STklos is a Scheme implementation that succeeded STk. It is a bytecode compiler with an ad hoc virtual machine which aims to be fast as well as light. STklos is free software, released under the

GNU General Public License The GNU General Public Licenses (GNU GPL or simply GPL) are a series of widely used free software licenses, or ''copyleft'' licenses, that guarantee end users the freedom to run, study, share, or modify the software. The GPL was the first ...

. In addition to implementing most of R⁵RS, and a large part of R⁷RS, STklos supports: * an object system based on

CLOS Clos may refer to: People * Clos (surname) Other uses * CLOS, Command line-of-sight, a method of guiding a missile to its intended target * Clos network, a kind of multistage switching network * Clos (vineyard), a walled vineyard; used in Fra ...

with

multiple inheritance Multiple inheritance is a feature of some object-oriented computer programming languages in which an object or class can inherit features from more than one parent object or parent class. It is distinct from single inheritance, where an object ...

generic function In computer programming, a generic function is a function defined for polymorphism. In statically typed languages In statically typed languages (such as C++ and Java), the term ''generic functions'' refers to a mechanism for ''compile-time p ...

multimethods Multiple dispatch or multimethods is a feature of some programming languages in which a function or method can be dynamically dispatched based on the run-time (dynamic) type or, in the more general case, some other attribute of more than one of ...

and a MOP * a module system * easy connection with the

GTK GTK (formerly GIMP ToolKit and GTK+) is a free software cross-platform widget toolkit for creating graphical user interfaces (GUIs). It is licensed under the terms of the GNU Lesser General Public License, allowing both Free software, free and ...

toolkit * a low-level macro system that compiles macro expanders into bytecode (syntax-rules is also present as a high-level macro system) * a full Numerical tower implementation, as defined in R⁷RS *

Unicode Unicode or ''The Unicode Standard'' or TUS is a character encoding standard maintained by the Unicode Consortium designed to support the use of text in all of the world's writing systems that can be digitized. Version 16.0 defines 154,998 Char ...

support * Perl compatible regular expressions via

PCRE Perl Compatible Regular Expressions (PCRE) is a library written in C, which implements a regular expression engine, inspired by the capabilities of the Perl programming language. Philip Hazel started writing PCRE in summer 1997. PCRE's synta ...

library * a simple

foreign function interface A foreign function interface (FFI) is a mechanism by which a program written in one programming language can call routines or make use of services written or compiled in another one. An FFI is often used in contexts where calls are made into a bin ...

via

libffi libffi is a foreign function interface library. It provides a C programming language interface for calling natively compiled functions given information about the target function at run time instead of compile time. It also implements the oppo ...

* being compiled as a library and embedded in an application * native threads, using the libpthread library. The API conforms to SRFI-18 * a number of SRFIs * easy access to SLIB * an HTTP client

References

External links

STklos home page

Scheme (programming language) interpreters Scheme (programming language) implementations {{compu-prog-stub