Introduction to NextStd

Welcome to the official documentation for NextStd—the safer, modern alternative to the traditional C standard library.

For decades, C developers have relied on <stdio.h>, <string.h>, and <stdlib.h>. While incredibly fast, these legacy libraries are fundamentally unsafe. A single mismatched %d in a printf, a missing \0 in a string, or a silent NULL pointer can trigger catastrophic Segmentation Faults, buffer overflows, and security vulnerabilities.

NextStd fixes this at the foundation.

By combining the elegant simplicity of C11 macros on the frontend with the mathematically proven memory safety of Rust on the backend, NextStd delivers a zero-compromise development experience.

Core Pillars of NextStd

• Type-Safe I/O: Never write a format specifier again. NextStd uses C11 _Generic macros to automatically route data types at compile time.
• Crash-Proof Control Flow: Replace silent failures and dangerous goto statements with Python-style NS_TRY and NS_EXCEPT macros.
• Immunity to NULL: Every FFI boundary rigorously checks for NULL pointers. Passing bad memory to NextStd gracefully returns an error code instead of killing your program.
• Modern String Memory: Strings are powered by Small String Optimization (SSO), meaning short text costs zero heap allocations, and massive text safely catches Out-Of-Memory (OOM) errors without panicking.

Who is this for?

NextStd is built for C developers, systems programmers, and embedded engineers who want the safety guarantees of a modern language without actually having to rewrite their entire codebase in Rust. It compiles down to a standard static or dynamic C library (.a, .so, .dylib, or .dll) and links identically t o any standard C dependency.

Ready to upgrade your C code?

Navigate through this book using the sidebar to the left. We recommend starting with Why NextStd? for a deeper dive into the architectural philosophy, or jumping straight into Getting Started to write your first safe program!