# tuple

**Repository Path**: mirrors_taocpp/tuple

## Basic Information

- **Project Name**: tuple
- **Description**: Compile-time-efficient proof-of-concept implementation for std::tuple
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-26
- **Last Updated**: 2026-05-24

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# The Art of C++ / Tuple

[![Release](https://img.shields.io/github/release/taocpp/tuple.svg)](https://github.com/taocpp/tuple/releases/latest)
[![Conan Center](https://img.shields.io/conan/v/taocpp-tuple)](https://conan.io/center/recipes/taocpp-tuple)

[The Art of C++](https://taocpp.github.io/) / Tuple is a C++11 header-only proof-of-concept implementation of
[`std::tuple`](http://en.cppreference.com/w/cpp/utility/tuple).

## Rationale

Why another implementation of `std::tuple`? To provide a proof-of-concept that,
when avoiding recursion, code can benefit in significant ways. I prepared a talk
about it, including some benchmarks.

[Download presentation](https://github.com/taocpp/tuple/blob/main/doc/variadic_templates.pdf)

TL;DR: GCC 5 on Linux with libstdc++'s `std::tuple` requires 19.6s and an instantiation
depth of at least 3.719 to compile an
[example](https://github.com/taocpp/tuple/blob/main/src/test/tuple/tuple_benchmark.cpp)
generating a tuple with 265 elements via `std::tuple_cat`.
`tao::tuple` requires 1.2s and an instantiation depth of 26 on the same system.

Apple LLVM 7.0 (~Clang 3.7) with libc++'s `std::tuple` requires 70s and an instantiation
depth of 514 to compile the example. `tao::tuple` requires 1.7s and an instantiation depth
of 15 on the same system. This case does *not* change `std::integer_sequence` or
`std::make_integer_sequence`, all improvements are coming from all the *other* improvements
from avoiding recursion.

## CUDA

`tao::tuple` supports [CUDA](http://www.nvidia.com/object/cuda_home.html).

## Compatibility

* Requires C++11 or newer.
* Tested with GCC 4.8+, Clang 3.4+, and Visual Studio 2017.

## Package Managers

You can download and install [The Art of C++](https://taocpp.github.io/) / Tuple using the [Conan](https://github.com/conan-io/conan) package manager:

    conan install -r conancenter --requires="taocpp-tuple/1.0.0"

The taocpp-tuple package in conan is kept up to date by Conan team members and community contributors.
If the version is out-of-date, please [create an issue or pull request](https://github.com/conan-io/conan-center-index) on the Conan Center Index repository.

## Changelog

### 1.0.0

Released 2018-08-01

* Initial release.

## License

The Art of C++ is certified [Open Source](http://www.opensource.org/docs/definition.html) software. It may be used for any purpose, including commercial purposes, at absolutely no cost. It is distributed under the terms of the [MIT license](http://www.opensource.org/licenses/mit-license.html) reproduced here.

See the [LICENSE](LICENSE) file for details.