package errors

import stdErrors "errors"

// IsAppError reports whether err is an *AppError or wraps one anywhere in its
// chain. It uses errors.As under the hood, so wrapped causes are detected too.
func IsAppError(err error) bool {
	var target *AppError
	return stdErrors.As(err, &target)
}

// As extracts the first *AppError in err's chain, reporting whether one was
// found. It mirrors errors.As but returns the typed error directly for
// convenience. The returned error is the outermost AppError in the chain.
func As(err error) (*AppError, bool) {
	var target *AppError
	ok := stdErrors.As(err, &target)
	return target, ok
}