1.11 Version 2.1 Release Notes

In addition to several bug fixes, the 2.1 versions provide some new features:

• setarg/3
  A new predicate setarg/3 for extra-logical (destructive) assignment to arguments of terms is provided.
• Modified keysort/2
  keysort/2 is now stable with regard to multiple values on the same key. Makes this predicate compatible with SICStus and Quintus.
• Modified grammar rule expansion
  DCG translation of free variables now calls phrase/3, which has been changed slightly to deal with `un-parsing'. Modification is probably not complete, but it fixes some problems encountered by Michael Böhlen.
• Exception handling
  The top of the runtime stack are automatically dumped on floating point exceptions.
• Foreign interface
  Added facilities to allow for embedding SWI-Prolog in C applications.