Colm = COmputer Language Machinery

Colm is a programming language designed for the analysis
and transformation of computer languages.
Colm is influenced primarily by TXL.
What is a transformation language?

A transformation language has a type system based on formal languages.
Rather than defining classes or data structures, one defines grammars.

A parser is constructed automatically from the grammar,
and the parser is used for two purposes:
*   to parse the input language,
*and to parse the structural patterns in the program that performs the analysis.

In this setting, grammar-based parsing is critical because it guarantees
that both the input and the structural patterns are parsed
into trees from the same set of types, allowing comparison.

Colm's features

Colm is not-your-typical-scripting-language (tm):
*   Colm's main contribution lies in the parsing method.
*   Colm's parsing engine is generalized, but it also allows
   for the construction of arbitrary global data structures
   that can be queried during parsing. In other generalized methods,
   construction of global data requires some very careful consideration
   because of inherent concurrency in the parsing method.
   It is such a tricky task that it is often avoided altogether and the problem
   is deferred to a post-parse disambiguation of the parse forest.
*   By default Colm will create an elf executable that can be used standalone
   for that actual transformations.
*   Colm is a static and strong typed scripting language.
*   Colm is very tiny and fast and can easily be embedded/linked with c/cpp programs.
*   Colm's runtime is a stackbased VM that starts with the bare minimum
   of the language and bootstraps itself.

• Aleksei Nikiforov

• colm
• colm-debuginfo
• libcolm
• libcolm-debuginfo