Extempore is a systems programming language designed to support the programming of real-time systems in real-time. Extempore promotes human orchestration as a meta model of real-time man-machine interaction in an increasingly distributed and environmentally aware computing context.
Extempore is designed to support a style of programming dubbed 'cyberphysical' programming. Cyberphysical programming supports the notion of a human programmer operating as an active agent in a real-time distributed network of environmentally aware systems. The programmer interacts with the distributed real-time system procedurally by modifying code on-the-fly. In order to achieve this level of on-the-fly interaction Extempore is designed from the ground up to support code hot-swapping across a distributed heterogeneous network, compiler as service, real-time task scheduling and a first class semantics for time.
Extempore is designed to mix the high-level expressiveness of Lisp with the low-level expressiveness of C. Extempore is a statically typed, type-inferencing language with strong temporal semantics and a flexible concurrency architecture in a completely hot-swappable runtime environment. Extempore makes extensive use of the LLVM project to provide back-end code generation across a variety of architectures.
For more detail on what the Extempore project is all about, see the Extempore philosophy.
To see Extempore in action, check out these videos:
- interactive, distributed, physics simulation
- graphics demo
- general introduction
- a more technical intro
These are the quick-start options---see INSTALL.md for details in how to build from source.
If you're a homebrew user, it's pretty straightforward:
brew tap benswift/extempore brew install extempore --with-extended
If you get stuck, or want to find out more about the installation instructions, there are more detailed instructions here.
On Linux, you can you can build from source
Windows installation instructions are provided in INSTALL.md as well.
You don't need to do anything special to run extempore, it'll just run in any terminal (or command prompt on Windows).
The running extempore process acts as a server, and you send extempore
code to the server for evaluation (by default on port
you've started extempore you can connect using either telnet,
or whatever you like. The Emacs support is probably the most mature at
the moment, but patches are welcome for other editors.
There are some optional command line options that you may want to use
you can get a list by running
For more detail, see this post on interacting with the Exempore compiler.
Docs & Community
More Extempore documentation can be found at http://benswift.me/extempore-docs/index.html
You can also join the Extempore community:
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