Exception: IOError
Relationships & Source Files | |
Extension / Inclusion / Inheritance Descendants | |
Subclasses:
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Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
::StandardError,
::Exception
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Instance Chain:
self,
::StandardError,
::Exception
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Inherits: |
StandardError
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Defined in: | io.c, io.c |
Overview
Raised when an ::IO operation fails.
File.open("/etc/hosts") {|f| f << "example"}
#=> IOError: not opened for writing
File.open("/etc/hosts") {|f| f.close; f.read }
#=> IOError: closed stream
Note that some ::IO failures raise ::SystemCallErrors and these are not subclasses of IOError
:
File.open("does/not/exist")
#=> Errno::ENOENT: No such file or directory - 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 |
#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 |
#set_backtrace | Sets the backtrace information associated with |
#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