The interval operator has a lower precedence than, for example, binary
operations. This was unexpected and incorrectly implemented in the
output functions. For now, this is fixed by enclosing intervals in
parentheses to avoid misinterpretations.
The existing unit tests are adjusted to the updated output format.
This refactoring separates predicates from their declarations. The
purpose of this is to avoid duplicating properties specific to the
predicate declaration and not its occurrences in the program.
The unary modulus operation does not require extra parentheses to be
printed in cases like “|X + Y|”. This adds a new option to the printing
routine to omit parentheses in cases where the parent expression already
defines a parenthesis-like scope (currently only with unary operations).
Because of a bug in the Clingo API, the exponentation operator was not
properly exposed to anthem. This updates Clingo to a version with a
fixed API and adds proper support for exponentation within anthem along
with a matching unit test.
Patrick Lühne