% A search annotation that supplies a function to be executed on restart
ann: on_restart(string: pred); @\Vlabel{ann:on_restart}@
% An annotation for FlatZinc that accesses solver state   
ann: solver_state;
% The 'status' function reports the status of the solver (before restarting).
enum STATUS = {START, UNKNOWN, UNSAT, SAT, OPT} @\Vlabel{ann:enum_status}@
function var STATUS: status(); @\Vlabel{ann:status}@
% The 'sol' functions provides access to solution values of model variables. 
% The sol functions are meaningful when the solver status is not START.
function var bool: sol(var bool: x); @\Vlabel{ann:sol1}@
function var float: sol(var float: x); @\Vlabel{ann:sol2}@
function var int: sol(var int: x); @\Vlabel{ann:sol3}@
function var set of int: sol(var set of int: x); @\Vlabel{ann:sol4}@
% The 'last_val' functions provides access to the last assigned value of variables.
% The last_val functions are meaningful when the solver status is not START.
function var bool: last_val(var bool: x);
function var float: last_val(var float: x);
function var int: last_val(var int: x);
function var set of int: last_val(var set of int: x);