C++ Shelf

---

Collection of - Single-Header, header-only, C++ libraries files.
Personal incubator for various library ideas and experiences, and perhaps a hint of serendipity.

The libraries here could, once mature enough, become self-contained in a separated repository.

---

Components - nested librairies

📦 ag

A tuple-like interface for aggregates type.

Project's documentation, dashboard

🌊 wf

Generic eDSL builder - as a route pattern - to best translate workflow/use-cases in C++

See project's documentation, dashboard

🧙‍♂️ mp

A collection of C++ TMP (C++ template-metaprogramming) utilities

Project's dashboard

🔬 functional

Function & overload traits

See project's live demo on godbolt.org, dashboard

🔎 typeinfo

Compile-time demangler, for types & values.
Inconsistent: for educational and debugging purpose only.

See project's live demo on godbolt.org, dashboard

☔ ensure

Interface-safety related components, including a configurable strong-type implementation.

See project's dashboard

---

Supported C++ standard

Library	C++17	C++20	C++23
📦 ag	❌	✅	✅
🌊 wf	❌	✅	planned P1985 - Universal template parameters P0847 - Deducing this
🧙‍♂️ mp	❌	✅	-
🔬 functional	❌	✅	✅
🔎 typeinfo	❌	✅	✅
☔ ensure	✅	✅	✅

💡 Note that implementation details might changes from a version to another,
and in some cases, the source file itself.

For instance, we currently have: <csl/ensure.hpp> which either includes <csl/cxx_17/ensure.hpp>, or <csl/cxx_20/ensure.hpp> when C++20 or greater is available.

About C++17 support

💡 Backward compatibility with C++17 requires additional effort and IS NOT a priority for now, beside specific requests.

About C++23 support

⚠️ Implementations details might change once specific C++23 features are supported by targeted compilers.
👉 See opened issue tagged with C++23.

Supported compilers

Compiler	Min. version	Recommended	Reason
g++	>= 11.1.0	>= 13.2	C++20
clang++	>= 13.0.1	>= 16.0.6	C++20 Decent support of P0315r4 lambdas in unevaluated contexts
msvc-cl	TBD	TBD	-

---

Getting started

Getting started - using CMake

👉 This is the recommended way to integrate csl (or a subset of its components) to a project.

• FetchContent

  include(FetchContent)
  
  # Forces csl a options ...
  # example: set(CSL_ENABLE_ALL_TESTS OFF CACHE INTERNAL "")
  
  FetchContent_Declare(
      csl
      GIT_REPOSITORY https://github.com/GuillaumeDua/CppShelf.git
  )
  FetchContent_MakeAvailable(csl)

• ExternalProject_Add

CMake - options

General options:

Option	Type	Default	Description
CSL_BUILD_ALL	bool	ON	enable/disable all components build
CSL_ENABLE_ALL_TESTS	bool	OFF	enable/disable all components tests
CSL_ENABLE_ALL_EXAMPLES	bool	OFF	enable/disable all components examples

Components-specific options:

Option syntax	Type	Default	Description
CSL_BUILD_\<component_name\>	BOOL	CSL_BUILD_ALL	enable/disable a specific component build
CSL_TEST_\<component_name\>	BOOL	CSL_ENABLE_ALL_TESTS	enable/disable a specific component test
CSL_EXAMPLE_\<component_name\>	BOOL	CSL_ENABLE_ALL_EXAMPLES	enable/disable a specific component example

For options related to a specific component, refer to its dedicated documentation.

Getting started - header-only

Using the way you prefer, acquire a component/library file.

• wget shell command
• CMake file(DOWNLOAD <url> [<file>] [...])
• etc.

Use it in your project using an #include preprocessor directive.
Refer to the component's documention to check for configuration preprocessor constant.

Example:

#define CSL_ENSURE__ENABLE_FMT_SUPPORT // enable `fmt` support, if available
#include <csl/ensure.hpp>

void func(){
    using meters = csl::ensure::strong_type<int, struct meter_tag>;
    fmt::print(meters{ 42 });
}

In Compiler Explorer

See demonstration here.

#include <iostream>

#include <https://raw.githubusercontent.com/GuillaumeDua/CppShelf/main/includes/typeinfo/csl/typeinfo.hpp>
#include <https://raw.githubusercontent.com/GuillaumeDua/CppShelf/main/includes/ag/csl/ag.hpp>

struct some_model {
    char c = 'A';
    int i = 42;
};

auto main() -> int {
    std::cout
        << csl::typeinfo::type_name_v<
            csl::ag::element_t<0, some_model> // "char"
           >
    ;
    return csl::ag::get<1>(some_model{}); // 42
}

Possible output:

Program returned: 42
Program stdout
char

---

Misc

This Readme.md 's ressources

• Shelf icons created by juicy_fish - Flaticon