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1942 lines
62 KiB
Plaintext
1942 lines
62 KiB
Plaintext
/- *plum, *xray
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::
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:: # Type Analysis
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::
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:: This does analysis on types to produce an `ximage` value, which can
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:: be used to print the type (with `ximage-to-spec`) or to print values
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:: of that type (using the `libpprint` library). You should understand
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:: the `ximage` type before digging further.
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::
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:: `xray-type` is the main gate of interest here. It's implemented as a
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:: series of passes:
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::
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:: - `analyze-type`: This takes a `type`, which is a lazily-evaluated,
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:: recursive xdat structure, and converts it into an explicit
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:: graph. It also collect the information from `%hint` types and
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:: decorates the graph nodes with that.
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::
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:: - `cleanup`: Removes `%pntr` nodes, replacing references to them
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:: with references to what they resolve to.
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::
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:: - `decorate-ximage-with-loops`: Determines which nodes reference
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:: themselves recursively.
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::
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:: - `decorate-ximage-with-xpats`: Adds printing heuristics to types:
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:: "Should this be printed as a list?"
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::
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:: - `decorate-ximage-with-xshapes`: Determines the loose shape of each
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:: type. This overlaps with, and is used by, the next pass. Doing
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:: this as a separate pass removes a lot of difficult edge-cases when
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:: determining the `xrole` of cell-types.
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::
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:: - `decorate-ximage-with-xroles`: Restructures forks to make them
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:: coherent. This is important both for printing types (we want to use
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:: `$@` `$%` `$%`, etc) and for printing xdat (we need an efficient
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:: way to determine which branch of a fork matches a value.
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::
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:: # Todos
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::
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:: - XX It seems (have'nt verified this) that there's a lot of things
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:: that are forks that, once void types have been factored out,
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:: only actually refer to one thing. It would be nice to discover
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:: things of this kind and replace such fork node with the thing the
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:: actualy resolve to.
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::
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:: The reason I think this is what's happening is that I see lots
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:: of %unexpected-fork-xrole messages when converting the kernel type
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:: to a spec, and those xroles have things like %tall and %atom.
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:: However! The `combine` function never produces anything with
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:: those xroles.
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::
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:: - XX Create xpats and matchers %map %set.
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::
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:: - XX Create xpats and matchers for tuples. There's no need to
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:: recreate this structure in the printing code, and that's what we're
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:: doing now.
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::
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:: - XX The xpat of an xray could be computed on demand instead of
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:: up-front. Possibly a lot faster!
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::
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:: - XX The loop-detection of an xray could be done on demand instead
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:: of up-front. Possibly a lot faster!
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::
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:: - XX The xpat matching code is basically brute-force.
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::
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:: If it turns out to be a performance bottleneck, there's lots of
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:: low-hanging fruit there. For example:
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::
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:: - Faces repeat the work done for the type they reference.
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:: - When detecting whether a cell is part of an "informal" list,
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:: we recurse into the tail repeatedly. For example, the following
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:: example will do the "formal-list" test 3 times:
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::
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:: - `[1 2 `(list @)`~]`
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::
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:: - XX Try to find a way to drop the `%pntr` constructor from
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:: `%xdat`. The consumer of an `xray` does not care.
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::
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:: - XX Actually, it would also be really nice to produce another
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:: version of this structure that doesn't have the (unit *) wrapper around
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:: everything interesting. This would make the on-demand computation
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:: of various things hard, though.
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::
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:: - XX Simply lying about the type of deep arms is not robust. I am just
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:: claiming that they are nouns, but if another thing in the xray
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:: actually needs it, it will think it's a noun too.
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::
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:: - XX There are probably remaining bugs. Test the shit out of this.
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::
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:: - XX What should the `xrole` of a cell with a %noun head be? I
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:: think the current design can't handle this case coherently.
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::
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|^ ^- $: ximage-to-spec=$-(=ximage =spec)
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xray-type=$-([@ type] ximage)
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focus-on=$-([xtable xkey] xray)
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==
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[ximage-to-spec xray-type focus-on]
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::
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+| %helpers
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::
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++ batt-of |$ [arm] (map term (pair what (map term arm)))
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++ chap-of |$ [arm] [doc=what arms=(map term arm)]
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::
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:: Traverse over a chapter in a battery.
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::
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++ traverse-chapter
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|* [state=mold in=mold out=mold]
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|= [[st=state chap=(chap-of in)] f=$-([state term in] [out state])]
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^- [(chap-of out) state]
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=^ arms st ((traverse-map state term in out) [st arms.chap] f)
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[chap(arms arms) st]
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::
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:: Traverse over a battery.
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::
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++ traverse-battery
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|* [state=mold in=mold out=mold]
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|= [[st=state batt=(batt-of in)] f=$-([state term in] [out state])]
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^- [(batt-of out) state]
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%+ (traverse-map state term (chap-of in) (chap-of out))
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[st batt]
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|= [st=state chapter-name=term chap=(chap-of in)]
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^- [(chap-of out) state]
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((traverse-chapter state in out) [st chap] f)
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::
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:: Map a function over all the arms in a battery.
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::
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++ turn-battery
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|* arm=mold
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|= [b=(batt-of arm) f=$-(arm arm)]
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^- (batt-of arm)
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%- ~(run by b)
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|= [w=what chap=(map term arm)]
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^- [what (map term arm)]
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:- w
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%- ~(run by chap)
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|= i=arm
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^- arm
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(f i)
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::
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:: Create a new xray with `xdat` set to `d`. If the xray is already in
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:: the table, do nothing.
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::
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++ post-xray
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|= [tbl=xtable ty=type d=(unit xdat)]
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^- [xkey xtable]
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::
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=/ old (~(get by type-map.tbl) ty)
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?^ old [u.old tbl]
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::
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=/ i=xkey next.tbl
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=/ x=xray [i ty d ~ ~ ~ ~ ~ ~ ~]
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::
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=. next.tbl +(next.tbl)
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=. xrays.tbl (~(put by xrays.tbl) i x)
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=. type-map.tbl (~(put by type-map.tbl) ty i)
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[i tbl]
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::
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:: Create an new xray and put it in the xray table. If there's already
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:: a stub xray under this type, replace it. Otherwise, allocate a
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:: new index and put it there.
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::
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++ replace-xray
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|= [img=xtable x=xray]
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^- xtable
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img(xrays (~(put by xrays.img) xkey.x x))
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::
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:: Get an xray, update its xdat, and put it back in.
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::
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++ set-xray-xdat
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|= [img=xtable i=xkey d=xdat]
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^- xtable
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=/ x=xray (focus-on img i)
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(replace-xray img x(xdat `d))
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::
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:: Get an xray from an `xtable`, given its `xkey`.
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::
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++ focus-on
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|= [img=xtable i=xkey]
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^- xray
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=/ res=(unit xray) (~(get by xrays.img) i)
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?~ res ~& ['internal error: invalid xray reference' i] !!
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u.res
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::
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:: Return a list of xrays referenced by an xrayed battery. (the context
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:: type and the type of each arm).
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::
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++ battery-refs
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|= b=xbat
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^- (list xkey)
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%- zing
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%+ turn ~(val by b)
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|= [=what =(map term xkey)]
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^- (list xkey)
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~(val by map)
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::
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:: Just for debugging: print an ximage and then return it.
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::
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++ trace-ximage
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|= img=ximage
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^- ximage
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~& ['root=' root.img]
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~& %+ sort ~(tap by xrays.xtable.img)
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|= [[xi=xkey x=xray] [yi=xkey y=xray]]
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(lth xi yi)
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img
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::
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:: All non-fork xrays referenced by a fork xray. This will recurse
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:: into forks-of-forks (and so on) and can handle infinite forks.
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::
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:: If this is called on a non-fork node, it will return a set with just
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:: that one node in it.
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::
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:: Separating this out really simplifies things, without this handling
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:: infinite forks is quite error-prone.
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::
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:: XX Should we collect face nodes instead of recursing into them (feels
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:: like yes, but why did I do it the other way before)?
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::
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:: XX This is turning out to be useful. Should we add a field to cache
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:: the result of this?
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::
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++ xray-branches
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|= [img=xtable i=xkey]
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^- (set xkey)
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::
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=/ acc=(set xkey) ~
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=/ stk=(set xkey) ~
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::
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|- ^- (set xkey)
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::
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?: (~(has in acc) i) acc
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?: (~(has in stk) i) acc
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::
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=. stk (~(put in stk) i)
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::
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=/ x=xray (focus-on img i)
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=/ d=xdat (need xdat.x)
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::
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?- d
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%noun (~(put in acc) i)
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%void (~(put in acc) i)
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[%atom *] (~(put in acc) i)
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[%cell *] (~(put in acc) i)
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[%core *] (~(put in acc) i)
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[%face *] $(i xray.d)
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[%pntr *] $(i xray.d)
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[%fork *] %+ (fold (set xkey) xkey)
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[acc ~(tap in set.d)]
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|= [=(set xkey) =xkey]
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^$(acc set, i xkey)
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==
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::
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+| %entry-point
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::
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:: The top-level routine: Takes a type, and xrays it to produce an
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:: ximage.
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::
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:: When we analyze a core, we also analyze its context. `core-depth`
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:: controls how deeply we will dig into the context. With `core-depth`
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:: at 0, we just pretend that all cores have a context of type `*`.
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::
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++ xray-type
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|= [core-depth=@ =type]
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^- ximage
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:: ~& %analyze-type
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=/ =ximage (analyze-type core-depth type)
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:: ~& %cleanup
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=. ximage (cleanup ximage)
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:: ~& %decorate-ximage-with-loops
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=. ximage (decorate-ximage-with-loops ximage)
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:: ~& %decorate-ximage-with-xpats
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=. ximage (decorate-ximage-with-xpats ximage)
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:: ~& %decorate-ximage-with-xshapes
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=. ximage (decorate-ximage-with-xshapes ximage)
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:: ~& %trace-ximage
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:: =. ximage (trace-ximage ximage)
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:: ~& %decorate-ximage-with-xroles
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(decorate-ximage-with-xroles ximage)
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:: ~& %trace-ximage
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:: (trace-ximage ximage)
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::
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+| %analysis-passes
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::
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:: The main analysis code.
