Exception: StandardError

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses: ArgumentError, ClosedQueueError, EOFError, EncodingError, FiberError, FloatDomainError, IOError, IndexError, KeyError, LocalJumpError, NameError, NoMethodError, RangeError, RegexpError, RuntimeError, StopIteration, SystemCallError, ThreadError, TypeError, UncaughtThrowError, ZeroDivisionError, Encoding::CompatibilityError, Encoding::ConverterNotFoundError, Encoding::InvalidByteSequenceError, Encoding::UndefinedConversionError, Math::DomainError
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, ::Exception
Instance Chain: self, ::Exception
Inherits:	Exception ::Object Exception StandardError
Defined in:	error.c

Overview

The most standard error types are subclasses of StandardError. A rescue clause without an explicit ::Exception class will rescue all StandardErrors (and only those).

def foo
  raise "Oups"
end
foo rescue "Hello"   #=> "Hello"

On the other hand:

require 'does/not/exist' rescue "Hi"

raises the exception:

LoadError: no such file to load -- does/not/exist

Class Method Summary

::Exception - Inherited

.exception	With no argument, or if the argument is the same as the receiver, return the receiver.
.new	Construct a new ::Exception object, optionally passing in a message.

Instance Method Summary

::Exception - Inherited

#==	Equality—If obj is not an ::Exception, returns `false`.
#backtrace	Returns any backtrace associated with the exception.
#backtrace_locations	Returns any backtrace associated with the exception.
#cause	Returns the previous exception ($!) at the time this exception was raised.
#exception	With no argument, or if the argument is the same as the receiver, return the receiver.
#inspect	Return this exception's class name and message.
#message	Returns the result of invoking `exception.to_s`.
#set_backtrace	Sets the backtrace information associated with `exc`.
#to_s	Returns exception's message (or the name of the exception if no message is set).

Constructor Details

This class inherits a constructor from Exception