Term* Term::evalute_term(map<Term*, SatValue>& assignments)
{
switch(this->get_term_type())
{
case CONSTANT_TERM:
return this;
case VARIABLE_TERM:
{
if(assignments.count(this) > 0){
return ConstantTerm::make(assignments[this].value.to_int());
}
return this;
}
case FUNCTION_TERM:
{
if(assignments.count(this) > 0){
return ConstantTerm::make(assignments[this].value.to_int());
}
vector<Term*> new_args;
FunctionTerm* ft = (FunctionTerm*) this;
for(unsigned int i = 0; i < ft->get_args().size(); i++)
{
Term* arg = ft->get_args()[i];
arg = arg->evalute_term(assignments);
new_args.push_back(arg);
}
Term* new_t =
FunctionTerm::make(ft->get_id(), new_args, ft->is_invertible());
if(assignments.count(new_t) > 0)
return ConstantTerm::make(assignments[new_t].value.to_int());
return new_t;
}
case ARITHMETIC_TERM:
{
ArithmeticTerm* at = (ArithmeticTerm*) this;
Term* res = ConstantTerm::make(at->get_constant());
const map<Term*, long int>& elems = at->get_elems();
map<Term*, long int>::const_iterator it = elems.begin();
for(; it!=elems.end(); it++)
{
Term* t = it->first;
Term* val = t->evalute_term(assignments);
res = res->add(val->multiply(it->second));
}
if(assignments.count(res) > 0)
return ConstantTerm::make(assignments[res].value.to_int());
return res;
}
default:
assert(false);
}
}