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::
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:: For every type we encounter,
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::
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:: - First check if an xray for this has already been created. This
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:: could either be a recursive reference or just something we've
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:: already processed. At this point we don't care.
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::
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:: - Next, allocate a new xray for this type with empty xdat. If
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:: we encounter this type again recursively, that's fine, that will
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:: just produce a reference to this xray and it will eventually
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:: have xdat.
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::
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:: - Next, recurse into all referenced types and build out graph
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:: nodes for those.
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::
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:: - Finally, create `xdat` based on the above, and update the xray
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:: to have that xdat.
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::
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:: - The two edge-cases here are %hint and %hold. For those, we simply
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:: do everything in exactly the same way except that `xdat`
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:: will be set to `[%pntr *]`. We will resolve all of these
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:: references in the first analysis pass (`cleanup`).
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::
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++ analyze-type
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|= [core-depth=@ud =top=type]
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^- ximage
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::
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|^ (main [0 ~ ~] top-type)
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::
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++ main
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|= [st=xtable ty=type]
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^- [xkey xtable]
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::
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=/ old (~(get by type-map.st) ty) :: already done
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?^ old [u.old st]
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::
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=^ res=xkey st (post-xray st ty ~)
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::
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:- res
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?- ty
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%void (set-xray-xdat st res %void)
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%noun (set-xray-xdat st res %noun)
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[%atom *] (set-xray-xdat st res ty)
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[%cell *] =^ hed=xkey st (main st p.ty)
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=^ tyl=xkey st (main st q.ty)
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(set-xray-xdat st res [%cell hed tyl])
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[%core *] =^ d=xdat st (xray-core [p.ty q.ty] st)
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(set-xray-xdat st res d)
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[%face *] =^ i=xkey st (main st q.ty)
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(set-xray-xdat st res [%face p.ty i])
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[%fork *] =^ br st ((traverse-set xtable type xkey) [st p.ty] main)
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(set-xray-xdat st res [%fork br])
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[%hint *] =^ ref st (main st q.ty)
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=^ updated st (hint st p.ty (focus-on st res))
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(set-xray-xdat (replace-xray st updated) res [%pntr ref])
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[%hold *] =^ ref st (main st ~(repo ut ty))
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(set-xray-xdat st res [%pntr ref])
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==
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::
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:: Analyze a %hint type.
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::
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:: This updates the `helps`, `studs`, and/or `recipe` fields of the
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:: given xray.
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::
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++ hint
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|= [st=xtable [subject-of-note=type =note] x=xray]
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^- [xray xtable]
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?- -.note
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%help :_ st x(helps (~(put in helps.x) p.note))
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%know :_ st x(studs (~(put in studs.x) p.note))
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%made =^ recipe st
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?~ q.note [[%direct p.note] st]
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=^ params=(list xkey) st
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|- ^- [(list xkey) xtable]
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?~ u.q.note [~ st]
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=/ tsgl [%tsgl [%limb %$] [%wing i.u.q.note]]
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=/ part (~(play ut subject-of-note) tsgl)
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=^ this st (main st part)
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=^ more st $(u.q.note t.u.q.note)
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[[this more] st]
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[[%synthetic p.note params] st]
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:_ st x(recipes (~(put in recipes.x) recipe))
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==
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::
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:: Analyze a core.
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::
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:: When we analyze the context, we decrement `core-depth`. If that
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:: ever hits zero, we substitute `%noun` for the type of the context.
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::
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:: The reason that we switch the variance to %gold is because the
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:: core we're creating isn't an actual core, we're just using the arms
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:: of this core as a namespace in which to evaluate each arm.
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::
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:: Also, in general, there's no way to determine the type of an arm
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:: of a wet core, so we just assign all wet arms the type `%noun`.
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::
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:: This seems to work in practice, but I don't think it's actually
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:: sound.
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::
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++ xray-core
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|= [[=payload=type =coil] st=xtable]
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^- [xdat xtable]
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::
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=^ payload-xkey st (main st payload-type)
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=/ ctx=type [%core payload-type coil(r.p %gold)]
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::
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=^ batt st
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%+ (traverse-battery xtable hoon xkey)
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[st q.r.coil]
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|= [st=xtable nm=term =hoon]
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^- [xkey xtable]
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?: =(%wet q.p.coil) (post-xray st %noun `%noun)
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?: =(0 core-depth) (post-xray st %noun `%noun)
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=. core-depth (dec core-depth)
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(main st [%hold ctx hoon])
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::
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[[%core p.coil payload-xkey batt] st]
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::
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--
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::
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:: Remove `%pntr` nodes, replacing references to them with references
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:: to what they resolve to.
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::
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:: 1. Build a list of reachable, non-reference nodes.
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:: 2. Build a table of references mapped to the node they resolve to.
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:: 3. If the root node is a pointer, replace it with what it references.
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:: 4. Map over `type-map`, and replace every value using the table from #2.
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:: 5. Map over the xrays, drop pointer nodes, replace every reference
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:: using the table from #2.
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::
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++ cleanup
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|= xt=ximage
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^- ximage
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::
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=/ img=xtable xtable.xt
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::
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|^ =/ =xkey root.xt
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:: ~& %build-table
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=/ tbl (build-table xkey)
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:: ~& %fix-xkey
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=. xkey (fix-xkey tbl xkey)
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:: ~& %fix-type-map
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=. type-map.img (fix-type-map tbl type-map.img)
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:: ~& %fix-xrays
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=. xrays.img (fix-xrays tbl xrays.img)
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:: ~& :* %gc-results
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:: %before ~(wyt by xrays.xtable.xt)
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:: %after ~(wyt by xrays.img)
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:: ==
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[xkey img]
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::
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+$ table
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[live=(set xkey) refs=(map xkey xkey) refs-to=(map xkey (set xkey))]
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::
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:: Given a node that may be a pointer, follow the chain of pointers
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:: until we find a non-pointer node.
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::
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++ deref
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|= [img=xtable k=xkey]
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^- xkey
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|-
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=/ x=xray (focus-on img k)
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=/ d=xdat (need xdat.x)
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?. ?=([%pntr *] d) xkey.x
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$(k xray.d)
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::
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:: Walks the graph starting at the root, everything that's a %pntr
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:: node becomes a xkey in the `refs` table and one of the values in the
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:: `refs-to` table.
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::
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++ build-table
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|^ |= k=xkey
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^- table
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=/ t=table [~ ~ ~]
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=. t (recur t k)
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=. refs-to.t ((reverse-map xkey xkey) refs.t)
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t
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::
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++ recur
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|= [acc=table k=xkey]
|
|
^- table
|
|
::
|
|
?: (~(has in live.acc) k) acc :: already processed
|
|
?: (~(has by refs.acc) k) acc :: already processed
|
|
::
|
|
=/ x=xray (focus-on img k)
|
|
=/ d=xdat (need xdat.x)
|
|
::
|
|
=. acc ?. ?=([%pntr *] d)
|
|
acc(live (~(put in live.acc) k))
|
|
acc(refs (~(put by refs.acc) k (deref img k)))
|
|
::
|
|
((fold table xkey) [acc (xray-refs k)] recur)
|
|
--
|
|
::
|
|
:: Rebuild `type-map`:
|
|
::
|
|
:: - If a type points to a pointer xray, update it to point to what
|
|
:: that pointer resolves to
|
|
:: - If the type isn't referenced from the root node, ignore it.
|
|
:: - Otherwise, just copy it into the resulting table as-is.
|
|
::
|
|
++ fix-type-map
|
|
|= [tbl=table =(map type xkey)]
|
|
^- _map
|
|
%+ (fold _map (pair type xkey))
|
|
[*_map ~(tap by map)]
|
|
|= [acc=_map [ty=type k=xkey]]
|
|
=/ dest (~(get by refs.tbl) k)
|
|
?^ dest (~(put by acc) ty u.dest)
|
|
?. (~(has in live.tbl) k) acc
|
|
(~(put in acc) ty k)
|
|
::
|
|
:: Rebuild the `xrays` table.
|
|
::
|
|
:: - If the xray isn't in the `live` set (it wont be there if it's
|
|
:: a pointer node or if it's inaccessible from the root node),
|
|
:: then ignore it.
|
|
:: - Otherwise, copy the xray into the result map while updating
|
|
:: all its references.
|
|
::
|
|
++ fix-xrays
|
|
|= [tbl=table xrays=(map xkey xray)]
|
|
^- _xrays
|
|
%+ (fold (map xkey xray) (pair xkey xray))
|
|
[*(map xkey xray) ~(tap by xrays)]
|
|
|= [acc=(map xkey xray) [i=xkey x=xray]]
|
|
?. (~(has in live.tbl) i) acc :: Drop unused xrays
|
|
(~(put by acc) i (fix-xray tbl x))
|
|
::
|
|
:: All the xrays which are simply references to `i`.
|
|
::
|
|
++ all-refs-to
|
|
|= [tbl=table i=xkey]
|
|
^- (set xkey)
|
|
=/ res (~(get by refs-to.tbl) i)
|
|
?~(res ~ u.res)
|
|
::
|
|
:: There may be `%hint` xdat on the `%pntr` xrays. Find all pointer
|
|
:: nodes that reference this one, and put all of their hint-xdat onto
|
|
:: this xray.
