Datatype99 is a C99 extension that facilitates the creation of algebraic data types (ADTs) with enhanced safety and expressiveness. It allows developers to define sum types and tagged unions in a more intuitive and type-safe manner compared to traditional methods. Datatype99 leverages macros and a novel syntax to generate efficient and predictable code, primarily relying on compile-time macro expansion.
Datatype99 offers type-safe pattern matching, ensuring compile-time detection of errors like invalid variant access. It's portable, requiring only a standard C99 compiler without external dependencies. The system provides predictable data layout through formal code generation semantics. Datatype99 enhances error resilience and is battle-tested in real-world applications like OpenIPC. It provides flexible design decisions and a comprehensive approach to ADTs.
- Type-safe: Compile-time checks for invalid variant access and exhaustive matching.
- Portable: Requires only a standard C99 compiler, no external libraries.
- Predictable: Ensures consistent data layout through code generation semantics.
- Extensible: Supports custom data constructors and derived types.
- Concise syntax: Simplifies the definition and manipulation of ADTs.
- Compile-time introspection: Enables querying type information at compile time.
- Performance: Generates efficient code without runtime overhead.
Datatype99 is a mature project with a history of use in production systems, including OpenIPC. The project has a solid release history, active maintenance, and a growing community. Extensive documentation and examples are available, contributing to its reliability. Recent commits indicate ongoing development and support.
Datatype99 benefits developers by providing a safer and more concise way to handle complex data structures in C. It's particularly valuable for projects requiring robust error handling, predictable data layouts, and compile-time type safety. It reduces boilerplate code compared to traditional tagged unions and offers a clear and expressive syntax for defining and manipulating data.