61 lines
3.1 KiB
Markdown
61 lines
3.1 KiB
Markdown
|
[](https://github.com/cisco/ChezScheme/actions/workflows/test.yml)
|
||
|
|
|
||
|
|
Chez Scheme is both a programming language and an implementation
|
||
|
|
of that language, with supporting tools and documentation.
|
||
|
|
|
||
|
|
As a superset of the language described in the
|
||
|
|
[Revised<sup>6</sup> Report on the Algorithmic Language Scheme](http://www.r6rs.org)
|
||
|
|
(R6RS), Chez Scheme supports all standard features of Scheme,
|
||
|
|
including first-class procedures, proper treatment of tail calls,
|
||
|
|
continuations, user-defined records, libraries, exceptions, and
|
||
|
|
hygienic macro expansion.
|
||
|
|
|
||
|
|
Chez Scheme also includes extensive support for interfacing with C
|
||
|
|
and other languages, support for multiple threads possibly running
|
||
|
|
on multiple cores, non-blocking I/O, and many other features.
|
||
|
|
|
||
|
|
The Chez Scheme implementation consists of a compiler, run-time
|
||
|
|
system, and programming environment.
|
||
|
|
Although an interpreter is available, all code is compiled by
|
||
|
|
default.
|
||
|
|
Source code is compiled on-the-fly when loaded from a source file
|
||
|
|
or entered via the shell.
|
||
|
|
A source file can also be precompiled into a stored binary form and
|
||
|
|
automatically recompiled when its dependencies change.
|
||
|
|
Whether compiling on the fly or precompiling, the compiler produces
|
||
|
|
optimized machine code, with some optimization across separately
|
||
|
|
compiled library boundaries.
|
||
|
|
The compiler can also be directed to perform whole-program compilation,
|
||
|
|
which does full cross-library optimization and also reduces a
|
||
|
|
program and the libraries upon which it depends to a single binary.
|
||
|
|
|
||
|
|
The run-time system interfaces with the operating system and supports,
|
||
|
|
among other things, binary and textual (Unicode) I/O, automatic
|
||
|
|
storage management (dynamic memory allocation and generational
|
||
|
|
garbage collection), library management, and exception handling.
|
||
|
|
By default, the compiler is included in the run-time system, allowing
|
||
|
|
programs to be generated and compiled at run time, and storage for
|
||
|
|
dynamically compiled code, just like any other dynamically allocated
|
||
|
|
storage, is automatically reclaimed by the garbage collector.
|
||
|
|
|
||
|
|
The programming environment includes a source-level debugger, a
|
||
|
|
mechanism for producing HTML displays of profile counts and program
|
||
|
|
"hot spots" when profiling is enabled during compilation, tools for
|
||
|
|
inspecting memory usage, and an interactive shell interface (the
|
||
|
|
expression editor, or "expeditor" for short) that supports multi-line
|
||
|
|
expression editing.
|
||
|
|
|
||
|
|
The R6RS core of the Chez Scheme language is described in
|
||
|
|
[The Scheme Programming Language](http://www.scheme.com/tspl4/),
|
||
|
|
which also includes an introduction to Scheme and a set of example programs.
|
||
|
|
Chez Scheme's additional language, run-time system, and
|
||
|
|
programming environment features are described in the
|
||
|
|
[Chez Scheme User's Guide](http://cisco.github.io/ChezScheme/csug9.5/csug.html).
|
||
|
|
The latter includes a shared index and a shared summary of forms,
|
||
|
|
with links where appropriate to the former, so it is often the best
|
||
|
|
starting point.
|
||
|
|
|
||
|
|
Get started with Chez Scheme by [Building Chez Scheme](BUILDING).
|
||
|
|
|
||
|
|
For more information see the [Chez Scheme Project Page](https://cisco.github.io/ChezScheme/).
|