typename... types>
	struct GetNthArgType<0, T, types...> {
	using type = T;
	};

buffyanamin / type_after_variadic.cpp

Created February 23, 2022 06:16

c++ template specify type after variadic types

	// from https://www.cppstories.com/2020/09/variadic-pack-first.html/
	namespace detail
	{
	template<typename Output, typename... Inputs>
	void tempFunc(Output& output, Inputs const&... inputs)
	{
	// implementation of f
	}

	template<typename... InputsThenOutput, size_t... InputIndexes>

buffyanamin / lambda_to_function_without_specify_type.cpp

Last active May 17, 2022 07:12

	namespace detail {
	template <typename Res, typename... Args>
	Obj<Res, Args...> NewObj(std::function<Res(Args...)>&& func) {
	return std::make_shared<Obj<Res(Args...)>>(std::forward<std::function<Res(Args...)>&&>(func));
	}
	}

	namespace detail {
	template <typename F>
	struct function_traits : public function_traits<decltype(&std::decay<F>::type::operator())> {};

buffyanamin / asan_symbolize.py

Last active June 10, 2022 02:27

asan_symbolize with dsym producer

	# https://github.com/llvm/llvm-project/blob/main/compiler-rt/lib/asan/scripts/asan_symbolize.py
	def dsym_producer(binary_path):
	base='/path/to/dSYM/dir/'
	filename = os.path.basename(binary_path)
	if (binary_path.endswith('.dylib')):
	sym = base + filename + '.dSYM'
	else:
	sym = base + filename + ".app.dSYM"
	print(binary_path + ' -> ' + sym)
	return [sym]