specs2-common/org.specs2.control/Exceptions

Exceptions

trait Exceptions

This trait provides methods to catch exceptions and transform them into values which can be passed to further computations.

It uses the facilities found in the scala.util.control.Exception object while providing a more concise api on some use cases.

See also:

org.specs2.control.ExceptionsSpec for examples

Companion:
object
class Object
trait Matchable
class Any
object Exceptions.type

Value members

Concrete methods

def catchAll[T, S](a: => T)(f: Throwable => S): Either[S, T]

try to evaluate an expression, returning Either

try to evaluate an expression, returning Either

If the expression throws any Throwable a function f is used to return the left value of the Either returned value.

def catchAllOr[T](a: => T)(f: Throwable => T): T

try to evaluate an expression, returning a value T

try to evaluate an expression, returning a value T

If the expression throws a Throwable a function f is used to return a value of the expected type.

def catchAllOrElse[T](a: => T)(ko: => T): T

try to evaluate an expression, returning a value T

try to evaluate an expression, returning a value T

If the expression throws a Throwable, then return a default value

def catchAll_Either[T, S](a: => T)(f: Throwable => S): Either[S, T]

try to evaluate an expression, returning Either

try to evaluate an expression, returning Either

If the expression throws an Exception a function f is used to return the left value of the Either returned value.

def tryCollect[T](a: => T)(partialFunction: PartialFunction[T, Boolean]): Boolean

try to apply a partial function to a value

try to apply a partial function to a value

def tryCollectOr[T, S](a: => T, or: S)(partialFunction: PartialFunction[T, S]): S

try to apply a partial function to a value, with a default value if something goes wrong

try to apply a partial function to a value, with a default value if something goes wrong

def tryMap[T, S](a: => T)(ok: S)(ko: S): S

try to evaluate an expression and return ok if nothing fails. return ko otherwise

try to evaluate an expression and return ok if nothing fails. return ko otherwise

def tryOk[T](a: => T): Boolean

try to evaluate an expression and return true if nothing fails. return false otherwise

try to evaluate an expression and return true if nothing fails. return false otherwise

def tryOr[T](a: => T)(f: Throwable => T): T

try to evaluate an expression, returning a value T

try to evaluate an expression, returning a value T

If the expression throws an Exception a function f is used to return a value of the expected type.

def tryOrElse[T](a: => T)(ko: T): T

try to evaluate an expression and return it if nothing fails. return ko otherwise

try to evaluate an expression and return it if nothing fails. return ko otherwise

def tryOrNone[T](a: => T): Option[T]

try to evaluate an expression and return it in an Option if nothing fails. return None otherwise

try to evaluate an expression and return it in an Option if nothing fails. return None otherwise

def try_Either[T, S](a: => T)(f: Throwable => S): Either[S, T]

try to evaluate an expression, returning Either

try to evaluate an expression, returning Either

If the expression throws an Exception a function f is used to return the left value of the Either returned value.

def trye[T, S](a: => T)(f: Throwable => S): Either[S, T]

try to evaluate an expression, returning Either

try to evaluate an expression, returning Either

If the expression throws an Exception a function f is used to return the left value of the Either returned value.

def tryo[T](a: => T): Option[T]

try to evaluate an expression, returning an Option

try to evaluate an expression, returning an Option

The 'tryo' name comes from the lift project: http://liftweb.net

Returns:

None if there is an exception, or Some(value)