https://github.com/jfalcou/spy

SPY - C++ Information Broker
https://github.com/jfalcou/spy

concepts constexpr cpp17 cpp20 predef

Last synced: 9 months ago
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SPY - C++ Information Broker

• Host: GitHub
• URL: https://github.com/jfalcou/spy
• Owner: jfalcou
• License: bsl-1.0
• Created: 2018-05-03T19:27:00.000Z (almost 8 years ago)
• Default Branch: main
• Last Pushed: 2025-07-01T16:27:29.000Z (9 months ago)
• Last Synced: 2025-07-01T17:38:16.217Z (9 months ago)
• Topics: concepts, constexpr, cpp17, cpp20, predef
• Language: C++
• Homepage: https://jfalcou.github.io/spy/
• Size: 736 KB
• Stars: 154
• Watchers: 12
• Forks: 11
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

Awesome Lists containing this project

• awesome-cpp - spy - A C++17 constexpr library for detecting OS, compiler, architecture, and SIMD at compile time. [MIT] (Miscellaneous)
• fucking-awesome-cpp - spy - A C++17 constexpr library for detecting OS, compiler, architecture, and SIMD at compile time. [MIT] (Miscellaneous)
• awesome-cpp-with-stars - spy - 02-25 | (Miscellaneous)

README

          


# C++ Informations Broker

[![CircleCI](https://circleci.com/gh/jfalcou/spy.svg?style=svg&circle-token=91ebbf06adfe257ebdff3a5ed17ea512fe02771c)](https://circleci.com/gh/jfalcou/spy) [![Build status](https://ci.appveyor.com/api/projects/status/3us8906c0lvdl8ld/branch/main?svg=true)](https://ci.appveyor.com/project/jfalcou/spy/branch/main)

[![Licence](https://img.shields.io/github/license/jfalcou/spy?style=plastic)](https://img.shields.io/github/license/jfalcou/spy?style=plastic)

[![Discord](https://img.shields.io/discord/692734675726237696?style=plastic)](https://discord.gg/a9qVaEMeXd8)

# Purpose

Detection and versioning of operating systems, compilers, architecture and other element are

traditionally done using preprocessor macros. Library like

[Boost.Predef](https://www.boost.org/doc/libs/release/doc/html/predef.html) provides a sanitized

interface on top of those but still live in a world where the preprocessor is king.

SPY is a C++17 (and onward) library that gathers similar informations and provides a `constexpr`

compatible interface to access those information, thus making their exploitation within `constexpr`

context possible.

The complete [documentation can be found here](https://jfalcou.github.io/spy).

# Useful Links

- [Our CppCon 2019 Ligthning talk slides](https://docs.google.com/presentation/d/1nSBhU4pr5EWznni0MYsyDkMCr3O3q2XS-KQdz2_BRRI/edit?usp=sharing)

- [Our CppCon 2019 Ligthning talk video](https://www.youtube.com/watch?v=t406o2EhG-A)

- [Boost.Predef](https://www.boost.org/doc/libs/release/doc/html/predef.html)