Sha256: a61adc911295d9cd46c459a98f22ceaf7d5f5bf3682a39e3e8dc32a92888bd7f
Contents?: true
Size: 865 Bytes
Versions: 9
Compression:
Stored size: 865 Bytes
Contents
class AttrExtras::AttrImplement
def initialize(klass, names)
@klass, @names = klass, names.dup
end
def apply
arg_names = @names.last.is_a?(Array) ? @names.pop : []
expected_arity = arg_names.length
# Make available within the block.
names = @names
mod = Module.new do
define_method :method_missing do |name, *args|
if names.include?(name)
provided_arity = args.length
if provided_arity != expected_arity
raise ArgumentError, "wrong number of arguments (#{provided_arity} for #{expected_arity})"
end
raise AttrExtras::MethodNotImplementedError, "Implement a '#{name}(#{arg_names.join(", ")})' method"
else
super(name, *args)
end
end
end
# include is private in Ruby 2.0 and earlier.
@klass.send(:include, mod)
end
end
Version data entries
9 entries across 9 versions & 1 rubygems