lib/signalize.rb in signalize-1.1.0 vs lib/signalize.rb in signalize-1.2.0

@@ -19,10 +19,14 @@
 
   def self.cycle_detected
 	  raise Signalize::Error, "Cycle detected"
   end
 
+  def self.mutation_detected
+	  raise Signalize::Error, "Computed cannot have side-effects"
+  end
+
   RUNNING = 1 << 0
   NOTIFIED = 1 << 1
   OUTDATED = 1 << 2
   DISPOSED = 1 << 3
   HAS_ERROR = 1 << 4
@@ -32,10 +36,14 @@
 
   # Computed | Effect | nil
   global_map_accessor :eval_context
   self.eval_context = nil
 
+  # Used by `untracked` method
+  global_map_accessor :untracked_depth
+  self.untracked_depth = 0
+
   # Effects collected into a batch.
   global_map_accessor :batched_effect
   self.batched_effect = nil
   global_map_accessor :batch_depth
   self.batch_depth = 0
@@ -412,10 +420,12 @@
       node._version = _version unless node.nil?
       @value
     end
 
     def value=(value)
+      Signalize.mutation_detected if Signalize.eval_context.is_a?(Signalize::Computed)
+
       if value != @value
         Signalize.cycle_detected if Signalize.batch_iteration > 100
 
         @value = value;
         @_version += 1
@@ -482,11 +492,11 @@
       if @_version > 0 && !Signalize.needs_to_recompute(self)
         @_flags &= ~RUNNING
         return true
       end
     
-      prevContext = Signalize.eval_context
+      prev_context = Signalize.eval_context
       begin
         Signalize.prepare_sources(self)
         Signalize.eval_context = self
         value = @_compute.()
         if (@_flags & HAS_ERROR).nonzero? || @value != value || @_version == 0
@@ -497,11 +507,11 @@
       rescue StandardError => err
         @value = err;
         @_flags |= HAS_ERROR
         @_version += 1
       end
-      Signalize.eval_context = prevContext
+      Signalize.eval_context = prev_context
       Signalize.cleanup_sources(self)
       @_flags &= ~RUNNING
 
       true
     end
@@ -663,9 +673,24 @@
 
       begin
         return yield
       ensure
         Signalize.end_batch
+      end
+    end
+
+    def untracked
+      return yield unless Signalize.untracked_depth.zero?
+
+      prev_context = Signalize.eval_context
+      Signalize.eval_context = nil
+      Signalize.untracked_depth += 1
+
+      begin
+        return yield
+      ensure
+        Signalize.untracked_depth -= 1
+        Signalize.eval_context = prev_context
       end
     end
   end
 
   extend API