func NewTypeParam(obj *TypeName, constraint Type) *TypeParam {
	return (*Checker)(nil).newTypeParam(obj, constraint)
}

// check may be nil
func (check *Checker) newTypeParam(obj *TypeName, constraint Type) *TypeParam {
	// Always increment lastID, even if it is not used.
	id := nextID()
	if check != nil {
		check.nextID++
		id = check.nextID
	}
	typ := &TypeParam{check: check, id: id, obj: obj, index: -1, bound: constraint}

func NewTypeParam(obj *TypeName, constraint Type) *TypeParam {
	return (*Checker)(nil).newTypeParam(obj, constraint)
}

// check may be nil
func (check *Checker) newTypeParam(obj *TypeName, constraint Type) *TypeParam {
	// Always increment lastID, even if it is not used.
	id := nextID()
	if check != nil {
		check.nextID++
		id = check.nextID
	}
	typ := &TypeParam{check: check, id: id, obj: obj, index: -1, bound: constraint}

Austin Clements <******@****.***> 1683224724 -0400

  Status status;
  RuntimeBuilder runtime_builder;
  std::unique_ptr<Runtime> runtime = runtime_builder.Build(&status);
  ASSERT_TRUE(status.ok()) << status.message();

  TF_DataType dtype = TypeParam::kDType;
  typename TypeParam::type value = 42;
  Tensor original_tensor =
      Tensor::FromBuffer(/*dtype=*/dtype, /*shape=*/{},
                         /*data=*/&value,
                         /*len=*/sizeof(value),

      /*data=*/value.data(),
      /*len=*/value.size() * sizeof(typename TypeParam::type),
      /*deleter=*/[](void*, size_t) {}, &status);
  ASSERT_TRUE(status.ok()) << status.message();

  EXPECT_EQ(tensor.dims(), 1);
  EXPECT_EQ(tensor.dtype(), dtype);
  absl::Span<const typename TypeParam::type> tensor_view(
      reinterpret_cast<typename TypeParam::type*>(tensor.data()), value.size());
  EXPECT_EQ(tensor_view[0], 42);

	// suffixes should be unique within a package.
	FuncSuffix string

	// DataType is the type of the data parameter of functions in this variant's
	// code.
	DataType string

	// TypeParam is the optional type parameter for the function.
	TypeParam string

	// ExtraParam is an extra parameter to pass to the function. Should begin with
	// ", " to separate from other params.
	ExtraParam string

type TypeParamList struct{ tparams []*TypeParam }

// Len returns the number of type parameters in the list.
// It is safe to call on a nil receiver.
func (l *TypeParamList) Len() int { return len(l.list()) }

// At returns the i'th type parameter in the list.
func (l *TypeParamList) At(i int) *TypeParam { return l.tparams[i] }

// list is for internal use where we expect a []*TypeParam.

type TypeParamList struct{ tparams []*TypeParam }

// Len returns the number of type parameters in the list.
// It is safe to call on a nil receiver.
func (l *TypeParamList) Len() int { return len(l.list()) }

// At returns the i'th type parameter in the list.
func (l *TypeParamList) At(i int) *TypeParam { return l.tparams[i] }

// list is for internal use where we expect a []*TypeParam.

type monoGraph struct {
	vertices []monoVertex
	edges    []monoEdge

	// canon maps method receiver type parameters to their respective
	// receiver type's type parameters.
	canon map[*TypeParam]*TypeParam

	// nameIdx maps a defined type or (canonical) type parameter to its
	// vertex index.
	nameIdx map[*TypeName]int
}

type monoVertex struct {
	weight int // weight of heaviest known path to this vertex

pkg go/types, method (*TypeList) Len() int
pkg go/types, method (*TypeParam) Constraint() Type
pkg go/types, method (*TypeParam) Index() int
pkg go/types, method (*TypeParam) Obj() *TypeName
pkg go/types, method (*TypeParam) SetConstraint(Type)
pkg go/types, method (*TypeParam) String() string
pkg go/types, method (*TypeParam) Underlying() Type
pkg go/types, method (*TypeParamList) At(int) *TypeParam
pkg go/types, method (*TypeParamList) Len() int