Interpreter

Syntax Experiments

One way I’ve been working on Klee, is to sketch out example programs and explain how they should behave, before the implementation can sufficiently execute the commands I’m drawing out.

During

The during keyword is used in proper syndicate implementations, and plays the same roll in Klee. It takes the default form:

(during P <E_b> <E> <E_r>)

• P is the pattern we are matching the dataspace against

• E_b denotes “expression before” and is the expression run for a defined amount of time “before” the assertion appears. The idea here is to have three dedicated lifetimes of a shape “before” “during” and “after”. Because we cannot predict the future, before instead needs to start when the assertion is first asserted, and as mentioned previously, lives for a defined amount of time in this state. One major use case for this is fade-in animations.