A tiny, friendly, C# parser construction library for building parsers directly in code using parser combinators.
Sprache is a C# library for building parsers using parser combinators, allowing developers to define parsers directly in their code without external tools. It solves the problem of parsing custom languages, expressions, or data formats in a lightweight, integrated manner within .NET applications. It's designed for scenarios where regular expressions are insufficient but full parser generators are overkill.
C# developers needing to parse custom domain-specific languages, configuration formats, expressions, or structured text within their applications, especially those who prefer a code-first approach over external grammar files.
Developers choose Sprache for its simplicity, seamless integration with C# and LINQ, and minimal overhead—it's a single assembly with no build-time dependencies. It offers a pragmatic, composable way to build parsers that are easier to debug and maintain compared to traditional parser generators.
A tiny, friendly, C# parser construction library
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.
Parsers are built directly in C# code using a fluent API, eliminating external grammar files and build steps, which simplifies debugging and aligns with .NET workflows.
Uses parser combinators and LINQ queries to create modular parsers from smaller ones, making complex parsing logic readable and maintainable, as shown in the identifier parser example.
Distributed as a single small assembly with no heavy dependencies, ensuring easy integration into any .NET project without bloating the solution.
Widely used in real-world systems like Octopus Deploy and Seq for parsing DSLs and expressions, demonstrating stability in enterprise environments.
Parser combinators can be slower for large inputs or deep grammars due to recursion and backtracking, making it less suitable for performance-sensitive applications.
Lacks features like sophisticated error recovery, incremental parsing, or IDE integration common in industrial parser generators, which can hinder large language projects.
Requires understanding monadic concepts and functional programming patterns, which may be challenging for developers only familiar with imperative C# code.
Sprache is an open-source alternative to the following products: