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wtf is sprache?

martindevans/sprache — explained in plain English

Analysis updated 2026-08-07 · repo last pushed 2015-11-11

C#Audience · developerComplexity · 2/5DormantSetup · easy

TL;DR

Sprache is a lightweight C# library for building text parsers directly in code, filling the gap between fragile regular expressions and heavyweight parser generators like ANTLR.

Mindmap

mindmap
  root((repo))
    What it does
      Parses structured text
      Combines small parser rules
      No code generation needed
    Use cases
      Parse config files
      Custom query languages
      Template expressions
      CSV and XML parsing
    Tech stack
      C sharp
      DotNET
      Single small assembly
    Audience
      DotNET developers
      Tool builders
    Key qualities
      Lightweight and simple
      Reads like plain code
      No external tooling

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

Parse custom configuration files or connection strings in a .NET application.

REASON 2

Build a mini-language for query filters or template expressions.

REASON 3

Evaluate numeric expressions or read structured formats like CSV and XML.

REASON 4

Interpret structured user input without relying on fragile regular expressions.

What's in the stack?

C#.NET

How it stacks up

martindevans/sprache0verflowme/factoritalexander-gekov/media-bazar-app
LanguageC#C#C#
Last pushed2015-11-112020-08-272020-08-29
MaintenanceDormantDormantDormant
Setup difficultyeasymoderatehard
Complexity2/53/52/5
Audiencedeveloperresearchergeneral

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 5min

Just reference the NuGet package in your .NET project and start writing parser rules in C#.

The license information is not mentioned in the explanation.

Wtf does this do

Sprache is a lightweight C# library that helps you build text parsers directly in your code. Instead of wrestling with regular expressions for anything beyond the simplest patterns, or adopting a heavyweight toolset like ANTLR, Sprache sits in between, giving you a straightforward way to describe what text should look like and how to extract meaning from it. You build parsers by combining small pieces into bigger ones. For example, you can say "match the letter A at least once" and then combine that with other rules to recognize more complex patterns. The code reads somewhat like a description of what you're trying to parse. You might define what a variable name looks like (a letter followed by letters or digits, with optional spaces around it), and then feed it a string to get back the cleaned-up result. No build-time code generation or external tooling is required, you just reference the library and write your parsing rules in regular C#. People who'd use this are typically .NET developers building tools that need to interpret structured text. The README points to several real-world examples: Octopus Deploy uses it for a template language, Seq uses it to parse structured log queries, and EasyNetQ uses it to parse connection strings. It's also been used to parse XML, evaluate numeric expressions, and read CSV files. If your application needs to accept user input in some mini-language or custom format, configuration files, query filters, template expressions, this library handles the grunt work of turning that text into structured data your program can work with. What's notable is its simplicity. It's a single small assembly with no build steps or code generation. The README is upfront that it's not competing with full language workbenches, it's a pragmatic middle ground when regular expressions feel too fragile but a full parser generator feels like overkill.

Yoink these prompts

Prompt 1
Using the Sprache C# library, write a parser that extracts a key-value pair separated by an equals sign, trimming any whitespace, and returns the result as a tuple.
Prompt 2
Using Sprache, create a parser that recognizes a simple numeric expression with addition and subtraction, returning the computed integer result.
Prompt 3
Write a Sprache parser that reads a quoted string literal and returns the inner text without the quotes.
Prompt 4
Using Sprache, build a parser that matches a C-style identifier (a letter or underscore followed by letters, digits, or underscores) and returns it as a string.

Frequently asked questions

wtf is sprache?

Sprache is a lightweight C# library for building text parsers directly in code, filling the gap between fragile regular expressions and heavyweight parser generators like ANTLR.

What language is sprache written in?

Mainly C#. The stack also includes C#, .NET.

Is sprache actively maintained?

Dormant — no commits in 2+ years (last push 2015-11-11).

What license does sprache use?

The license information is not mentioned in the explanation.

How hard is sprache to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is sprache for?

Mainly developer.

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