flatten_proxy.h File Reference

Tuple flattening utilities and proxy wrapper for nested tuple-like types. More...

#include "jh/conceptual/tuple_like.h"
#include <tuple>
#include <utility>
#include <type_traits>

Go to the source code of this file.

Classes
struct	jh::meta::flatten_proxy< Tuple >
	Proxy wrapper that lazily exposes flattened tuple access. More...
struct	std::tuple_size< jh::meta::flatten_proxy< Tuple > >
struct	std::tuple_element< I, jh::meta::flatten_proxy< Tuple > >

Namespaces
namespace	jh::meta
	Aggregated entry point for compile-time metaprogramming utilities.

Functions
template<typename Tuple>
constexpr auto	jh::meta::tuple_materialize (const Tuple &t)
	Flattens a tuple-like object into a fully materialized std::tuple.
template<std::size_t I, typename Tuple>
constexpr decltype(auto)	jh::meta::get (const flatten_proxy< Tuple > &p) noexcept

Detailed Description

Tuple flattening utilities and proxy wrapper for nested tuple-like types.

Copyright

Copyright 2025 JeongHan-Bae <mastropseudo@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Full license: GitHub

Author

JeongHan-Bae <mastropseudo@gmail.com>

The jh::meta::flatten_proxy mechanism provides a compile-time meta-layer for expanding and materializing arbitrarily nested tuple_like structures into a single flattened std::tuple.

Design Goals

• Provide a zero-overhead flattening proxy for tuple-like objects.
• Support composition of nested proxy or view types that model tuple_like.
• Expose a clean tuple_materialize() API for generic metaprogramming.

Key Components

• jh::meta::tuple_materialize — Flattens any tuple-like object.
• jh::meta::flatten_proxy — Lazy wrapper exposing flattened get interface.

Design Notes

• Compatible with proxy-based tuple types such as zip_reference_proxy.
• All transformations are constexpr and reference-safe.
• Integrates with std::tuple_size / std::tuple_element for structured binding compatibility.

Version

1.3.x

Date

2025