|
|
::
|
|
++ collect-hints
|
|
|= [tbl=table target=xray]
|
|
^- xray
|
|
%+ (fold xray xkey)
|
|
[target ~(tap in (all-refs-to tbl xkey.target))]
|
|
|= [acc=xray ref=xkey]
|
|
=/ ref-xray=xray (focus-on img ref)
|
|
=/ helps ^- (set help) (~(uni in helps.acc) helps.ref-xray)
|
|
=/ recipes ^- (set recipe) (~(uni in recipes.acc) recipes.ref-xray)
|
|
::
|
|
=/ studs ^- (set stud) :: Type system hack
|
|
%+ (fold (set stud) stud)
|
|
[studs.acc ~(tap in studs.ref-xray)]
|
|
|= [acc=(set stud) new=stud]
|
|
(~(put in acc) new)
|
|
::
|
|
acc(helps helps, studs studs, recipes recipes)
|
|
::
|
|
:: Note that the `xroles` and `pats` fields may contain references
|
|
:: to other xrays as well. We don't bother to update those, because this
|
|
:: pass runs before those fields are populated.
|
|
::
|
|
++ fix-xray
|
|
|= [tbl=table x=xray]
|
|
^- xray
|
|
=. x (collect-hints tbl x)
|
|
%= x
|
|
xdat `(fix-xdat tbl (need xdat.x))
|
|
recipes %- ~(gas in *(set recipe))
|
|
%+ turn ~(tap in recipes.x)
|
|
|= r=recipe (fix-recipe tbl r)
|
|
==
|
|
::
|
|
:: Update all the references in the `xdat` field.
|
|
::
|
|
++ fix-xdat
|
|
|= [tbl=table d=xdat]
|
|
^- xdat
|
|
::
|
|
=/ fix |=(i=xkey (fix-xkey tbl i))
|
|
::
|
|
?- d
|
|
%noun d
|
|
%void d
|
|
[%atom *] d
|
|
[%cell *] d(head (fix head.d), tail (fix tail.d))
|
|
[%core *] d(xray (fix xray.d), batt (fix-battery tbl batt.d))
|
|
[%face *] d(xray (fix xray.d))
|
|
[%fork *] d(set (~(gas in *(set xkey)) (turn ~(tap in set.d) fix)))
|
|
[%pntr *] d(xray (fix xray.d))
|
|
==
|
|
::
|
|
++ fix-battery
|
|
|= [tbl=table b=xbat]
|
|
^- xbat
|
|
%+ (turn-battery xkey) b
|
|
|= i=xkey (fix-xkey tbl i)
|
|
::
|
|
++ fix-xkey
|
|
|= [tbl=table i=xkey]
|
|
^- xkey
|
|
=/ res=(unit xkey) (~(get by refs.tbl) i)
|
|
?^ res u.res
|
|
i
|
|
::
|
|
++ fix-recipe
|
|
|= [tbl=table r=recipe]
|
|
^- recipe
|
|
?- r
|
|
[%direct *] r
|
|
[%synthetic *] r(list (turn list.r |=(i=xkey (fix-xkey tbl i))))
|
|
==
|
|
::
|
|
++ xray-refs
|
|
|= i=xkey
|
|
^- (list xkey)
|
|
=/ x=xray (focus-on img i)
|
|
%- zing
|
|
^- (list (list xkey))
|
|
:~ ?~(xdat.x ~ (xdat-refs u.xdat.x))
|
|
(zing (turn ~(tap in recipes.x) recipe-refs))
|
|
?~(xrole.x ~ (xrole-refs u.xrole.x))
|
|
==
|
|
::
|
|
++ recipe-refs
|
|
|= r=recipe
|
|
^- (list xkey)
|
|
?- r
|
|
[%direct *] ~
|
|
[%synthetic *] list.r
|
|
==
|
|
::
|
|
++ xrole-refs
|
|
|= s=xrole
|
|
^- (list xkey)
|
|
?@ s ~
|
|
?- -.s
|
|
%constant ~
|
|
%instance ~
|
|
%option ~(val by map.s)
|
|
%union ~(val by map.s)
|
|
%junction ~[flat.s deep.s]
|
|
%conjunction ~[wide.s tall.s]
|
|
%misjunction ~[one.s two.s]
|
|
==
|
|
::
|
|
++ xdat-refs
|
|
|= d=xdat
|
|
^- (list xkey)
|
|
?- d
|
|
%noun ~
|
|
%void ~
|
|
[%atom *] ~
|
|
[%cell *] ~[head.d tail.d]
|
|
[%core *] [xray.d (battery-refs batt.d)]
|
|
[%face *] ~[xray.d]
|
|
[%pntr *] ~[xray.d]
|
|
[%fork *] ~(tap in set.d)
|
|
==
|
|
--
|
|
::
|
|
:: Detect loops.
|
|
::
|
|
:: This works by simply recursing through all the references within an
|
|
:: xray while keeping an explicit recursion stack: If we hit a node
|
|
:: that's in the stack, that's a loop. If we touch everything without
|
|
:: hitting a recursive reference, then it's not a loop.
|
|
::
|
|
:: Is the short-circuiting sound? I'm not sure now.
|
|
::
|
|
:: - When could it go wrong?
|
|
:: - This graph, for example:
|
|
::
|
|
:: ```
|
|
:: x -> y
|
|
:: y -> z
|
|
:: y -> y
|
|
:: z -> x
|
|
:: ```
|
|
::
|
|
:: - Let's say we process this starting with y, we will see that `y`
|
|
:: is a loop, and then when we go to process x, recursing into y will be
|
|
:: short-circuited since its `loop` field is already set.
|
|
::
|
|
:: - Well, maybe `x` will have been recognized as a loop during the
|
|
:: processing of `x`? I think it depends on whether we continue
|
|
:: to trace through all references from `y` even after we've found
|
|
:: a loop, and I think we do.
|
|
::
|
|
:: - Put another way, this will recurse into everything referenced
|
|
:: by a type, and only mark loops once it's encountered them:
|
|
:: After processing a type, every type that it references
|
|
:: (transitive closure) will have been processed correctly.
|
|
::
|
|
++ decorate-ximage-with-loops
|
|
|= xt=ximage
|
|
^- ximage
|
|
|^ xt(xtable decorated)
|
|
::
|
|
++ decorated
|
|
^- xtable
|
|
=/ all-indicies ~(tap in ~(key by xrays.xtable.xt))
|
|
((fold xtable xkey) [xtable.xt all-indicies] decorate)
|
|
::
|
|
++ decorate
|
|
|= [img=xtable i=xkey]
|
|
^- xtable
|
|
::
|
|
=/ trace=(set xkey) ~
|
|
|- ^- xtable
|
|
::
|
|
=/ x (focus-on img i)
|
|
=/ dat (need xdat.x)
|
|
::
|
|
?. =(~ loop.x) img :: already done
|
|
?: (~(has in trace) i) (replace-xray img x(loop `%.y))
|
|
::
|
|
=. trace (~(put in trace) i)
|
|
::
|
|
=. img
|
|
?- dat
|
|
%noun img
|
|
%void img
|
|
[%atom *] img
|
|
[%cell *] =. img $(i head.dat)
|
|
$(i tail.dat)
|
|
[%core *] =. img $(i xray.dat)
|
|
%+ (fold xtable xkey)
|
|
[img (battery-refs batt.dat)]
|
|
|= [img=xtable i=xkey]
|
|
^$(img img, i i)
|
|
[%face *] $(i xray.dat)
|
|
[%pntr *] $(i xray.dat)
|
|
[%fork *] %+ (fold xtable xkey)
|
|
[img ~(tap in set.dat)]
|
|
|= [img=xtable i=xkey]
|
|
^$(img img, i i)
|
|
==
|
|
::
|
|
=. x (focus-on img i) :: get updated xray
|
|
?^ loop.x img :: loop found
|
|
(replace-xray img x(loop `%.n)) :: no loop found
|
|
--
|
|
::
|
|
:: Fills in the `xpats` fields in each xray (where possible).
|
|
::
|
|
:: This has a list of xpat "matchers", and, for each xray in the
|
|
:: ximage, it tries each matcher until one of them succeeds.
|
|
::
|
|
++ decorate-ximage-with-xpats
|
|
|= xt=ximage
|
|
^- ximage
|
|
::
|
|
=/ img=xtable xtable.xt
|
|
::
|
|
|^ =/ pairs %+ turn ~(tap by xrays.xtable.xt)
|
|
|= [i=xkey x=xray]
|
|
^- [xkey xray]
|
|
[i x(pats (xray-pats x))]
|
|
xt(xrays.xtable (~(gas by *(map xkey xray)) pairs))
|
|
::
|
|
++ xpats
|
|
^- (list $-(xray (unit xpat)))
|
|
:~ tree-xpat
|
|
list-xpat
|
|
unit-xpat
|
|
core-xpat
|
|
spec-xpat
|
|
type-xpat
|
|
manx-xpat
|
|
vase-xpat
|
|
hoon-xpat
|
|
json-xpat
|
|
nock-xpat
|
|
plum-xpat
|
|
skin-xpat
|
|
==
|
|
::
|
|
++ xray-pats
|
|
|= x=xray
|
|
^- (unit xpat)
|
|
::
|
|
=/ i=xkey xkey.x
|
|
=/ t=type type.x
|
|
=/ d=xdat (need xdat.x)
|
|
::
|
|
:: Atom printing works just fine using the xdat field.
|
|
?: ?=([%atom *] d) ~
|
|
::
|
|
=/ match xpats
|
|
::
|
|
|- ^- (unit xpat)
|
|
?~ match ~
|
|
=/ pat (i.match x)
|
|
?^ pat pat
|
|
$(match t.match)
|
|
::
|
|
++ simple-nest-xpat
|
|
|= [ty=type pat=xpat]
|
|
^- $-(xray (unit xpat))
|
|
|= x=xray
|
|
^- (unit xpat)
|
|
=/ subtype (~(nest ut ty) | type.x)
|
|
?:(subtype `pat ~)
|
|
::
|
|
++ type-xpat (simple-nest-xpat -:!>(*type) %type)
|
|
++ spec-xpat (simple-nest-xpat -:!>(*spec) %spec)
|
|
++ manx-xpat (simple-nest-xpat -:!>(*manx) %manx)
|
|
++ vase-xpat (simple-nest-xpat -:!>(*vase) %vase)
|
|
++ hoon-xpat (simple-nest-xpat -:!>(*hoon) %hoon)
|
|
++ json-xpat (simple-nest-xpat -:!>(*json) %json)
|
|
++ nock-xpat (simple-nest-xpat -:!>(*nock) %nock)
|
|
++ plum-xpat (simple-nest-xpat -:!>(*plum) %plum)
|
|
++ skin-xpat (simple-nest-xpat -:!>(*skin) %skin)
|
|
::
|
|
++ focus
|
|
|= i=xkey
|
|
^- xray
|
|
(focus-on img i)
|
|
::
|
|
++ is-nil
|
|
|= i=xkey
|
|
^- ?
