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Exception

The ancester of the all exceptions.

SuperClass:

Object

Class Methods:

exception([error_message = ""])

new([error_message = ""])

Creates a new exception object. The error_message string can be supplied as the optional argument. The default exception handler at top leve, will show this error_message.

exception is used internally by raise.

Methods:

backtrace

Returns backtrace information as the array of the strings in the following format.

"#{sourcefile}:#{sourceline}:in `#{method}'"

(within methods)

"#{sourcefile}:#{sourceline}"

(at top level)

exception

Return self. This method is used internally by raise.

message

to_s

to_str

Returns the error message string.

set_backtrace(errinfo)

Sets the backtrace information of the exception. errinfo must be the array of the strings.

Interrupt

The exception for the untrapped SIGINT.

SuperClass:

Exception

NotImplementError

The exception raised when unimplemented feature was invoked.

SuperClass:

Exception

SignalException

The exception raised by the signals (except SIGINT).

SuperClass:

Exception

StandardError

The rescue class without class specifified will catch the subclasses of this exception class.

SuperClass:

Exception

SystemExit

Raised by exit to terminate the interpreter.

SuperClass:

Exception

fatal

The fatal error, which can not be caught nor handled.
e.g.:

• No more memory available
• Thread dead-lock happened
• Could not move to the directory specified by options -x and -X.
• Could not perform inplace edit by some reasons

SuperClass:

Exception

ArgumentError

The exception raised when some problem found with methods arguments. E.g.

Math.sqrt(-1)

SuperClass:

StandardError

FloatDomainError

Raised by the floating point number operation with infinite number or NaN.

SuperClass:

StandardError

IndexError

Raised when index out of range.

SuperClass:

StandardError

IOError

Raised when I/O error happened.

SuperClass:

StandardError

LoadError

Raised when load or require failed.

SuperClass:

StandardError

LocalJumpError

raised by local jumps (return, break, next, redo, retry) from a Proc object which is brought out of its original scope.

SuperClass:

StandardError

NameError

Raised by accessing an undefined identifier.

SuperClass:

StandardError

RuntimeError

The default exception caused by raise without specifying an exception.

SuperClass:

StandardError

SecurityError

Raised by security problem with tainted data.

SuperClass:

StandardError

SyntaxError

Raised by a syntax error.

SuperClass:

StandardError

SystemCallError

The exceptions for system call failures.
This is the abstract super class for the actual system call exception classes, which are defined under the Errno module.

SuperClass:

StandardError

Methods:

errno

Returns the errno passed from the OS.

SystemStackError

Raised when stack level becomes too deep.

SuperClass:

StandardError

TypeError

Raised by the type problem. Mostly caused by C extensions.

SuperClass:

StandardError

ThreadError

Raised by the follwing Threaderrors:

• try to join the current thread.
• join causes dead lock.
• try to wakeup the dead thread.
• try to stop a sole thread.
• try to create a thread without the block.
• global jump out of thread by throw happened.
• exit from the thread block by return.

SuperClass:

StandardError

ZeroDivisionError

Raised by a division by zero.

SuperClass:

StandardError

EOFError

Raised when EOF is reached.

SuperClass:

IOError

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matz@netlab.co.jp

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