Page en français

The PCASTL is an interpreted high level programming language which makes writing self-modifying code easier. Its features are:

• The "parent" keyword to access a parent node in the code syntax tree.
• The "childset" keyword to access a child node in the code syntax tree.
• The use of explicit code segments delimited with ` and '.
• Allows calls to dynamic-link libraries, shared object libraries or dynamic libraries.
• Object, array and chained list data types. They are respectively created by internal functions names, array and list.
• ANSI stdio.h interface for single-byte strings functions.
• Turing complete.

The most recent version is 2.4 and was released on 2012-11-11.
List of changes.

So, what's a syntax tree?

For example, inside the interpreter, the tree having its root in the variable fact after the following code has been executed:

fact = function(x)
{
   if (x == 1) return(1)
   return(x * fact(x - 1))
}

is: