return n
}

// setPos walks the top structure of x that has no position assigned
// and assigns it all to have position pos.
// When setPos encounters a syntax node with a position assigned,
// setPos does not look inside that node.
// setPos only needs to handle syntax we create in this package;
// all other syntax should have positions assigned already.
func setPos(x syntax.Node, pos syntax.Pos) {
	if x == nil {

				}
				if len(nl)-i > 1 {
					goto toomany
				}
				n = nl[i]
				ir.SetPos(n)
				if n.Type() != nil {
					nl[i] = assignconvfn(n, t, desc)
				}
				return
			}

			// TODO(mdempsky): Make into ... call with implicit slice.
			for ; i < len(nl); i++ {
				n = nl[i]
				ir.SetPos(n)
				if n.Type() != nil {
					nl[i] = assignconvfn(n, t.Elem(), desc)
				}
			}

func tcCompLit(n *ir.CompLitExpr) (res ir.Node) {
	if base.EnableTrace && base.Flag.LowerT {
		defer tracePrint("tcCompLit", n)(&res)
	}

	lno := base.Pos
	defer func() {
		base.Pos = lno
	}()

	ir.SetPos(n)

	t := n.Type()
	base.AssertfAt(t != nil, n.Pos(), "missing type in composite literal")

	switch t.Kind() {
	default:
		base.Errorf("invalid composite literal type %v", t)
		n.SetType(nil)

		return true // discard
	}

	// Only worry about simple "l = r" assignments. The OAS2*
	// assignments mostly necessitate dynamic execution anyway.
	if len(lhs) > 1 {
		return false
	}

	lno := ir.SetPos(n)
	defer func() { base.Pos = lno }()

	nam := lhs[0].(*ir.Name)
	return s.StaticAssign(nam, 0, rhs, nam.Type())
}

// like staticassign but we are copying an already
// initialized value r.

		body.Append(ncase.Body...)
		if fall, pos := endsInFallthrough(ncase.Body); !fall {
			br := ir.NewBranchStmt(base.Pos, ir.OBREAK, nil)
			br.SetPos(pos)
			body.Append(br)
		}
	}
	sw.Cases = nil

	if defaultGoto == nil {
		br := ir.NewBranchStmt(base.Pos, ir.OBREAK, nil)
		br.SetPos(br.Pos().WithNotStmt())
		defaultGoto = br
	}

	s.Emit(&sw.Compiled)
	sw.Compiled.Append(defaultGoto)

func NewIdentifier(ident string) *IdentifierNode {
	return &IdentifierNode{NodeType: NodeIdentifier, Ident: ident}
}

// SetPos sets the position. [NewIdentifier] is a public method so we can't modify its signature.
// Chained for convenience.
// TODO: fix one day?
func (i *IdentifierNode) SetPos(pos Pos) *IdentifierNode {
	i.Pos = pos
	return i
}

// described in the comment at the top of the file.
func order(fn *ir.Func) {
	if base.Flag.W > 1 {
		s := fmt.Sprintf("\nbefore order %v", fn.Sym())
		ir.DumpList(s, fn.Body)
	}
	ir.SetPos(fn) // Set reasonable position for instrumenting code. See issue 53688.
	orderBlock(&fn.Body, map[string][]*ir.Name{})
}

// append typechecks stmt and appends it to out.
func (o *orderState) append(stmt ir.Node) {

	if err != nil {
		ptestErr = &PackageError{
			ImportStack: stk.Copy(),
			Err:         err,
		}
		incomplete = true
		embedErr := err.(*EmbedError)
		ptestErr.setPos(p.Internal.Build.TestEmbedPatternPos[embedErr.Pattern])
	}
	stk.Pop()

	stk.Push(p.ImportPath + "_test")
	pxtestNeedsPtest := false
	var pxtestIncomplete bool
	rawXTestImports := str.StringList(p.XTestImports)

	case itemIdentifier:
		checkFunc := t.Mode&SkipFuncCheck == 0
		if checkFunc && !t.hasFunction(token.val) {
			t.errorf("function %q not defined", token.val)
		}
		return NewIdentifier(token.val).SetTree(t).SetPos(token.pos)
	case itemDot:
		return t.newDot(token.pos)
	case itemNil:
		return t.newNil(token.pos)
	case itemVariable:
		return t.useVar(token.pos, token.val)
	case itemField:

		// and would lose the init list.
		base.Fatalf("walkExpr init == &n->ninit")
	}

	if len(n.Init()) != 0 {
		walkStmtList(n.Init())
		init.Append(ir.TakeInit(n)...)
	}

	lno := ir.SetPos(n)

	if base.Flag.LowerW > 1 {
		ir.Dump("before walk expr", n)
	}

	if n.Typecheck() != 1 {
		base.Fatalf("missed typecheck: %+v", n)
	}

	if n.Type().IsUntyped() {