Product Information
What is Ragel?
Ragel is a finite state machine compiler and a parser generator for C, C++, and ASM. It can recognize byte sequences and execute code at any point during the process.
Potential Uses
- Writing robust protocol implementations.
- Parsing data formats.
- Lexical analysis for programming languages.
- Validating user input.
Features
- Construct finite state machines using:
- Regular language operators
- State chart operators
- Scanner operators
- A mix of the above
- Embed actions anywhere in the machine.
- Control non-determinism with guarded operators.
- Minimize state machines using Hopcroft's algorithm.
- Visualize output with Graphviz.
- Use byte, double-byte, or word-sized alphabets.
- Generate dependency-free C, C++, or ASM (GNU, x86_64, System V ABI) code.
- Choose between table-driven or control-flow-driven state machines.
How to use Ragel?
Ragel is a finite state machine compiler and parser generator that compiles regular expressions into executable finite state machines. It allows executing code at arbitrary points during byte sequence recognition, primarily targeting C, C++, and ASM languages.
Core Functions of Ragel
State machine
Usage Scenarios of Ragel
- Write robust protocol implementations
- Parse data formats
- Perform lexical analysis for programming languages
- Validate user input
Common Questions about Ragel
What does Ragel do?
How do I use Ragel?
What are the core features of Ragel?
What are the application scenarios of Ragel?





















