_____   __    ____   ____
  ( // )) // )) //     //
   //~~  // //  ~~~~  //~~
(_// || ((_//  ___// //___

As the name suggests, ROSE is an Obscure Scheme Evaluator. Please refer to the Wiki pages for details.

NOTE: ROSE is still in an very early stage, currently the interpreter is barely runnable. Although ROSE aims to be R7RS compatible, many features required by R5RS are still missing.

ROSE depends on the following tools and libraries:

• Quex, the lexer generator, v0.63.2 or newer
• SCons, the construction tool, v2.1.0 or newer
• GLib, the GNOME Library, v2.0 or newer
• GMP, the GNU Multiple Precesion Arithmetic Library, v5.0.2 or newer
• googletest, Google C++ Testing Framework, v1.6 or newer
• LCOV, the LTP GCOV extension, v1.9 or newer

Quex and googletest have already been included in the external directory. All the other dependencies can be installed with the following command:

$ sudo aptitude install libgmp-dev libglib2.0-dev scons lcov

Check out the code and run scons to build ROSE:

$ git clone git://github.com/liancheng/rose.git
$ cd rose
$ scons

To generate test coverage report, run:

$ scons -c coverage=1
$ scons coverage=1

then check the HTML report from build/test/html/index.html.

After the building process, you may find the ROSE interpreter executable rsi under bin:

$ ./bin/rsi
(display "hello world\n")
^D
hello world

Here is the factorial example (input is read from the terminal):

$ ./bin/rsi test/script/factorial.scm
42
1405006117752879898543142606244511569936384000000000

You may also try the famous yin-yang script:

$ ./bin/rsi test/script/yin-yang.scm
@*@**@***@****@*****@******@*******...