package discovery

// Error is a type used to describe situations that the caller must handle
// since they indicate some form of user error.
//
// The functions and methods that return these specialized errors indicate so
// in their documentation. The Error type should not itself be used directly,
// but rather errors should be compared using the == operator with the
// error constants in this package.
//
// Values of this type are _not_ used when the error being reported is an
// operational error (server unavailable, etc) or indicative of a bug in
// this package or its caller.
type Error string

// ErrorNoSuitableVersion indicates that a suitable version (meeting given
// constraints) is not available.
const ErrorNoSuitableVersion = Error("no suitable version is available")

// ErrorNoVersionCompatible indicates that all of the available versions
// that otherwise met constraints are not compatible with the current
// version of Terraform.
const ErrorNoVersionCompatible = Error("no available version is compatible with this version of Terraform")

// ErrorNoSuchProvider indicates that no provider exists with a name given
const ErrorNoSuchProvider = Error("no provider exists with the given name")

func (err Error) Error() string {
	return string(err)
}