orig    *Alias         // original, uninstantiated alias
	tparams *TypeParamList // type parameters, or nil
	targs   *TypeList      // type arguments, or nil
	fromRHS Type           // RHS of type alias declaration; may be an alias
	actual  Type           // actual (aliased) type; never an alias
}

// NewAlias creates a new Alias type with the given type name and rhs.
// rhs must not be nil.
func NewAlias(obj *TypeName, rhs Type) *Alias {

		os.Setenv("CC", compilerEnvLookup("CC", defaultcc, gohostos, gohostarch))
		goCmd(nil, gorootBinGo, "build", "-o", pathf("%s/go_%s_%s_exec%s", gorootBin, goos, goarch, exe), wrapperPath)
		// Restore environment.
		// TODO(elias.naur): support environment variables in goCmd?
		os.Setenv("GOOS", goos)
		os.Setenv("GOARCH", goarch)
		os.Setenv("CC", oldcc)
	}

	if distpack {

! stderr 'Alias'

-- go.mod --
module example.com
go 1.12

-- a.go --
package a

/*
typedef int T;
*/
import "C"

func (C.T) f() {}
func (recv *C.T) g() {}

// The check is more education than enforcement,
// and is easily defeated using a type alias.
type Alias = C.T
func (Alias) h() {}

		for _, obj := range objList {
			check.objDecl(obj, nil)
		}
	} else {
		// Without Alias nodes, we process non-alias type declarations first, followed by
		// alias declarations, and then everything else. This appears to avoid most situations
		// where the type of an alias is needed before it is available.
		// There may still be cases where this is not good enough (see also go.dev/issue/25838).

// TODO(gri) should we include signatures or assert that they are not present?
func isGeneric(t Type) bool {
	// A parameterized type is only generic if it doesn't have an instantiation already.
	if alias, _ := t.(*Alias); alias != nil && alias.tparams != nil && alias.targs == nil {
		return true
	}
	named := asNamed(t)
	return named != nil && named.obj != nil && named.inst == nil && named.TypeParams().Len() > 0
}

	for _, flag := range analysisFlags {
		if rEnable.MatchString(flag.Usage) {
			analyzerSet[flag.Name] = true
		}
	}

	rDeprecated := regexp.MustCompile("^deprecated alias for -(?P<analyzer>(.+))$")
	// Returns the original value matched by rDeprecated on input value.
	// If there is no match, "" is returned.
	originalValue := func(value string) string {

	Type
	TypeParams() *TypeParamList
}

// Instantiate instantiates the type orig with the given type arguments targs.
// orig must be an *Alias, *Named, or *Signature type. If there is no error,
// the resulting Type is an instantiated type of the same kind (*Alias, *Named
// or *Signature, respectively).
//
// Methods attached to a *Named type are also instantiated, and associated with

// so we could depend on it from other packages without
// introducing an import cycle.)
type Type interface {
	// Underlying returns the underlying type of a type.
	// Underlying types are never Named, TypeParam, or Alias types.
	//
	// See https://go.dev/ref/spec#Underlying_types.
	Underlying() Type

	// String returns a string representation of a type.
	String() string
}

			x.val = obj.val
		}
		assert(x.val != nil)
		x.mode = constant_

	case *TypeName:
		if !check.conf.EnableAlias && check.isBrokenAlias(obj) {
			check.errorf(e, InvalidDeclCycle, "invalid use of type alias %s in recursive type (see go.dev/issue/50729)", obj.name)
			return
		}
		x.mode = typexpr

	case *Var:
		// It's ok to mark non-local variables, but ignore variables

				oldidx := uint32(pass.ID)
				po.constants[val] = oldidx
			}

		case undoAliasNode:
			ID, prev := pass.ID, pass.idx
			cur := po.values[ID]
			if prev == 0 {
				// Born as an alias, die as an alias
				delete(po.values, ID)
			} else {
				if cur == prev {
					panic("invalid aliasnode undo pass")
				}
				// Give it back previous value
				po.values[ID] = prev
			}