0.13.5

• motoko (moc)

  • Breaking change (minor):

    • Add new keyword transient with exactly the same meaning as the old keyword flexible (but a more familiar reading).

    • Add keyword persistent.

      When used to modify the actor keyword in an actor or actor class definition, the keyword declares that the default stability of a
      let or var declaration is stable (not flexible or transient).

      For example, a stateful counter can now be declared as:

      persistent actor {
      
        // counts increments since last upgrade
        transient var invocations = 0;
      
        // counts increments since first installation
        var value = 0; 	// implicitly `stable`
      
        public func inc() : async () {
          value += 1;
          invocations += 1;
        }
      
      }

      On upgrade, the transient variable invocations will be reset to 0 and value, now implicitly stable, will retain its current value.

      Legacy actors and classes declared without the persistent keyword have the same semantics as before.

  • Added new primitive replyDeadline : () -> Nat64 to obtain when a response for a best-effort message is due (#4795).

  • bugfix: fail-fast by limiting subtyping depth to avoid reliance on unpredictable stack overflow (#3057, #4798).

• motoko-base

  • Added Text.fromList and Text.toList functions (dfinity/motoko-base#676).

  • Added Text.fromArray/fromVarArray functions (dfinity/motoko-base#674).

  • Added replyDeadline to ExperimentalInternetComputer (dfinity/motoko-base⁠#677).