bool Predicate::operator==(const Predicate& other) const {
if (kind() != other.kind()) {
return false;
}
switch (kind()) {
case TRUE:
case FALSE:
case SELFCONST:
{
return true;
}
case AND:
{
return andLeft() == other.andLeft() && andRight() == other.andRight();
}
case OR:
{
return orLeft() == other.orLeft() && orRight() == other.orRight();
}
case SATISFIES:
{
return satisfiesType() == other.satisfiesType() &&
satisfiesRequirement() == other.satisfiesRequirement();
}
case VARIABLE:
{
return variableTemplateVar() == other.variableTemplateVar();
}
}
locic_unreachable("Unknown predicate kind.");
}
Predicate Predicate::And(Predicate left, Predicate right) {
if (left.isFalse() || right.isFalse()) {
return Predicate::False();
} else if (left.isTrue()) {
return right;
} else if (right.isTrue()) {
return left;
} else if (left == right) {
return left;
} else if (left.isAnd() && (left.andLeft() == right || left.andRight() == right)) {
return left;
} else if (right.isAnd() && (right.andLeft() == left || right.andRight() == left)) {
return right;
}
Predicate predicate(AND);
predicate.left_ = std::unique_ptr<Predicate>(new Predicate(std::move(left)));
predicate.right_ = std::unique_ptr<Predicate>(new Predicate(std::move(right)));
return predicate;
}