.toType(ComponentSelector.class)
            .fromCharSequence(new StringConverter())
            .converter(new MapConverter())
            .fromType(Project.class, new ProjectConverter());

    public static NotationParser<Object, Set<ComponentSelector>> multiParser() {
        return builder().toFlatteningComposite();
    }

	t, ok := timeVal.ToTimestamp()
	if !ok {
		return nil, errNonTimestampArg
	}

	return extract(strings.ToUpper(e.Timeword), t)
}

func errUnsupportedCast(fromType, toType string) error {
	return fmt.Errorf("Cannot cast from %v to %v", fromType, toType)
}

func errCastFailure(msg string) error {
	return fmt.Errorf("Error casting: %s", msg)
}

// Allowed cast types
const (
	castBool      = "BOOL"

// will delete each orphaned "from" vertex, but will never delete the "to" vertex
func (g *Graph) deleteEdges_locked(fromType, toType vertexType, toNamespace, toName string) {
	// get the "to" side
	toVert, exists := g.getVertex_rlocked(toType, toNamespace, toName)
	if !exists {
		return
	}

	// delete all edges between vertices of fromType and toVert
	neighborsToRemove := []*namedVertex{}
	edgesToRemove := []graph.Edge{}

        this.notationParsers.add(converter);
        return this;
    }

    /**
     * Adds a converter that accepts only notations of the given type.
     */
    public <S extends N> NotationParserBuilder<N, T> fromType(Class<S> notationType, NotationConverter<? super S, ? extends T> converter) {
        this.notationParsers.add(new TypeFilteringNotationConverter<Object, S, T>(notationType, converter));
        return this;
    }

    /**

}

double SimpleHardware::GetHardwareSwitchingCost(const TargetHardware* from,
                                                size_t buffer_size) const {
  auto from_type = from->GetTypeId();
  auto to_type = GetTypeId();
  if (from_type == to_type) return 0.0f;

  // TODO(renjieliu): Implement a better version for different hardware cases.
  return buffer_size * kCrossHardwareTransferPerByteCost / 8.0 +

  static constexpr char kId[] = "CPU";

  double GetHardwareSwitchingCost(const TargetHardware* from,
                                  size_t buffer_size) const override {
    auto from_type = from->GetTypeId();
    auto to_type = GetTypeId();
    if (from_type == to_type) return 0.0f;

    // TODO(renjieliu): Implement a better version for different hardware cases.
    return buffer_size * kCrossHardwareTransferPerByteCost / 8.0 +

  return patterns;
}

double GpuHardware::GetHardwareSwitchingCost(const TargetHardware* from,
                                             size_t buffer_size) const {
  auto from_type = from->GetTypeId();
  auto to_type = GetTypeId();
  if (from_type == to_type) return 0.0f;

  // TODO(renjieliu): Implement a better version for different hardware cases.
  return buffer_size * kCrossHardwareTransferPerByteCost / 8.0 +

type AddrPos struct {
	Addr
	Pos OperandPos
}

type OperandPos int8

const (
	Source OperandPos = iota
	Destination
)

// From3Type returns p.GetFrom3().Type, or TYPE_NONE when
// p.GetFrom3() returns nil.
func (p *Prog) From3Type() AddrType {
	from3 := p.GetFrom3()
	if from3 == nil {
		return TYPE_NONE
	}
	return from3.Type
}

		} else if p.From3Type() == obj.TYPE_CONST {
			/* imm imm reg reg */
			/* operand order: SIX, VRA, ST, VRT */
			six := int(c.regoff(&p.From))
			st := int(c.regoff(p.GetFrom3()))
			o1 = AOP_IIRR(c.opiirr(p.As), uint32(p.To.Reg), uint32(p.Reg), uint32(st), uint32(six))
		} else if p.From3Type() == obj.TYPE_NONE && p.Reg != 0 {
			/* imm reg reg */

		cond := SpecialOperand(p.From.Offset)
		if cond < SPOP_EQ || cond > SPOP_NV || (cond == SPOP_AL || cond == SPOP_NV) && p.From3Type() == obj.TYPE_NONE {
			c.ctxt.Diag("invalid condition: %v", p)
		} else {
			cond -= SPOP_EQ
		}

		r := int(p.Reg)
		var rf int = r
		if p.From3Type() == obj.TYPE_NONE {
			/* CINC/CINV/CNEG or CSET/CSETM*/
			if r == obj.REG_NONE {
				/* CSET/CSETM */