Ambient-Oriented Programming

User Tools

Site Tools

Trace:
at:tutorial:actors

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revisionBoth sides next revision
at:tutorial:actors [2020/02/05 21:23] – elisagat:tutorial:actors [2020/02/05 21:24] – elisag
Line 192: Line 192:
 def sum := calculator<-add(1,2); def sum := calculator<-add(1,2);
 </code> </code>
 +
  
  
 ==== Enabling futures ==== ==== Enabling futures ====
 +
 +In AmbientTalk, futures are not native to the language. However, because of AmbientTalk's reflective infrastructure, it is possible to build futures on top of the language. The system library shipped with AmbientTalk contains exactly this: a reflective implementation that adds futures to the language kernel. This implementation can be found in the file ''at/lang/futures.at''.
  
 To enable futures, it suffices to import the futures module and to enable it, as follows: To enable futures, it suffices to import the futures module and to enable it, as follows:
Line 204: Line 207:
  
 The first statement imports the futures module into the current lexical scope. This enables you as a developer to use some additional language constructs exported by the futures module, as will be explained later. The second statement enables the futures behaviour, causing any asynchronous message send to return a future rather than ''nil''. If ''false'' is passed to the call to ''enableFutures'', only messages annotated explicitly as ''@FutureMessage'' (or as ''@TwoWay'') will return a future. The first statement imports the futures module into the current lexical scope. This enables you as a developer to use some additional language constructs exported by the futures module, as will be explained later. The second statement enables the futures behaviour, causing any asynchronous message send to return a future rather than ''nil''. If ''false'' is passed to the call to ''enableFutures'', only messages annotated explicitly as ''@FutureMessage'' (or as ''@TwoWay'') will return a future.
 +
 +<note important>
 +In what follows we provide an overview on how to work with futures. More information pertaining to the API of the futures language module can be found in the [[:at:tutorial:appendix#futures_and_multifutures|appendix]].
 +</note>
  
 ==== Working with Unresolved Futures ==== ==== Working with Unresolved Futures ====
at/tutorial/actors.txt · Last modified: 2020/02/05 21:26 by elisag