|
|
=/ d=xdat (need xdat:(focus i))
|
|
?+ d %.n
|
|
[%atom *] =(d [%atom ~.n `0])
|
|
[%face *] $(i xray.d)
|
|
==
|
|
::
|
|
:: Is `ref`, after dereferencing faces, a loop-reference to `target`?
|
|
::
|
|
++ is-ref-to
|
|
|= [target=xkey ref=xkey]
|
|
^- ?
|
|
?: =(target ref) %.y
|
|
=/ =xdat (need xdat:(focus ref))
|
|
?: ?=([%face *] xdat) $(ref xray.xdat)
|
|
%.n
|
|
::
|
|
:: Is an xray an atom with the specified aura?
|
|
::
|
|
++ is-atom-with-aura
|
|
|= [c=cord i=xkey]
|
|
^- ?
|
|
=/ =xdat (need xdat:(focus i))
|
|
?+ xdat %.n
|
|
[%atom *] =(xdat [%atom aura=c constant-unit=~])
|
|
[%face *] $(i xray.xdat)
|
|
==
|
|
::
|
|
:: If the xray is a exactly two things, nil and a cell type, then
|
|
:: yield the xray for the cell type.
|
|
::
|
|
++ fork-of-nil-and-cell
|
|
|= x=xray
|
|
^- (unit xkey)
|
|
::
|
|
=/ d=xdat (need xdat.x)
|
|
::
|
|
?. ?=([%fork *] d) ~
|
|
::
|
|
=/ branches ~(tap in set.d)
|
|
?. ?=([* * ~] branches) ~
|
|
::
|
|
=/ nil i.branches
|
|
=/ node i.t.branches
|
|
|-
|
|
::
|
|
?: (is-nil node) $(node nil, nil node)
|
|
?. (is-nil nil) ~
|
|
::
|
|
`node
|
|
::
|
|
:: Is this xray a unit? (the %unit xpat)
|
|
::
|
|
:: This matches strictly. For example `[~ %a]` doesn't match, but
|
|
:: `^-((unit @) [~ %a])` does.
|
|
::
|
|
++ unit-xpat
|
|
|^ |= x=xray
|
|
^- (unit xpat)
|
|
=/ elem (match-unit-type-strict (focus xkey.x))
|
|
?~ elem ~
|
|
`[%unit u.elem]
|
|
::
|
|
++ match-unit-type-strict
|
|
|= =input=xray
|
|
^- (unit xkey)
|
|
::
|
|
=/ node=(unit xkey) (fork-of-nil-and-cell input-xray)
|
|
?~ node ~
|
|
::
|
|
=/ node-xdat=xdat (need xdat:(focus u.node))
|
|
::
|
|
?. ?=([%cell *] node-xdat) ~
|
|
?. (is-nil head.node-xdat) ~
|
|
=/ elem-xkey tail.node-xdat
|
|
=/ elem-xdat (need xdat:(focus elem-xkey))
|
|
?. ?=([%face *] elem-xdat) ~
|
|
::
|
|
`xray.elem-xdat
|
|
--
|
|
::
|
|
:: Is this xray a tree? (the %tree xpat)
|
|
::
|
|
++ tree-xpat
|
|
|^ |= =input=xray
|
|
^- (unit xpat)
|
|
=/ input-xkey=xkey xkey.input-xray
|
|
=/ inxdat=xdat (need xdat.input-xray)
|
|
?. ?=([%fork *] inxdat) ~
|
|
=/ branches ~(tap in set.inxdat)
|
|
?. ?=([* * ~] branches) ~
|
|
=/ nil i.branches
|
|
=/ node i.t.branches
|
|
|-
|
|
?: (is-nil node) $(node nil, nil node)
|
|
?. (is-nil nil) ~
|
|
=/ node-xdat=xdat (need xdat:(focus node))
|
|
?. ?=([%cell *] node-xdat) ~
|
|
?. (is-pair-of-refs-to input-xkey tail.node-xdat)
|
|
~
|
|
=/ elem-xdat (need xdat:(focus head.node-xdat))
|
|
?. ?=([%face *] elem-xdat) ~
|
|
`[%tree xray.elem-xdat]
|
|
::
|
|
++ is-pair-of-refs-to
|
|
|= [target=xkey cell=xkey]
|
|
^- ?
|
|
=/ =xdat (need xdat:(focus cell))
|
|
?: ?=([%face *] xdat) $(cell xray.xdat)
|
|
?. ?=([%cell *] xdat) %.n
|
|
?. (is-ref-to target head.xdat) %.n
|
|
?. (is-ref-to target tail.xdat) %.n
|
|
%.y
|
|
--
|
|
::
|
|
::
|
|
:: Is this xray a list? (a %list, %tape, %path, or %tour xpat)
|
|
::
|
|
:: This handles the special case of path literals not having a
|
|
:: list type: `/a/b` is just a macro for `[%a %b ~]`, but doesn't
|
|
:: accept this for other lists: We don't want ['a' %n ~] to be printed
|
|
:: as `['a' ~[%n]]`. However, we WILL print ['a' ~['b' 'c']] as ~['a'
|
|
:: 'b' 'c']. And that's what `match-list` matches on.
|
|
::
|
|
:: `match-list` checks is a type is informally a list: Is it a
|
|
:: cell with a (formal or informal) list in its tail?
|
|
::
|
|
:: `match-list-type-strict` checks if a list literally has the shape
|
|
:: of a `list type`. It must be a loop reference and fork of two
|
|
:: types, one of which is the nil type and the other is a cell with a
|
|
:: face in its head and loop reference as its tail.
|
|
::
|
|
++ list-xpat
|
|
|^ |= x=xray
|
|
^- (unit xpat)
|
|
=/ elem (match-list x)
|
|
?~ elem ~
|
|
?: (is-atom-with-aura 'tD' u.elem) [~ %tape]
|
|
?: (is-atom-with-aura 'ta' u.elem) [~ %path]
|
|
?: (is-atom-with-aura 'c' u.elem) [~ %tour]
|
|
?: (is-atom-with-aura 'tas' u.elem) [~ %path]
|
|
`[%list u.elem]
|
|
::
|
|
++ match-list
|
|
|= =input=xray
|
|
^- (unit xkey)
|
|
=/ d=xdat (need xdat.input-xray)
|
|
?+ d ~
|
|
[%face *] (match-list (focus xray.d))
|
|
[%fork *] (match-list-type-strict input-xray)
|
|
[%cell *] =/ elem-xkey=(unit xkey)
|
|
?: ?&((is-nil tail.d) (is-atom-with-aura 'tas' head.d))
|
|
`head.d
|
|
(match-list (focus tail.d))
|
|
?~ elem-xkey ~
|
|
?. (is-ref-to u.elem-xkey head.d) ~
|
|
`u.elem-xkey
|
|
==
|
|
::
|
|
++ match-list-type-strict
|
|
|= =input=xray
|
|
^- (unit xkey)
|
|
::
|
|
=/ node=(unit xkey) (fork-of-nil-and-cell input-xray)
|
|
?~ node ~
|
|
::
|
|
=/ node-xdat=xdat (need xdat:(focus u.node))
|
|
?. ?=([%cell *] node-xdat) ~
|
|
?. (is-ref-to xkey.input-xray tail.node-xdat) ~
|
|
::
|
|
=/ elem-xdat (need xdat:(focus head.node-xdat))
|
|
?. ?=([%face *] elem-xdat) ~
|
|
::
|
|
`xray.elem-xdat
|
|
--
|
|
::
|
|
:: A %gear is any core with a cell context.
|
|
::
|
|
:: A %gate is a gear with one chapter ('') with one arm ('').
|
|
::
|
|
++ core-xpat
|
|
|^ |= x=xray
|
|
^- (unit xpat)
|
|
=. x (focus xkey.x)
|
|
=/ gear (match-gear x)
|
|
?~ gear ~
|
|
=/ gate (match-gate x sample.u.gear batt.u.gear)
|
|
?^ gate gate
|
|
~ :: XX gear
|
|
::
|
|
++ match-gear
|
|
|= =input=xray
|
|
^- (unit [%gear sample=xkey context=xkey batt=xbat])
|
|
::
|
|
=/ input-xdat (need xdat.input-xray)
|
|
?. ?=([%core *] input-xdat) ~
|
|
=/ context-xkey=xkey xray.input-xdat
|
|
::
|
|
=/ context-xdat=xdat (need xdat:(focus context-xkey))
|
|
?. ?=([%cell *] context-xdat) ~
|
|
::
|
|
=/ sample-xkey=xkey head.context-xdat
|
|
=. context-xkey tail.context-xdat
|
|
`[%gear sample-xkey context-xkey batt.input-xdat]
|
|
::
|
|
++ match-gate
|
|
|= [=input=xray sample=xkey batt=xbat]
|
|
^- (unit [%gate xkey xkey])
|
|
::
|
|
=/ input-xdat (need xdat.input-xray)
|
|
?. ?=([%core *] input-xdat) ~
|
|
=/ chapters ~(tap by batt)
|
|
::
|
|
?~ chapters ~
|
|
?^ t.chapters ~
|
|
?. =(p.i.chapters '') ~
|
|
::
|
|
=/ arms=(list (pair term xkey)) ~(tap by q.q.i.chapters)
|
|
::
|
|
?~ arms ~
|
|
?^ t.arms ~
|
|
?. =(p.i.arms '') ~
|
|
::
|
|
=/ product=xkey q.i.arms
|
|
::
|
|
`[%gate sample product]
|
|
--
|
|
::
|
|
--
|
|
::
|
|
:: Determines the loose shape of each node in an ximage.
