ureflect

Header-only C++23 compile-time reflection library Generates field names, types, and tuples directly from user-defined structs — no macros, no runtime cost, no external dependencies.

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✨ Features

• Compile-time reflection for plain structs and enums
• Up to 128 fields supported per struct
• Generates:
  • member_names<T> — array of field names
  • member_types<T> — tuple of field types
  • to_tie(obj) — tie of field references for iteration or mapping
• Works without RTTI or macros
• Zero runtime overhead — pure constexpr
• Compatible with modern compilers (Clang ≥16, GCC ≥13, MSVC ≥19.36)

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⚙️ Example

#include <ureflect/ureflect_auto.h>
#include <iostream>

struct User {
    int id;
    std::string name;
    double balance;
};

int main() {
    User u{1, "Alice", 42.5};

    ureflect::for_each_field(u, [](std::string_view name, auto &value) {
        std::cout << name << ": " << value << '\n';
    });

    ureflect::for_each_field(u, [](std::string_view, auto &v) {
        if constexpr (std::is_same_v<std::remove_reference_t<decltype(v)>, double>)
            v += 10.0;
    });

    ureflect::for_each_field(u, [](std::string_view name, auto &value) {
        std::cout << name << ": " << value << '\n';
    });
}

Output:

id: 1
name: Alice
balance: 42.5

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🧩 Integration

CMake

find_package(ureflect REQUIRED)
target_link_libraries(your_target PRIVATE ureflect)

or simply:

#include <ureflect/ureflect_auto.h>

since the library is header-only.

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🏗️ Build & Install

cmake -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build
sudo cmake --install build

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🧠 Typical Use Cases

• Automatic JSON/SQL/GraphQL mapping
• PostgreSQL row-to-struct conversion
• OpenAPI schema generation
• Serialization and deserialization frameworks
• ORM/DTO meta generation

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📜 License

MIT License © Usub Development