blob: 4edd715ba24a65e2146170f00608a4c6966a5bc7 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
# Date memoizes some instance methods using metaprogramming to wrap
# the methods with one that caches the result in an instance variable.
#
# If a Date is frozen but the memoized method hasn't been called, the
# first call will result in a frozen object error since the memo
# instance variable is uninitialized.
#
# Work around by eagerly memoizing before freezing.
#
# Ruby 1.9 uses a preinitialized instance variable so it's unaffected.
# This hack is as close as we can get to feature detection:
if RUBY_VERSION < '1.9'
require 'date'
begin
::Date.today.freeze.jd
rescue => frozen_object_error
if frozen_object_error.message =~ /frozen/
class Date #:nodoc:
def freeze
self.class.private_instance_methods(false).each do |m|
if m.to_s =~ /\A__\d+__\Z/
instance_variable_set(:"@#{m}", [send(m)])
end
end
super
end
end
end
end
end
|
