● Covered by 1 source · 1 reportLow impact1 neutral
Comparing Compile-Time Reflection in C++, Zig, and C3 Programming Languages
Key points
- C3 uses '$' prefix for explicit compile-time execution.
- C3 macros extend C preprocessor macros with compile-time evaluation.
- Zig lacks generic enum-to-string conversion and compile-time attributes.
- C3 supports compile-time contracts and attributes for validation.
Introduction to Compile-Time Reflection
Reflection enables a program to examine and modify its own structure during compilation or runtime. C++, Zig, and C3 all utilize compile-time reflection, allowing developers to reason about types, enumerators, and struct members without incurring runtime overhead. This comparison focuses on their respective implementations of this feature.
Overview of C3 Language Features
C3 is a new programming language designed for readability, performance, minimalism, and familiarity for C/C++ programmers. It avoids heavy runtime components like garbage collection, exceptions, or RAII, and offers full C ABI compatibility. C3 distinguishes compile-time execution with a '$' prefix for variables and control-flow constructs, making compile-time operations explicit.
C3's Macro System and Compile-Time Evaluation
C3 employs macros as a replacement for C preprocessor macros, enhancing them with compile-time evaluation through constant folding. This provides a limited, IDE-friendly compile-time execution environment. For example, C3 enums have special properties, allowing direct printing of their source-defined names (e.g., 'RED' instead of '0') and supporting associated values of any type.
Reflection Capabilities Across Languages
In enum-to-string conversion, C3 offers built-in readable output, while Zig requires attaching methods to individual enums, lacking a generic solution. For struct introspection and validation with compile-time attributes, Zig currently does not support attributes to attach compile-time data to struct members. C3, however, provides optional pre-conditions called 'contracts' for input validation, which execute at compile-time when possible, and supports mixing compile-time attributes with runtime logic.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
The daily brief
One email each morning: the day's tech stories, clustered across outlets and summarized. No account needed.
One email a day. Unsubscribe in one click, any time.
Today's brief
Spend a few minutes, get the whole day. Every topic's top stories in one hands-free rundown — listen, watch, or read the transcript.
▶ Play today's brief
New every morning, and the back catalogue is archived by date.
Reporting from
This article compares how C++, Zig, and C3 handle compile-time reflection, a feature allowing programs to inspect their structure at compile time. It highlights C3's distinct approach with explicit compile-time syntax and advanced macro capabilities, contrasting it with C++'s upcoming support and Zig's current limitations in generic reflection.