|
|
::
|
|
:: This is trival for everything besides forks, and for forks, we just
|
|
:: find all the non-fork branches with `xray-branches` and then calculate
|
|
:: the union type with `combine`.
|
|
::
|
|
:: Here's some pseudocode for the essence of the logic that we're
|
|
:: trying to implement here:
|
|
::
|
|
:: xdat Data = Noun | Void
|
|
:: | Atom | Cnst
|
|
:: | Cell Data Data
|
|
:: | Fork Data Data
|
|
::
|
|
:: xdat Shape = Noun | Void | Atom | Cnst | Cell | Junc
|
|
::
|
|
:: shape :: Data -> Shape
|
|
:: shape Noun = Noun
|
|
:: shape Void = Void
|
|
:: shape Atom = Atom
|
|
:: shape Cnst = Atom
|
|
:: shape (Cell a b) = Cell
|
|
:: shape (Fork x y) = forkShape (shape x) (shape y)
|
|
::
|
|
:: forkShape :: Shape -> Shape -> Shape
|
|
:: forkShape Void x = x
|
|
:: forkShape Noun _ = Noun
|
|
:: forkShape Junc _ = Junc
|
|
:: forkShape Atom Cell = Junc
|
|
:: forkShape x y | x==y = x
|
|
:: forkShape x y = forkShape y x
|
|
::
|
|
++ decorate-ximage-with-xshapes
|
|
|^ |= xt=ximage
|
|
^- ximage
|
|
=/ keys ~(tap in ~(key by xrays.xtable.xt))
|
|
%= xt xtable
|
|
%+ (fold xtable xkey)
|
|
[xtable.xt keys]
|
|
|= [st=xtable i=xkey]
|
|
xtable:(xray-xshape st i)
|
|
==
|
|
::
|
|
:: Calculate the xray
|
|
::
|
|
++ xray-xshape
|
|
|= [st=xtable i=xkey]
|
|
^- [xshape =xtable]
|
|
::
|
|
=/ x=xray (focus-on st i)
|
|
=/ dat (need xdat.x)
|
|
::
|
|
?^ xshape.x [u.xshape.x st] :: already processed
|
|
::
|
|
=^ res=xshape st
|
|
?- dat
|
|
%noun [%noun st]
|
|
%void [%void st]
|
|
[%atom *] [%atom st]
|
|
[%cell *] [%cell st]
|
|
[%core *] [%cell st]
|
|
[%fork *] (fork-xshape st (xray-branches st xkey.x))
|
|
[%face *] (xray-xshape st xray.dat)
|
|
[%pntr *] !! :: run `cleanup` first
|
|
==
|
|
::
|
|
=/ y=xray x :: type system hack
|
|
=. xshape.y `res
|
|
=. xrays.st (~(put by xrays.st) xkey.y y)
|
|
[res st]
|
|
::
|
|
:: Because `branches` comes from `xray-branches`, none of the xrays
|
|
:: we're folding over will be forks, therefore, we none of our calls
|
|
:: to `xray-xshape` will recurse: we won't get stuck in a loop.
|
|
::
|
|
++ fork-xshape
|
|
|= [st=xtable branches=(set xkey)]
|
|
^- [xshape xtable]
|
|
%+ (fold (pair xshape xtable) xkey)
|
|
[[%void st] ~(tap in branches)]
|
|
|= [acc=(pair xshape xtable) i=xkey]
|
|
^- [xshape xtable]
|
|
=^ res st (xray-xshape q.acc i)
|
|
[(combine p.acc res) st]
|
|
::
|
|
:: Given the xshapes of two types, determine the xshape of their union.
|
|
::
|
|
++ combine
|
|
|= [x=xshape y=xshape]
|
|
^- xshape
|
|
?: =(x y) x
|
|
?: =(x %void) y
|
|
?: =(y %void) x
|
|
?: =(x %noun) %noun
|
|
?: =(y %noun) %noun
|
|
%junc
|
|
--
|
|
::
|
|
:: Determine the `xrole` of each xray node, restructuring forks to make
|
|
:: them coherent.
|
|
::
|
|
:: This is fairly simple for non-role types, and we handle forks the
|
|
:: same way we do with `xshape` detection. The basic move is to get all
|
|
:: of the non-fork branches using `xray-branches`, make a list of them,
|
|
:: and fold a function over that. However, the function we're folding with
|
|
:: is MUCH more complicated.
|
|
::
|
|
:: One of the big sources of complexity is that we need to restructure
|
|
:: the shape of forks, so we will be creating a bunch of new graph
|
|
:: nodes, and rearranging them. For example, if we want to merge a
|
|
:: junction (a fork of an atom and a cell) with an atom type, we create
|
|
:: a new junction xray that is a fork of the old cell type and the
|
|
:: union of the two cell types. The function we fold with is `merge`,
|
|
:: but the bulk of the logic lives in `combine`.
|
|
::
|
|
:: Here's some pseudocode for the essence of the logic that we're
|
|
:: trying to implement here. Note that the code is actually shaped
|
|
:: quite differently than this and is much more detailed. So, try
|
|
:: to wrap your head around WHY this makes sense instead of just
|
|
:: trying to use this a map for the actual code.
|
|
::
|
|
:: xdat Data = Noun | Void
|
|
:: | Atom | Cnst
|
|
:: | Cell Data Data
|
|
:: | Fork Data Data
|
|
::
|
|
:: xdat Shape = Noun | Void | Atom | Cnst | Cell | Junc
|
|
::
|
|
:: xdat Role = Void | Noun
|
|
:: | Atom | Cnst
|
|
:: | Tall | Wide | Instance
|
|
:: | Option | Union | Conjunc | Junc
|
|
:: | Misjunc
|
|
::
|
|
:: role :: Data -> Unit Role
|
|
:: role Noun = ~
|
|
:: role Void = ~
|
|
:: role Atom = ~
|
|
:: role Cnst = ~
|
|
:: role (Cell hd _) = `(cellRoleByHead (shape hd))
|
|
:: role (Fork x y) = `(forkRole (shape x, role x) (shape y, role y))
|
|
::
|
|
:: cellRoleByHead :: Shape -> Unit Role
|
|
:: cellRoleByHead Cell = `Wide
|
|
:: cellRoleByHead Cnst = `Instance
|
|
:: cellRoleByHead Atom = `Tall
|
|
:: cellRoleByHead _ = ~
|
|
::
|
|
:: forkRole :: (Shape,Role) + (Shape,Role) -> Role
|
|
:: forkRole
|
|
:: Option <- option + option
|
|
:: Union <- union + union
|
|
:: Conjunc <- tall + wide
|
|
:: Junc <- atom + cell
|
|
:: Misjunc <- otherwise
|
|
:: where
|
|
:: option = role==Option || role==Instance
|
|
:: union = shape==Cnst || role==Union
|
|
:: atom = shape==Atom || shape==Cnst
|
|
:: cell = shape==Cell
|
|
:: tall = role==Tall
|
|
:: wide = role==Wide
|
|
:: cell = shape==Cell
|
|
::
|
|
++ decorate-ximage-with-xroles
|
|
|^ |= xt=ximage
|
|
^- ximage
|
|
::
|
|
=/ keys=(list xkey) ~(tap in ~(key by xrays.xtable.xt))
|
|
::
|
|
%= xt xtable
|
|
%+ (fold xtable xkey) [xtable.xt keys]
|
|
|= [st=xtable i=xkey]
|
|
^- xtable
|
|
xtable:(xray-xrole st i)
|
|
==
|
|
::
|
|
:: Given a type and xdat, either find the xray corresponding to that
|
|
:: type, or create a new one.
|
|
::
|
|
:: These xrays are for internal types that we create in order to
|
|
:: restructure forks, therefore they will never be loops.
|
|
::
|
|
++ alloc-fork-xray
|
|
|= [st=xtable ty=type d=xdat]
|
|
^- [xkey xtable]
|
|
=/ old=(unit xkey) (~(get by type-map.st) ty)
|
|
?^ old [u.old st]
|
|
=/ xkey next.st
|
|
=/ res=xray [xkey ty `d ~ ~ ~ ~ ~ ~ `%.n]
|
|
=. next.st +(xkey)
|
|
=. xrays.st (~(put by xrays.st) xkey.res res)
|
|
=. type-map.st (~(put by type-map.st) type.res xkey.res)
|
|
[xkey st]
|
|
::
|
|
:: Produces an xtable updated to have xrole information for a certain
|
|
:: node. For convenience, it also returns the xrole itself.
|
|
::
|
|
:: Note that the xrole of a core is always %wide, since the head of
|
|
:: a core is a battery, which is always a cell.
|
|
::
|
|
++ xray-xrole
|
|
|= [st=xtable i=xkey]
|
|
^- [=xrole =xtable]
|
|
=/ x=xray (focus-on st i)
|
|
::
|
|
=/ old xrole.x
|
|
?^ old [u.old st]
|
|
::
|
|
=/ dat=xdat (need xdat.x)
|
|
::
|
|
=^ res=xrole st
|
|
?: ?=([~ %void] xshape.x) [%void st] :: optimization
|
|
?: ?=([~ %noun] xshape.x) [%noun st] :: optimization
|
|
?- dat
|
|
%noun :_ st %noun
|
|
%void :_ st %void
|
|
[%atom *] :_ st (atom-xrole dat)
|
|
[%cell *] :_ st (cell-xrole-by-head (focus-on st head.dat))
|
|
[%core *] :_ st %wide
|
|
[%face *] (xray-xrole st xray.dat)
|
|
[%pntr *] !! :: Run `cleanup` first.
