f.walk(&n.Key, ctxExpr, visit)
		f.walk(&n.Value, ctxExpr, visit)

	case *ast.ArrayType:
		f.walk(&n.Len, ctxExpr, visit)
		f.walk(&n.Elt, ctxType, visit)
	case *ast.StructType:
		f.walk(n.Fields, ctxField, visit)
	case *ast.FuncType:
		if tparams := funcTypeTypeParams(n); tparams != nil {
			f.walk(tparams, ctxParam, visit)
		}
		f.walk(n.Params, ctxParam, visit)
		if n.Results != nil {