Cppmatch – Rust-Like Pattern Matching and Error Handling for C++
I've created cppmatch, a lightweight, header-only C++ library that brings Rust-inspired pattern matching and error handling to C++. It tries to imitate the functionality of the questionmark (?) operator in C++ by using a macro that uses the gcc extension https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html This allows to create exceptionless code with non-intrusive error-as-value that unlike Exceptions, makes it clear which kinds of error a function can generate and forces you to handle (or ignore) them. The ? operator translates to *expect* To handle the errors I…
In plain words
Cppmatch is a header-only C++ library that brings Rust-style pattern matching and error handling to C++. It enables developers to write exception-free code using error-as-value semantics, making error types explicit and forcing explicit handling. The library includes a macro-based operator similar to Rust's question mark operator and a match function for handling results and std::variant types, designed for developers seeking safer error handling patterns in C++.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
I've created cppmatch, a lightweight, header-only C++ library that brings Rust-inspired pattern matching and error handling to C++. It tries to imitate the functionality of the questionmark (?) operator in C++ by using a macro that uses the gcc extension https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html This allows to create exceptionless code with non-intrusive error-as-value that unlike Exceptions, makes it clear which kinds of error a function can generate and forces you to handle (or ignore) them. The ? operator translates to *expect* To handle the errors I introduce *match* which allows to easily visit the contents of the result or any std::variant (you can use it to imitate rust enums) You can view an example of this project used in a "real way" in compiler-explorer: Simplified error types to just be a string: https://compiler-explorer.com/z/6j3866E7W Multiple structs as error types: https://compiler-explorer.com/z/encbf5f43 Feel free to give feedback or contribute to the project!
Does the same job
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