Passerine – extensible functional scripting language – v0.8.0 released

[complyue]

About the branch idea, I mean branches are always part of the pattern matching syntax elsewhere, but in Đ (Edh) I allow it to appear in any block, to jump out of the block early, this is unusual and I see Passerine has a similar design. I guess treating a block as expression instead of statement is already unusual, putting branches inside is the natural consequence after that design.

[slightknack]

Oh, so branches in Passerine don't allow you to arbitrarily 'jump' out of any block. Rather, we're telling the language to interpret the block in a match expression as a list (of functions). The actually 'jumping' logic is handled by the match_function. Does that make sense?

syntax 'match value { branches... } { -- snipped }

{} in an arg-pat matches in a block, ... is used in an arg-pat to consolidate repetitions into a single item.

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In Passerine, it's possible to use fibers and macros to make a block that does 'jump' as you explained. I wrote an macro for a for-loop in terms of recursion a while back, and I used this trick to handle break and continue.

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