SOM++ - The Simple Object Machine implemented in C++
SOM is a minimal Smalltalk dialect used to teach VM construction at the Hasso Plattner Institute. It was originally built at the University of Århus (Denmark) where it was also used for teaching.
Currently, implementations exist for Java (SOM), C (CSOM), C++ (SOM++), Python (PySOM), RPython (RPySOM), the Truffle framework (TruffleSOM), and Squeak/Pharo Smalltalk (AweSOM).
A simple SOM Hello World looks like:
Hello = ( run = ( 'Hello World!' println. ) )
This repository contains the C++ implementation of SOM, including an implementation of the SOM standard library and a number of examples. Please see the main project page for links to the VM implementations.
SOM++ can be built with Make:
Afterwards, the tests can be executed with:
$ ./SOM++ -cp Smalltalk TestSuite/TestHarness.som
A simple Hello World program is executed with:
$ ./SOM++ -cp Smalltalk Examples/Hello/Hello.som
Note: On Linux, the library search path needs to be adapted:
$ export LD_LIBRARY_PATH=.
The debug version of CSOM can be built using the
$ make debug
Information on previous authors are included in the AUTHORS file. This code is
distributed under the MIT License. Please see the LICENSE file for details.
Additional documentation, detailing for instance the object model and how to
implement primitives, is available in the
Advanced Compilation Settings
SOM++ supports different garbage collectors, including a basic mark/sweep, and a generational GC. Furthermore, it implements different variants for integer handling.
default: off option name: TAGGING example: make TAGGING=true
default: off option name: INT_CACHE example: make INT_CACHE=true