|
|
[%fork *] (fork-xrole st (xray-branches st xkey.x))
|
|
==
|
|
::
|
|
=. xrays.st (~(put by xrays.st) xkey.x x(xrole `res))
|
|
[res st]
|
|
::
|
|
:: Determines the xrole of an atom xray.
|
|
::
|
|
++ atom-xrole
|
|
|= [%atom =aura =constant=(unit @)]
|
|
^- xrole
|
|
?~ constant-unit %atom
|
|
[%constant u.constant-unit]
|
|
::
|
|
:: Calculate the xrole of a %cell xray.
|
|
::
|
|
:: XX I'm not sure this is correct. Should a cell with a noun head
|
|
:: be %tall? How about a %void head?
|
|
::
|
|
:: - A %void head should probably be %void.
|
|
:: - A %noun head should probably just be %cell, a xrole separate from
|
|
:: (%wide and %tall) to make the ambiguity explicit. For example,
|
|
:: the union of `[* @] + [@ @]` should be a misjunction, which isn't
|
|
:: what's happening now.
|
|
::
|
|
:: XX Also! A cell with a junction in its head should be a
|
|
:: conjunction, right?
|
|
::
|
|
++ cell-xrole-by-head
|
|
|= head=xray
|
|
^- xrole
|
|
::
|
|
=/ =xshape (need xshape.head)
|
|
=/ =xdat (need xdat.head)
|
|
::
|
|
=/ const ?. ?=([%atom *] xdat) ~
|
|
constant.xdat
|
|
::
|
|
?: =(xshape %cell) %wide
|
|
?^ const [%instance u.const]
|
|
%tall
|
|
::
|
|
:: Determine the xrole of %fork type.
|
|
::
|
|
:: Fold over all the branches off a fork using the `merge` function,
|
|
:: and then grab its `xrole` using `xray-xrole`.
|
|
::
|
|
:: In any non-trivial cases, the xray returned from `merge` will
|
|
:: already have its `xrole` set, so recursing into `xray-xrole`
|
|
:: shouldn't be dangerous.
|
|
::
|
|
:: XX This is probably an important part of the control-flow, and it
|
|
:: might be helpful to make this invariant more prominent.
|
|
::
|
|
++ fork-xrole
|
|
|= [st=xtable fork=(set xkey)]
|
|
^- [xrole xtable]
|
|
::
|
|
=^ void st (post-xray st %void `%void)
|
|
::
|
|
=^ i=xkey st
|
|
^- [xkey xtable]
|
|
%+ (fold ,[xkey xtable] xkey)
|
|
[[void st] ~(tap in fork)]
|
|
|= [[k=xkey tbl=xtable] branch=xkey]
|
|
^- [xkey xtable]
|
|
(merge tbl k branch)
|
|
::
|
|
(xray-xrole st i)
|
|
::
|
|
:: Return an xray of the union of two xrays.
|
|
::
|
|
++ merge
|
|
|= [st=xtable this=xkey that=xkey]
|
|
^- [xkey xtable]
|
|
=/ this-xray=xray (focus-on st this)
|
|
=/ that-xray=xray (focus-on st that)
|
|
?: =(%void type.this-xray) [that st]
|
|
?: =(%void type.that-xray) [this st]
|
|
(combine st this that)
|
|
::
|
|
:: =collate-union: merge union maps
|
|
::
|
|
++ collate-union
|
|
|^ |= [st=xtable thick=(map atom xkey) thin=(map atom xkey)]
|
|
^- [(map atom xkey) xtable]
|
|
::
|
|
=/ list=(list (pair atom xkey)) ~(tap by thin)
|
|
::
|
|
|- ^- [(map atom xkey) xtable]
|
|
::
|
|
?~ list [thick st]
|
|
=/ item=(unit xkey) (~(get by thick) p.i.list)
|
|
=^ merged=xkey st ?~ item [q.i.list st]
|
|
(merge-instances st p.i.list u.item q.i.list)
|
|
=/ new-thick (~(put by thick) p.i.list merged)
|
|
$(list t.list, thick new-thick)
|
|
::
|
|
:: We want to merge two cell-types that have the same head; gross.
|
|
::
|
|
:: First, get both tail types, merge them, produce a new cell type
|
|
:: with the merged tail.
|
|
::
|
|
++ merge-instances
|
|
|= [st=xtable =atom =x=xkey =y=xkey]
|
|
^- [xkey xtable]
|
|
::
|
|
=/ x-xray=xray (focus-on st x-xkey)
|
|
=/ x-xdat=xdat (need xdat.x-xray)
|
|
|- ^- [xkey xtable]
|
|
::
|
|
?: ?=([%face *] x-xdat)
|
|
$(x-xdat (need xdat:(focus-on st xray.x-xdat)))
|
|
?> ?=([%cell *] x-xdat)
|
|
=/ x-tail=xkey tail.x-xdat
|
|
=/ head-xray=xray (focus-on st head.x-xdat)
|
|
::
|
|
=/ y-xray=xray (focus-on st y-xkey)
|
|
=/ y-xdat=xdat (need xdat.y-xray)
|
|
|- ^- [xkey xtable]
|
|
::
|
|
?: ?=([%face *] y-xdat)
|
|
$(y-xdat (need xdat:(focus-on st xray.y-xdat)))
|
|
?> ?=([%cell *] y-xdat)
|
|
=/ y-tail=xkey tail.y-xdat
|
|
::
|
|
=^ merged-tail st (merge st x-tail y-tail)
|
|
=/ tail-xray=xray (focus-on st merged-tail)
|
|
::
|
|
=/ res-ty=type [%cell type.head-xray type.tail-xray]
|
|
=/ res-xdat=xdat [%cell xkey.head-xray xkey.tail-xray]
|
|
=^ res-xkey st (alloc-fork-xray st res-ty res-xdat)
|
|
::
|
|
=/ res-xray=xray (focus-on st res-xkey)
|
|
=. xshape.res-xray `%cell
|
|
=. xrole.res-xray `[%instance atom]
|
|
=. xrays.st (~(put by xrays.st) res-xkey res-xray)
|
|
::
|
|
[xkey.res-xray st]
|
|
--
|
|
::
|
|
:: =collate-option: merge option maps
|
|
::
|
|
++ collate-option
|
|
|= [st=xtable thick=(map atom xkey) thin=(map atom xkey)]
|
|
^- [(map atom xkey) xtable]
|
|
=/ list=(list (pair atom xkey)) ~(tap by thin)
|
|
|-
|
|
^- [(map atom xkey) xtable]
|
|
?~ list [thick st]
|
|
=/ item=(unit xkey) (~(get by thick) p.i.list)
|
|
=^ merged=xkey st ?~ item [q.i.list st]
|
|
(merge st u.item q.i.list)
|
|
=/ new-thick (~(put by thick) p.i.list merged)
|
|
$(list t.list, thick new-thick)
|
|
::
|
|
:: Create a new xray that is the union of two xrays, but with a
|
|
:: coherent `xrole` (where possible, otherwise a %misjunction).
|
|
::
|
|
:: This often needs to restructure things. For example, if we are
|
|
:: combining `[[~ ~] [%a ~]]` and `[[~ ~] [%b ~]]`, we should produce
|
|
:: `[[~ ~] ?%([%a ~] [%b ~])]`.
|
|
::
|
|
:: This is a massive switch on the xroles of the two arguments. This
|
|
:: is *very* easy to get wrong, so I structured things this in a
|
|
:: verbose and explicit way, so that you should be able to easily go
|
|
:: through each case and verify that it's doing the right thing.
