Sha256: b9b2767925b4f6968ce417e3e9fe3b5cae98bf3d6a37527d354d6be4294b9ba0
Contents?: true
Size: 1.8 KB
Versions: 13
Compression:
Stored size: 1.8 KB
Contents
class EcoRake
module Default
module Const
class << self
def included(base)
super(base)
base.extend EcoRake::Base::SymbolResolver
base.extend ClassMethods
end
end
module ClassMethods
# Creates (overridable) method(s) that link to an expected constant with same name (in capitals).
# @note this creates one method on the class and one on instances thereof.
# @param required [Boolean] whether an exception should be raised if the constant does not exist
# when the created method is called.
# @param override [Boolean] whether an exception should NOT be raised if the method exists.
# @param default [Variant] whether if this defaults to some value (won't raise NameError).
def attr_const(*attrs, required: false, override: false, default: :not_used)
attrs.each do |attr|
attr = attr.to_s.freeze
unless override
msg = "#{__method__} does not allow method override. Offending attr: #{attr}"
raise ArgumentError, "#{msg} (class method)" if methods.include?(attr)
raise ArgumentError, "#{msg} (instance method)" if instance_methods.include?(attr)
end
define_singleton_method attr do
msg = "Missing const '#{attr.to_s.upcase}' in #{self}"
value = resolve_const(attr)
value = default if value.nil? && default != :not_used
raise NameError, msg if value.nil? && required
yield(value) if block_given?
value
end
define_method attr do |&block|
self.class.send(attr, &block)
end
end
end
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems