Module: Hibiki::Reactive::ClassMethods

Defined in:
lib/hibiki/reactive.rb

Instance Method Summary collapse

Instance Method Details

#derived(name) ⇒ Object 



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# File 'lib/hibiki/reactive.rb', line 45

def derived(name, &)
  init = proc { Derived.new { instance_exec(&) } }
  define_method(name) { __hibiki_signal(name, init).value }
end

#effect(&block) ⇒ Object

Anonymous, so unlike state/derived it can't ride on method inheritance: blocks are collected per class and gathered up the ancestor chain at initialize.



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# File 'lib/hibiki/reactive.rb', line 53

def effect(&block) = hibiki_effect_blocks << block

#hibiki_effect_blocks ⇒ Object 



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# File 'lib/hibiki/reactive.rb', line 55

def hibiki_effect_blocks = (@hibiki_effect_blocks ||= [])

#state(name, default = nil, &default_block) ⇒ Object

state :count, 0 state(:items) { [] } A positional default is shared across instances (it's one object) — use the block form for mutable defaults. The block is evaluated per instance, instance_exec'd, and untracked: first touch may happen inside some effect's tracking window, and a default that reads other signals must not subscribe that outer observer.



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# File 'lib/hibiki/reactive.rb', line 37

def state(name, default = nil, &default_block)
  init = proc do
    State.new(default_block ? Hibiki.untrack { instance_exec(&default_block) } : default)
  end
  define_method(name) { __hibiki_signal(name, init).value }
  define_method(:"#{name}=") { |new_value| __hibiki_signal(name, init).value = new_value }
end