|
|
::
|
|
++ combine
|
|
|^ |= [st=xtable =this=xkey =that=xkey]
|
|
^- [xkey xtable]
|
|
::
|
|
?: =(this-xkey that-xkey) [this-xkey st]
|
|
::
|
|
=^ this-xrole=xrole st (xray-xrole st this-xkey)
|
|
=^ that-xrole=xrole st (xray-xrole st that-xkey)
|
|
::
|
|
=/ this=[=xkey =xrole] [this-xkey this-xrole]
|
|
=/ that=[=xkey =xrole] [that-xkey that-xrole]
|
|
::
|
|
?: ?=(%void xrole.this) [that-xkey st]
|
|
?: ?=(%void xrole.that) [this-xkey st]
|
|
?: ?=(%noun xrole.this) (noun-noun st this that)
|
|
?: ?=(%noun xrole.that) (noun-noun st that this)
|
|
?: ?=([%misjunction *] xrole.this) (misjunkin st this that)
|
|
?: ?=([%misjunction *] xrole.that) (misjunkin st this that)
|
|
::
|
|
?- xrole.that
|
|
%atom
|
|
?- xrole.this
|
|
%atom (atom-atom st that this)
|
|
%tall (atom-cell st that this)
|
|
%wide (atom-cell st that this)
|
|
[%constant *] (atom-atom st that this)
|
|
[%instance *] (atom-cell st that this)
|
|
[%option *] (atom-optn st that this)
|
|
[%union *] (atom-cell st that this)
|
|
[%junction *] (atom-junc st that this)
|
|
[%conjunction *] (atom-cell st that this)
|
|
==
|
|
%tall
|
|
?- xrole.this
|
|
%atom (atom-cell st this that)
|
|
%tall (tall-tall st this that)
|
|
%wide (wide-tall st this that)
|
|
[%constant *] (atom-cell st this that)
|
|
[%instance *] (tall-tall st this that)
|
|
[%option *] (atom-cell st this that)
|
|
[%union *] (tall-tall st this that)
|
|
[%junction *] (cell-junc st that this)
|
|
[%conjunction *] (tall-conj st that this)
|
|
==
|
|
%wide
|
|
?- xrole.this
|
|
%atom (atom-cell st this that)
|
|
%tall (wide-tall st that this)
|
|
%wide (wide-wide st this that)
|
|
[%constant *] (atom-cell st this that)
|
|
[%instance *] (wide-tall st this that)
|
|
[%option *] (atom-cell st this that)
|
|
[%union *] (wide-tall st that this)
|
|
[%junction *] (cell-junc st that this)
|
|
[%conjunction *] (wide-conj st that this)
|
|
==
|
|
[%constant *]
|
|
?- xrole.this
|
|
%atom (atom-atom st that this)
|
|
%tall (atom-cell st that this)
|
|
%wide (atom-cell st that this)
|
|
[%constant *] (cnst-cnst st that this)
|
|
[%instance *] (atom-cell st that this)
|
|
[%option *] (cnst-optn st that this)
|
|
[%union *] (atom-cell st that this)
|
|
[%junction *] (atom-junc st that this)
|
|
[%conjunction *] (atom-cell st that this)
|
|
==
|
|
[%instance *]
|
|
?- xrole.this
|
|
%atom (atom-cell st this that)
|
|
%tall (tall-tall st this that)
|
|
%wide (wide-tall st this that)
|
|
[%constant *] (atom-cell st this that)
|
|
[%instance *] (inst-inst st this that)
|
|
[%option *] (atom-cell st this that)
|
|
[%union *] (inst-unin st that this)
|
|
[%junction *] (cell-junc st that this)
|
|
[%conjunction *] (tall-conj st that this)
|
|
==
|
|
[%option *]
|
|
?- xrole.this
|
|
%atom (atom-optn st this that)
|
|
%tall (atom-cell st that this)
|
|
%wide (atom-cell st that this)
|
|
[%constant *] (cnst-optn st this that)
|
|
[%instance *] (atom-cell st that this)
|
|
[%option *] (optn-optn st this that)
|
|
[%union *] (atom-cell st that this)
|
|
[%junction *] (atom-junc st that this)
|
|
[%conjunction *] (atom-cell st that this)
|
|
==
|
|
[%union *]
|
|
?- xrole.this
|
|
%atom (atom-cell st this that)
|
|
%tall (tall-tall st this that)
|
|
%wide (wide-tall st this that)
|
|
[%constant *] (atom-cell st this that)
|
|
[%instance *] (inst-unin st this that)
|
|
[%option *] (atom-cell st this that)
|
|
[%union *] (unin-unin st this that)
|
|
[%junction *] (cell-junc st that this)
|
|
[%conjunction *] (tall-conj st that this)
|
|
==
|
|
[%junction *]
|
|
?- xrole.this
|
|
%atom (atom-junc st this that)
|
|
%tall (cell-junc st this that)
|
|
%wide (cell-junc st this that)
|
|
[%constant *] (atom-junc st this that)
|
|
[%instance *] (cell-junc st this that)
|
|
[%option *] (atom-junc st this that)
|
|
[%union *] (cell-junc st this that)
|
|
[%junction *] (junc-junc st this that)
|
|
[%conjunction *] (cell-junc st this that)
|
|
==
|
|
[%conjunction *]
|
|
?- xrole.this
|
|
%atom (atom-cell st this that)
|
|
%tall (tall-conj st this that)
|
|
%wide (wide-conj st this that)
|
|
[%constant *] (atom-cell st this that)
|
|
[%instance *] (tall-conj st this that)
|
|
[%option *] (atom-cell st this that)
|
|
[%union *] (tall-conj st this that)
|
|
[%junction *] (cell-junc st that this)
|
|
[%conjunction *] (conj-conj st this that)
|
|
==
|
|
==
|
|
::
|
|
:: This guy ACTUALLY constructs the union type by calling `fork`
|
|
:: from `hoon.hoon`. To populate the `xdat` field, we just call
|
|
:: `xray-branches` on both of the input xrays and union the result.
|
|
::
|
|
:: Node that `xray-branches` produces a singleton set when called on
|
|
:: a node that isn't a fork, so this works correctly both for
|
|
:: joining fork node and non-fork nodes.
|
|
::
|
|
++ join
|
|
|= [st=xtable this=xkey that=xkey]
|
|
^- [xkey xtable]
|
|
::
|
|
?: =(this that) [this st]
|
|
::
|
|
=/ this-xray=xray (focus-on st this)
|
|
=/ that-xray=xray (focus-on st that)
|
|
::
|
|
=/ union-type=type (fork ~[type.this-xray type.that-xray])
|
|
::
|
|
=/ this-fork (xray-branches st this)
|
|
=/ that-fork (xray-branches st that)
|
|
=/ branches (~(uni in this-fork) that-fork)
|
|
::
|
|
(alloc-fork-xray st union-type [%fork branches])
|
|
::
|
|
:: Create the join of two xrays with the specified `xrole`.
|
|
::
|
|
++ joint
|
|
|= [st=xtable x=xkey y=xkey =xrole]
|
|
^- [xkey xtable]
|
|
::
|
|
=^ joined=xkey st (join st x y)
|
|
=/ jray (focus-on st joined)
|
|
=. st (replace-xray st jray(xrole `xrole))
|
|
[xkey.jray st]
|
|
::
|
|
++ atom-atom :: Can't discriminate
|
|
|= [st=xtable [x=xkey xrole] [y=xkey xrole]]
|
|
(joint st x y [%misjunction x y])
|
|
::
|
|
++ atom-cell
|
|
|= [st=xtable [a=xkey xrole] [c=xkey xrole]]
|
|
(joint st a c [%junction a c])
|
|
::
|
|
++ wide-tall
|
|
|= [st=xtable [w=xkey xrole] [t=xkey xrole]]
|
|
(joint st w t [%conjunction w t])
|
|
::
|
|
++ noun-noun :: Can't discriminate
|
|
|= [st=xtable [x=xkey xrole] [y=xkey xrole]]
|
|
(joint st x y [%misjunction x y])
|
|
::
|
|
++ misjunkin
|
|
|= [st=xtable [x=xkey xrole] [y=xkey xrole]]
|
|
(joint st x y [%misjunction x y])
|
|
::
|
|
++ atom-optn :: Can't discriminate
|
|
|= [st=xtable [x=xkey xrole] [y=xkey [%option *]]]
|
|
(joint st x y [%misjunction x y])
|
|
::
|
|
++ cnst-optn
|
|
|= $: st=xtable
|
|
[x=xkey [%constant xv=atom]]
|
|
[y=xkey [%option ym=(map atom xkey)]]
|
|
==
|
|
=^ res st (collate-option st [[xv x] ~ ~] ym)
|
|
(joint st x y [%option res])
|
|
::
|
|
:: XX If the have the same xkey, produce a new instance who's tail
|
|
:: is the union of both tails.
|
|
::
|
|
++ inst-inst
|
|
|= $: st=xtable
|
|
[x=xkey [%instance xv=atom]]
|
|
[y=xkey [%instance yv=atom]]
|
|
==
|
|
=^ res st (collate-union st [[xv x] ~ ~] [[yv y] ~ ~])
|
|
(joint st x y [%union res])
|
|
::
|
|
++ inst-unin
|
|
|= $: st=xtable
|
|
[x=xkey [%instance xv=atom]]
|
|
[y=xkey [%union ym=(map atom xkey)]]
|
|
==
|
|
=^ res st (collate-union st [[xv x] ~ ~] ym)
|
|
(joint st x y [%union res])
|
|
::
|
|
++ junc-junc
|
|
|= $: st=xtable
|
|
[x=xkey [%junction xflat=xkey xdeep=xkey]]
|
|
[y=xkey [%junction yflat=xkey ydeep=xkey]]
|
|
==
|
|
=^ flat st (merge st xflat yflat)
|
|
=^ deep st (merge st xdeep ydeep)
|
|
(joint st x y [%junction flat deep])
|
|
::
|
|
:: XX Justify why this is always a misjunction. What if they have
|
|
:: the same head? Wouldn't producing a wide with that head and the
|
|
:: union of the two tails be coherent?
|
|
::
|
|
:: I *can* get the head and the tail of both and merge them,
|
|
:: why would this never make sense?
|
|
::
|
|
++ tall-tall
|
|
|= [st=xtable [x=xkey xrole] [y=xkey xrole]]
|
|
(joint st x y [%misjunction x y])
|
|
::
|
|
++ unin-unin
|
|
|= $: st=xtable
|
|
[x=xkey [%union xm=(map atom xkey)]]
|
|
[y=xkey [%union ym=(map atom xkey)]]
|
|
==
|
|
=^ res st (collate-union st xm ym)
|
|
(joint st x y [%union res])
|
|
::
|
|
:: XX Can this ever produce a coherent result? If it can't, should
|
|
:: the result be a misjunction, or should the misjunction instead
|
|
:: exist in the wide part of the resulting conjunction (what this
|
|
:: code will do)?
|
|
::
|
|
++ wide-conj
|
|
|= $: st=xtable
|
|
[x=xkey xrole]
|
|
[y=xkey [%conjunction ywide=xkey ytall=xkey]]
|
|
==
|
|
=^ new-wide st (merge st x ywide)
|
|
(joint st x y [%conjunction new-wide ytall])
|
|
::
|
|
:: XX Justify why this is always a misjunction. What if they have
|
|
:: the same head? Wouldn't producing a wide with that head and the
|
|
:: union of the two tails be coherent?
|
|
::
|
|
:: I *can* get the head and the tail and merge
|
|
:: them, why would this never make sense?
