// An errorDesc describes part of a type-checking error.
type errorDesc struct {
	posn positioner
	msg  string
}

// An error_ represents a type-checking error.
// A new error_ is created with Checker.newError.
// To report an error_, call error_.report.
type error_ struct {
	check *Checker
	desc  []errorDesc
	code  Code
	soft  bool // TODO(gri) eventually determine this from an error code
}

func IsExist(err error) bool {
	return isErrCode(err, ErrCodeKeyExists)
}

// IsUnreachable returns true if and only if err indicates the server could not be reached.
func IsUnreachable(err error) bool {
	return isErrCode(err, ErrCodeUnreachable)
}

// IsConflict returns true if and only if err is a write conflict.
func IsConflict(err error) bool {

 *
 *  05-Sep-2004   Added internal test interface. (JDS)
 */

/** @file
 *  Error handling functions (user interface).
 *  CUnit uses a simple (and conventional) error handling strategy.
 *  Functions that can generate errors set (and usually return) an
 *  error code to indicate the run status.  The error code can be

	"fmt"
	"go/token"
	"io"
	"sort"
)

// In an [ErrorList], an error is represented by an *Error.
// The position Pos, if valid, points to the beginning of
// the offending token, and the error condition is described
// by Msg.
type Error struct {
	Pos token.Position
	Msg string
}

// Error implements the error interface.
func (e Error) Error() string {
	if e.Pos.Filename != "" || e.Pos.IsValid() {

	if err == nil {
		return nil
	}
	return &SyscallError{syscall, err}
}

// IsExist returns a boolean indicating whether the error is known to report
// that a file or directory already exists. It is satisfied by [ErrExist] as
// well as some syscall errors.
//
// This function predates [errors.Is]. It only supports errors returned by
// the os package. New code should use errors.Is(err, fs.ErrExist).

func Errorf(format string, a ...interface{}) error {
	e := fmt.Errorf(format, a...)
	ee := Error{}
	ee.msg = e.Error()
	ee.cause = errors.Unwrap(e)
	return ee
}

// Unwrap the internal error.
func (e Error) Unwrap() error { return e.cause }

// Error 'error' compatible method.
func (e Error) Error() string {
	if e.msg == "" {
		return "crypto: cause <nil>"
	}
	return e.msg
}

var (

	ErrIncorrectSequence = errors.New("out-of-sequence item received")
)

// ErrResponse is a remote error response.
type ErrResponse struct {
	msg string
}

func (e ErrResponse) Error() string {
	return fmt.Sprintf("remote: %s", e.msg)

	// ErrSubQueryRequired sub query required
	ErrSubQueryRequired = errors.New("sub query required")
	// ErrInvalidData unsupported data
	ErrInvalidData = errors.New("unsupported data")
	// ErrUnsupportedDriver unsupported driver
	ErrUnsupportedDriver = errors.New("unsupported driver")
	// ErrRegistered registered
	ErrRegistered = errors.New("registered")

)

// writeSTSErrorResponse writes error headers
func writeSTSErrorResponse(ctx context.Context, w http.ResponseWriter, errCode STSErrorCode, err error) {
	stsErr := stsErrCodes.ToSTSErr(errCode)

	// Generate error response.
	stsErrorResponse := STSErrorResponse{}
	stsErrorResponse.Error.Code = stsErr.Code
	stsErrorResponse.RequestID = w.Header().Get(xhttp.AmzRequestID)
	stsErrorResponse.Error.Message = stsErr.Description
	if err != nil {

		"Unable to decrypt the private key using the provided password",
		"Please set the correct password in environment variable `MINIO_CERT_PASSWD`",
		"",
	)

	ErrUnexpectedError = newErrFn(
		"Unexpected error",
		"Please contact MinIO at https://slack.min.io",
		"",
	)

	ErrInvalidCompressionIncludesValue = newErrFn(
		"Invalid compression include value",
		"Please check the passed value",