// We never infer properties as optional on loose objects,
// and we don't warn about possibly inexistent properties.
boolean isLooseSubtypeOf(ObjectType other) {
Preconditions.checkState(isLoose || other.isLoose);
if (other == TOP_OBJECT) {
return true;
}
if (!isLoose) {
if (!objectKind.isSubtypeOf(other.objectKind)) {
return false;
}
for (String pname : other.props.keySet()) {
QualifiedName qname = new QualifiedName(pname);
if (!mayHaveProp(qname) || !getProp(qname).isSubtypeOf(other.getProp(qname))) {
return false;
}
}
} else { // this is loose, other may be loose
for (String pname : props.keySet()) {
QualifiedName qname = new QualifiedName(pname);
if (other.mayHaveProp(qname) && !getProp(qname).isSubtypeOf(other.getProp(qname))) {
return false;
}
}
}
if (other.fn == null) {
return this.fn == null || other.isLoose();
} else if (this.fn == null) {
return isLoose;
}
return fn.isLooseSubtypeOf(other.fn);
}
public boolean mayHaveProp(QualifiedName qname) {
if (objs == null) {
return false;
}
for (ObjectType o : objs) {
if (o.mayHaveProp(qname)) {
return true;
}
}
return false;
}
public JSType getProp(QualifiedName qname) {
if (isBottom() || isUnknown()) {
return UNKNOWN;
}
Preconditions.checkState(objs != null);
JSType ptype = BOTTOM;
for (ObjectType o : objs) {
if (o.mayHaveProp(qname)) {
ptype = join(ptype, o.getProp(qname));
}
}
if (ptype.isBottom()) {
return null;
}
return ptype;
}