Exception: NameError

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses: NoMethodError
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, ::StandardError, ::Exception
Instance Chain: self, ::StandardError, ::Exception
Inherits:	StandardError ::Object Exception StandardError NameError
Defined in:	error.c, error.c

Overview

Raised when a given name is invalid or undefined.

puts foo

raises the exception:

NameError: undefined local variable or method `foo' for main:Object

Since constant names must start with a capital:

Fixnum.const_set :answer, 42

raises the exception:

NameError: wrong constant name answer

.new(msg [, name]) ⇒ name_error constructor

Construct a new NameError exception.

.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.

#name ⇒ String^?

Return the name associated with this NameError exception.

#==	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).

Construct a new NameError exception. If given the name parameter may subsequently be examined using the #name method.

Return the name associated with this NameError exception.