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资源说明：Round of pair programming. We tried writing acl based on YaAcl
Round of pair programming. We tried writing acl based on [YaAcl](https://github.com/mokevnin/ya_acl)
example syntax:
```ruby
acl = Acl.build do
roles do
role :admin
role :another_user
role :editor
role :operator
end
asserts do
assert :first, [:var] do
var
end
assert :another, [:first] do
statuses = [1, 2]
statuses.include? first
end
assert :another2, [:first] do
!!first
end
assert :another3, [:first] do
statuses = [1, 2]
statuses.include? first
end
assert :another4, [:first, :second] do
first == second
end
end
resources :admin do
resource :name, [:editor, :operator] do
privilege :create, :admin do
assert :first, [:admin, :another_user]
end
privilege :update do
assert :another, [:editor]
assert :another2, [:editor, :operator]
assert :another3, [:operator]
assert :another4, [:operator]
end
end
end
end
acl.allow?(:name, :update, [:another_user])
acl.allow?(:name, :update, [:editor], :first => true, :second => false)
acl.allow?(:name, :update, [:editor], :first => false, :second => true)
acl.allow?(:name, :update, [:editor], :first => 1, :second => true)
acl.check!(:name, :create, [:admin], :var => 2)
acl.allow?(:name, :update, [:editor], :first => 3, :second => false)
acl.allow?(:name, :update, [:operator], :first => true, :second => true)
acl.allow?(:name, :update, [:operator], :first => 1, :second => 1)
acl.allow?(:name, :update, [:operator], :first => 3, :second => 3)
```
* acl#allow? will be return true/false
* acl#check will be return instance of object Acl::Result
* acl#check! will be raised if false
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