@Specialization
public Object delete(RubyHash hash, Object index) {
hash.checkFrozen();
final Object value = hash.getMap().remove(index);
if (value == null) {
return NilPlaceholder.INSTANCE;
} else {
return value;
}
}
@Specialization
public Object construct(VirtualFrame frame, RubyHash hash, Object index) {
final Object value = hash.get(index);
if (value == null) {
if (hash.defaultBlock == null) {
return NilPlaceholder.INSTANCE;
} else {
return hash.defaultBlock.call(frame.pack(), hash, index);
}
} else {
return value;
}
}
@Specialization
public RubyHash construct(Object[] args) {
final RubyHash hash = new RubyHash(getContext().getCoreLibrary().getHashClass());
if (args.length == 1) {
final RubyArray array = (RubyArray) args[0];
for (int n = 0; n < array.size(); n++) {
final RubyArray keyValue = (RubyArray) array.get(n);
hash.put(keyValue.get(0), keyValue.get(1));
}
} else {
if (args.length % 2 != 0) {
// TODO(CS): figure out what error to throw here
throw new UnsupportedOperationException();
}
for (int n = 0; n < args.length; n += 2) {
hash.put(args[n], args[n + 1]);
}
}
return hash;
}
@Specialization
public Object construct(RubyHash hash, Object index, Object value) {
hash.put(index, value);
return value;
}
@Specialization
public NilPlaceholder initialize(RubyHash hash, RubyProc block) {
hash.initialize(block);
return NilPlaceholder.INSTANCE;
}
@Specialization
public NilPlaceholder initialize(
RubyHash hash, @SuppressWarnings("unused") UndefinedPlaceholder block) {
hash.initialize(null);
return NilPlaceholder.INSTANCE;
}