// tree returns the containing *Tree.
	// It is unexported so all implementations of Node are in this package.
	tree() *Tree
	// writeTo writes the String output to the builder.
	writeTo(*strings.Builder)
}

// NodeType identifies the type of a parse tree node.
type NodeType int

// Pos represents a byte position in the original input text from which

//
// For example, for each raw cgo source file in the original package,
// such as this one:
//
//	package p
//	import "C"
//	import "fmt"
//	type T int
//	const k = 3
//	var x, y = fmt.Println()
//	func f() { ... }
//	func g() { ... C.malloc(k) ... }
//	func (T) f(int) string { ... }
//
// we synthesize a new ast.File, shown below, that dot-imports the

// Methods attached to a *Named type are also instantiated, and associated with
// a new *Func that has the same position as the original method, but nil function
// scope.
//
// If ctxt is non-nil, it may be used to de-duplicate the instance against
// previous instances with the same identity. As a special case, generic
// *Signature origin types are only considered identical if they are pointer
// equivalent, so that instantiating distinct (but possibly identical)

		}
	}

	switch call.Op() {
	default:
		base.Fatalf("unexpected call op: %v", call.Op())

	case ir.OCALLFUNC:
		call := call.(*ir.CallExpr)

		// If the callee is a named function, link to the original callee.
		if wrapped := ir.StaticCalleeName(call.Fun); wrapped != nil {
			wrapperFn.WrappedFunc = wrapped.Func
		}

		visit(&call.Fun)
		visitList(call.Args)

	case ir.OCALLINTER:

			return p
		}
	}
	return path
}

// trim trims the directory prefix from the path, paying attention
// to the path separator. If they are the same string or the prefix
// is not present the original is returned. The boolean reports whether
// the prefix is present. That path and prefix have slashes for separators.
func trim(path, prefix string) (string, bool) {
	if !strings.HasPrefix(path, prefix) {
		return path, false

			// stop immediately instead of trying more names.
			break
		}
	}
	if err == nil {
		return p, server, nil
	}
	if err, ok := err.(*DNSError); ok {
		// Show original name passed to lookup, not suffixed one.
		// In general we might have tried many suffixes; showing
		// just one is misleading. See also golang.org/issue/6324.
		err.Name = name
	}
	return dnsmessage.Parser{}, "", err

// instantiated types, this is same as the type name of the origin type.
func (t *Named) Obj() *TypeName {
	if t.inst == nil {
		return t.obj
	}
	return t.inst.orig.obj
}

// Origin returns the generic type from which the named type t is
// instantiated. If t is not an instantiated type, the result is t.
func (t *Named) Origin() *Named {
	if t.inst == nil {
		return t
	}
	return t.inst.orig

	if t.peek().typ == itemField {
		chain := t.newChain(t.peek().pos, node)
		for t.peek().typ == itemField {
			chain.Add(t.next().val)
		}
		// Compatibility with original API: If the term is of type NodeField
		// or NodeVariable, just put more fields on the original.
		// Otherwise, keep the Chain node.
		// Obvious parsing errors involving literal values are detected here.

// instantiated types, this is same as the type name of the origin type.
func (t *Named) Obj() *TypeName {
	if t.inst == nil {
		return t.obj
	}
	return t.inst.orig.obj
}

// Origin returns the generic type from which the named type t is
// instantiated. If t is not an instantiated type, the result is t.
func (t *Named) Origin() *Named {
	if t.inst == nil {
		return t
	}
	return t.inst.orig

// along with info on call site scoring and the adjustments made to a
// given score. Here profile is the PGO profile in use (may be
// nil), budgetCallback is a callback that can be invoked to find out
// the original pre-adjustment hairiness limit for the function, and
// inlineHotMaxBudget is the constant of the same name used in the
// inliner. Sample output lines:
//
// Score  Adjustment  Status  Callee  CallerPos ScoreFlags