Semblis is intended to be a simple embedded language that is both easy to
use and easy to extend. It is not intended to be a general purpose
programming language. The general use case is in having a tightly controlled
language one wishes to use to "script" a low-level language such as C or
C++. The word Semblis is a play on words meaning simple embedded lisp. The
syntax is very close to scheme and is in fact loosely modeled on the
explicit control evaluator presented in Structure and Interpretation of
Computer Programs. It does not however support all of the features or
standard functions of modern scheme standards. What is does support is tail
recursion optimization, mark-and-sweep garbage collection, unicode strings,
double-precision arithmetic, macros, data/symbols, and modules/imports.

The core language itself is very small, supporting only a handful of core
functions. The language is meant to be extended through either macros or
plugins. The plugin system is controlled through a relatively simple api and
plugins are specified through config files and loaded at runtime. The macro
system is likewise very simple but does get the job done.

The purpose of Semblis probably most closely resembles a language such as
Lua in that it is mainly meant to be embedded inside another piece of
software. I originally wrote Semblis in order to implement a lisp dialect in
C. Another project I work on took interest and the direction of Semblis
became much more refined.