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-rw-r--r--lib/hashie/extensions/mash/define_accessors.rb90
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/hashie/extensions/mash/define_accessors.rb b/lib/hashie/extensions/mash/define_accessors.rb
new file mode 100644
index 0000000..f13ea2e
--- /dev/null
+++ b/lib/hashie/extensions/mash/define_accessors.rb
@@ -0,0 +1,90 @@
+module Hashie
+ module Extensions
+ module Mash
+ module DefineAccessors
+ def self.included(klass)
+ klass.class_eval do
+ mod = Ext.new
+ include mod
+ end
+ end
+
+ def self.extended(obj)
+ included(obj.singleton_class)
+ end
+
+ class Ext < Module
+ def initialize
+ mod = self
+ define_method(:method_missing) do |method_name, *args, &block|
+ key, suffix = method_name_and_suffix(method_name)
+ case suffix
+ when '='.freeze
+ mod.define_writer(key, method_name)
+ when '?'.freeze
+ mod.define_predicate(key, method_name)
+ when '!'.freeze
+ mod.define_initializing_reader(key, method_name)
+ when '_'.freeze
+ mod.define_underbang_reader(key, method_name)
+ else
+ mod.define_reader(key, method_name)
+ end
+ send(method_name, *args, &block)
+ end
+ end
+
+ def define_reader(key, method_name)
+ define_method(method_name) do |&block|
+ if key? method_name
+ self.[](method_name, &block)
+ else
+ self.[](key, &block)
+ end
+ end
+ end
+
+ def define_writer(key, method_name)
+ define_method(method_name) do |value = nil|
+ if key? method_name
+ self.[](method_name, &proc)
+ else
+ assign_property(key, value)
+ end
+ end
+ end
+
+ def define_predicate(key, method_name)
+ define_method(method_name) do
+ if key? method_name
+ self.[](method_name, &proc)
+ else
+ !!self[key]
+ end
+ end
+ end
+
+ def define_initializing_reader(key, method_name)
+ define_method(method_name) do
+ if key? method_name
+ self.[](method_name, &proc)
+ else
+ initializing_reader(key)
+ end
+ end
+ end
+
+ def define_underbang_reader(key, method_name)
+ define_method(method_name) do
+ if key? method_name
+ self.[](key, &proc)
+ else
+ underbang_reader(key)
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+end