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Add support for arrays.
We use this function in the expansion of the `drop-while` command.
This makes working with some functional features much easier. Other packages require this, so it is fine if we do as well.
…ences. We could use `seq-subseq`, but being more explicit allows us to avoid dependencies and having to check types during each iteration of the loop.
This uses more basic features, but the code generation should be split into several functions at this point.
For stack commands, which are handled during the third pass, we should be able to tell if end-tracking is needed.
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Fixed #103.
We require that only accumulation commands can edit the variable. While we do
have generic commands like
reduceandaccumulate, it would still beconvenient to have others.
Possible candidates:
(drop VAR N :at POS)with aliaspop.posdefaults tostart.(drop-while VAR COND)with aliaspop-whiletakefor the opposite ofdroptake-whilefor the opposite ofdrop-whilediffordifferencefor an operation likeseq-differenceFor now, we've decided to have the commands initialize variables and their
preferred positions for optimization.
TODO: Should the
*-whilecommands support expressions, as infind?For example, should
(drop-while VAR EXPR)(as opposed to(drop-while VAR PRED)be equivalent to the following? While the alternative is wordy, is theoperation that common?
(subloop (without VAR) (while EXPR) (drop VAR 1))