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author | Jeremy Kemper <jeremy@bitsweat.net> | 2007-09-24 23:00:42 +0000 |
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committer | Jeremy Kemper <jeremy@bitsweat.net> | 2007-09-24 23:00:42 +0000 |
commit | 8e78a4542e80a2d8d593547ecf8021b0e2902a0d (patch) | |
tree | 2a67622da0f95e8465c95c29b5cdb22d91e467eb /activesupport/lib/active_support | |
parent | eca3b790b5aaa92cc563dfed095feffda150c09e (diff) | |
download | rails-8e78a4542e80a2d8d593547ecf8021b0e2902a0d.tar.gz rails-8e78a4542e80a2d8d593547ecf8021b0e2902a0d.tar.bz2 rails-8e78a4542e80a2d8d593547ecf8021b0e2902a0d.zip |
Object#instance_exec produces fewer garbage methods.
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7621 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'activesupport/lib/active_support')
-rw-r--r-- | activesupport/lib/active_support/core_ext/object/extending.rb | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/extending.rb b/activesupport/lib/active_support/core_ext/object/extending.rb index 7c79d73f21..19f42cabce 100644 --- a/activesupport/lib/active_support/core_ext/object/extending.rb +++ b/activesupport/lib/active_support/core_ext/object/extending.rb @@ -42,10 +42,31 @@ class Object values end end - + unless defined? instance_exec # 1.9 - def instance_exec(*arguments, &block) #:nodoc: - block.bind(self)[*arguments] + module InstanceExecMethods #:nodoc: + end + include InstanceExecMethods + + # Evaluate the block with the given arguments within the context of + # this object, so self is set to the method receiver. + # + # From Mauricio's http://eigenclass.org/hiki/bounded+space+instance_exec + def instance_exec(*args, &block) + begin + old_critical, Thread.critical = Thread.critical, true + n = 0 + n += 1 while respond_to?(method_name = "__instance_exec#{n}") + InstanceExecMethods.module_eval { define_method(method_name, &block) } + ensure + Thread.critical = old_critical + end + + begin + send(method_name, *args) + ensure + InstanceExecMethods.module_eval { remove_method(method_name) } rescue nil + end end end end |