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Versions: 6
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Stored size: 1.51 KB
Contents
class Module
# Create a toggle attribute. This creates two methods for
# each given name. One is a form of tester and the other
# is used to toggle the value.
#
# attr_accessor! :a
#
# is equivalent to
#
# def a?
# @a
# end
#
# def a!(value=true)
# @a = value
# self
# end
#
# CREDIT: Trans
def attr_switch_accessor(*args)
attr_reader!(*args) + attr_writer!(*args)
end
alias_method :attr_toggler, :attr_accessor!
# Create aliases for flag accessors.
#
# CREDIT: Trans
def alias_accessor!(*args)
orig = args.last
args = args - [orig]
args.each do |name|
alias_method("#{name}?", "#{orig}?")
alias_method("#{name}!", "#{orig}!")
end
end
alias_method :alias_switcher, :alias_accessor!
alias_method :alias_toggler, :alias_accessor!
# Create a flaggable attribute. This creates a single methods
# used to set an attribute to "true".
#
# attr_writer! :a
#
# is equivalent to
#
# def a!(value=true)
# @a = value
# self
# end
#
def attr_writer!(*args)
code, made = '', []
args.each do |a|
code << %{
def #{a}!(value=true)
@#{a} = value
self
end
}
made << "#{a}!".to_sym
end
module_eval code
made
end
# Create aliases for flag writer.
#
# CREDIT: Trans
def alias_writer!(*args)
orig = args.last
args = args - [orig]
args.each do |name|
alias_method("#{name}!", "#{orig}!")
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems