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:

Integer.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.

#local_variables ⇒ Array

Return a list of the local variable names defined where this NameError exception was raised.
#name ⇒ String^?

Return the name associated with this NameError exception.
#receiver ⇒ Object

Return the receiver 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 a list of the local variable names defined where this NameError exception was raised.

Internal use only.

Return the name associated with this NameError exception.

Return the receiver associated with this NameError exception.