|
|
::
|
|
++ wide-wide
|
|
|= [st=xtable [x=xkey xrole] [y=xkey xrole]]
|
|
(joint st x y [%misjunction x y])
|
|
::
|
|
++ cnst-cnst
|
|
|= $: st=xtable
|
|
[x=xkey [%constant xv=atom]]
|
|
[y=xkey [%constant yv=atom]]
|
|
==
|
|
=^ res st (collate-option st [[xv x] ~ ~] [[yv y] ~ ~])
|
|
(joint st x y [%option res])
|
|
::
|
|
++ optn-optn
|
|
|= $: st=xtable
|
|
[x=xkey [%option xm=(map atom xkey)]]
|
|
[y=xkey [%option ym=(map atom xkey)]]
|
|
==
|
|
=^ res st (collate-option st xm ym)
|
|
(joint st x y [%option res])
|
|
::
|
|
++ tall-conj
|
|
|= $: st=xtable
|
|
[x=xkey xrole]
|
|
[y=xkey [%conjunction ywide=xkey ytall=xkey]]
|
|
==
|
|
=^ new-tall st (merge st x ytall)
|
|
(joint st ywide new-tall [%conjunction ywide new-tall])
|
|
::
|
|
++ atom-junc
|
|
|= $: st=xtable
|
|
[x=xkey xrole]
|
|
[y=xkey [%junction yflat=xkey ydeep=xkey]]
|
|
==
|
|
=^ flat-merged st (merge st x yflat)
|
|
(joint st flat-merged ydeep [%junction flat-merged ydeep])
|
|
::
|
|
++ cell-junc
|
|
|= $: st=xtable
|
|
[x=xkey xrole]
|
|
[y=xkey [%junction yflat=xkey ydeep=xkey]]
|
|
==
|
|
=^ deep-merged st (merge st x ydeep)
|
|
(joint st yflat deep-merged [%junction yflat deep-merged])
|
|
::
|
|
++ conj-conj
|
|
|= $: st=xtable
|
|
[x=xkey [%conjunction xwide=xkey xtall=xkey]]
|
|
[y=xkey [%conjunction ywide=xkey ytall=xkey]]
|
|
==
|
|
=^ new-wide st (merge st xwide ywide)
|
|
=^ new-tall st (merge st xtall ytall)
|
|
(joint st new-wide new-tall [%conjunction new-wide new-tall])
|
|
::
|
|
--
|
|
--
|
|
::
|
|
:: Convert an `ximage` to a spec for printing.
|
|
::
|
|
++ ximage-to-spec
|
|
|= [=top=xkey img=xtable]
|
|
^- spec
|
|
::
|
|
|^ (xray-to-spec ~ top-xkey)
|
|
::
|
|
+$ trace (set xkey)
|
|
::
|
|
++ xray-to-spec
|
|
|= [tr=trace i=xkey]
|
|
^- spec
|
|
=/ x=xray (focus-on img i)
|
|
=/ d=xdat (need xdat.x)
|
|
?: (~(has in tr) i) [%loop (synthetic i)]
|
|
?^ recipes.x (recipe-to-spec tr n.recipes.x)
|
|
%+ wrap-with-loop-binding x
|
|
=. tr (~(put in tr) i)
|
|
^- spec
|
|
?@ d [%base d]
|
|
?- -.d
|
|
%atom ?~ constant.d [%base %atom aura.d]
|
|
?: &(=(%n aura.d) =(`@`0 u.constant.d)) [%base %null]
|
|
[%leaf aura.d u.constant.d]
|
|
%cell =/ hd `spec`$(i head.d)
|
|
=/ tl `spec`$(i tail.d)
|
|
=/ both-basic &(=([%base %noun] hd) =([%base %noun] tl))
|
|
?: both-basic [%base %cell]
|
|
?: ?=(%bccl -.tl) [%bccl hd +.tl]
|
|
[%bccl hd tl ~]
|
|
%core =/ payld $(i xray.d)
|
|
=/ batt ^- (map term spec)
|
|
%- ~(run by (flatten-battery batt.d))
|
|
|= =xkey ^$(i xkey)
|
|
?- r.garb.d
|
|
%lead [%bczp payld batt]
|
|
%gold [%bcdt payld batt]
|
|
%zinc [%bctc payld batt]
|
|
%iron [%bcfs payld batt]
|
|
==
|
|
%pntr !!
|
|
%face =/ =spec $(i xray.d)
|
|
?^(face.d spec [%bcts face.d spec])
|
|
%fork =/ =xrole (need xrole.x)
|
|
|^ ?+ xrole
|
|
~& [%unexpected-fork-xrole xkey.x d xrole choices]
|
|
[%bcwt choices]
|
|
%noun [%base %noun]
|
|
%void [%base %void]
|
|
[%option *] [%bcwt choices]
|
|
[%union *] [%bccn choices]
|
|
[%misjunction *] [%bcwt choices]
|
|
[%junction *] :+ %bcpt
|
|
^$(i flat.xrole)
|
|
^$(i deep.xrole)
|
|
[%conjunction *] :+ %bckt
|
|
^$(i wide.xrole)
|
|
^$(i tall.xrole)
|
|
==
|
|
::
|
|
++ choices
|
|
^- [i=spec t=(list spec)]
|
|
=- ?>(?=(^ -) -)
|
|
(turn ~(tap in set.d) |=(=xkey ^^$(i xkey)))
|
|
--
|
|
==
|
|
::
|
|
:: If this xray references itself, generate a $$ binding in the output
|
|
:: spec, and then we can just reference ourselves by name.
|
|
::
|
|
++ wrap-with-loop-binding
|
|
|= [xr=xray sp=spec]
|
|
^- spec
|
|
?. (need loop.xr) sp
|
|
=/ nm (synthetic xkey.xr)
|
|
[%bcbc [%loop nm] [[nm sp] ~ ~]]
|
|
::
|
|
:: If we have a `recipe`, we can generate much nicer output.
|
|
::
|
|
++ recipe-to-spec
|
|
|= [tr=trace r=recipe]
|
|
^- spec
|
|
?- -.r
|
|
%direct [%like [term.r ~] ~]
|
|
%synthetic =/ subs %+ turn list.r
|
|
|= =xkey (xray-to-spec tr xkey)
|
|
[%make [%limb term.r] subs]
|
|
==
|
|
::
|
|
:: Generate symbols to be used for loop references.
|
|
::
|
|
:: given a small atom (:number), construct a coresponding symbol
|
|
:: using the Hebrew alphabet.
|
|
::
|
|
++ synthetic
|
|
|= number=@ud
|
|
^- @tas
|
|
=/ alf=(list term)
|
|
^~ :~ %alf %bet %gim %dal %hej %vav %zay %het
|
|
%tet %yod %kaf %lam %mem %nun %sam %ayn
|
|
%pej %sad %qof %res %sin %tav
|
|
==
|
|
?: (lth number 22)
|
|
(snag number alf)
|
|
(cat 3 (snag (mod number 22) alf) $(number (div number 22)))
|
|
::
|
|
:: Batteries in a `spec` do not have chapters, so we just ignore
|
|
:: the chapters and flatten the whole battery down to `(map term xkey)`.
|
|
::
|
|
++ flatten-battery
|
|
|= batt=(batt-of xkey)
|
|
^- (map term xkey)
|
|
=/ chapters ~(tap by batt)
|
|
|- ^- (map term xkey)
|
|
?~ chapters ~
|
|
(~(uni by q.q.i.chapters) $(chapters t.chapters))
|
|
::
|
|
--
|
|
::
|
|
:: Left-fold over a list.
|
|
::
|
|
:: This is `roll`, but with explicit type parameters.
|
|
::
|
|
++ fold
|
|
|* [state=mold elem=mold]
|
|
|= [[st=state xs=(list elem)] f=$-([state elem] state)]
|
|
^- state
|
|
|-
|
|
?~ xs st
|
|
$(xs t.xs, st (f st i.xs))
|
|
::
|
|
:: This is basically a `mapM` over a list using the State monad.
|
|
::
|
|
:: Another way to think about this is that it is the same as `turn`,
|
|
:: except that a state variable `st` is threaded through the
|
|
:: execution. The list is processed from left to right.
|
|
::
|
|
:: This is `spin`, but with explicit type parameters.
|
|
::
|
|
++ traverse
|
|
|* [state=mold in=mold out=mold]
|
|
|= [[st=state xs=(list in)] f=$-([state in] [out state])]
|
|
^- [(list out) state]
|
|
?~ xs [~ st]
|
|
=^ r st (f st i.xs)
|
|
=^ rs st $(xs t.xs, st st)
|
|
[[r rs] st]
|
|
::
|
|
:: `traverse` over a set.
|
|
::
|
|
++ traverse-set
|
|
|* [state=mold input=mold out=mold]
|
|
|= [[st=state xs=(set input)] f=$-([state input] [out state])]
|
|
^- [(set out) state]
|
|
::
|
|
=^ elems st ((traverse state input out) [st ~(tap in xs)] f)
|
|
:_ st (~(gas in *(set out)) elems)
|
|
::
|
|
:: `traverse` over a map, also passing the key to the folding function.
|
|
::
|
|
++ traverse-map
|
|
|* [state=mold key=mold in=mold out=mold]
|
|
|= [[st=state dict=(map key in)] f=$-([state key in] [out state])]
|
|
^- [(map key out) state]
|
|
::
|
|
=^ pairs=(list (pair key out)) st
|
|
%+ (traverse state (pair key in) (pair key out))
|
|
[st ~(tap by dict)]
|
|
|= [st=state k=key x=in]
|
|
^- [(pair key out) state]
|
|
=^ v st (f st k x)
|
|
[[k v] st]
|
|
::
|
|
:_ st
|
|
(~(gas by *(map key out)) pairs)
|
|
::
|
|
:: Given a map, return its inverse: For each value, what are the set
|
|
:: of associated keys?
|
|
::
|
|
++ reverse-map
|
|
|* [key=mold val=mold]
|
|
|= tbl=(map key val)
|
|
=/ init *(map val (set key))
|
|
^- _init
|
|
%+ (fold _init (pair key val))
|
|
[init ~(tap by tbl)]
|
|
|= [acc=_init k=key v=val]
|
|
^- _init
|
|
=/ mb-keys (~(get by acc) v)
|
|
=/ keys=(set key) ?~(mb-keys ~ u.mb-keys)
|
|
(~(put by acc) v (~(put in keys) k))
|
|
--
|