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729 lines
22 KiB
Plaintext
729 lines
22 KiB
Plaintext
::
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:::: hoon/cram/gen
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::
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:: test generator for the cram markdown syntax
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::
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:: todo: integrate with ++sail and embed in hoon compiler
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::
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:: ++cram is a simple markdown-inspired parser that makes
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:: common html tropes easy to type. you can think of ++cram
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:: as "rational markdown" or "markdown with syntax errors."
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:: a document format should be easy to type and read, but
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:: that doesn't mean it can't or have rigorous syntax.
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::
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:: tldr: ++cram is indent-oriented. indent 2 spaces for
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:: a dynamic interpolation, 4 spaces for example code, 6
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:: spaces for a blockquote and 8 spaces for verse. separate
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:: every semantic block by a blank line. use - for
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:: unordered lists, + for ordered lists.
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::
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:: markdown link syntax works. * means bold, _ means
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:: italics, "" inserts smart quotes. all enclosed
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:: strings are reparsed; escape the terminator within
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:: the string, eg, *star \* in bold text*.
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::
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:: markdown `literal` syntax is supported, but all hoon
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:: constants are automatically marked as code. also, any
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:: hoon expression prefixed with # is a code literal.
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::
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:: (++cram is a valid hoon parsing rule, but it does a lot
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:: of custom processing internally, since the language is
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:: context-sensitive. we use a context-sensitive parser
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:: to cut the lines into blocks, then reparse flow blocks
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:: with normal hoon rules. multipass parsing is the tax
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:: humans have to pay for simple but human-friendly syntax.)
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::
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|%
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++ dynamic
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|%
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++ mane $@(@tas {@tas @tas}) :: XML name+space
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++ manx {g/marx c/marl} :: XML node
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++ marl (list $^(manx tuna)) :: XML node list
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++ mart (list {n/mane v/(list beer)}) :: XML attributes
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++ marx {n/mane a/mart} :: XML tag
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++ tuna {?($tape $manx $marl $call) p/twig}
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--
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::
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++ freeze
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|= manx:dynamic ^- manx
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:- [n.g (turn a.g freeze-mart)]
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%+ turn c
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|=(a/=>(dynamic $^(manx tuna)) ?@(-.a !! (freeze a)))
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::
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++ freeze-mart
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|= {n/mane v/(list beer)} ^- {mane tape}
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[n (turn v |=(a/beer ?^(a !! a)))]
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::
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::+|
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::
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++ steam
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|= manx:dynamic ^- twig:manx
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:- [(steam-mane n.g) %conl (turn a.g steam-mart)]
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|- ^- twig:marl
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?~ c [%conl ~]
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?- -.i.c
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^ [(steam i.c) $(c t.c)]
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$manx [p.i.c $(c t.c)]
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$tape [[%nub p.i.c] $(c t.c)]
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$call [%call p.i.c [$(c t.c)]~]
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$marl [%per [p.i.c $(c t.c)] cons-twig]
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==
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::
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++ cons-twig ^- twig
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!,(*twig =>([a b]=. |-(?~(a b [-.a $(a +.a)]))))
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:::+ %per [%name 2+[%a %b] $+1] :: => [a b]=.
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:::* %loop :: |-
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:: %ifno /a wing+/b :: ?~ a b
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:: [wing+/[&+2]/a make+[/[%$] [/a /[&+3]/a]~]] :: [-.a $(a +.a)]
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::==
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::
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++ steam-mane
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|= a/mane ^- twig
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?@(a [%rock %tas a] [[%rock %tas -.a] [%rock %tas +.a]])
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::
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++ steam-mart
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|= {n/mane v/(list beer)}
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[(steam-mane n) %knit v]
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--
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|= pax/path
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=< (test pax)
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=> |%
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++ item (pair mite (list flow)) :: xml node generator
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++ colm @ud :: column
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++ flow manx :: node or generator
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++ mite :: context
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$? $down :: outer embed
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$list :: unordered list
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$lime :: list item
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$lord :: ordered list
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$poem :: verse
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$bloc :: blockquote
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$code :: preformatted code
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$head :: heading
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$expr :: dynamic expression
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== ::
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++ trig :: line style
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$: col/@ud :: start column
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$= sty :: style
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$? $fini :: terminator
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$done :: end of input
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$lint :: + line item
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$lite :: - line item
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$head :: # heading
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$text :: anything else
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== == ::
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++ graf :: input fragment
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$% {$bold p/(list graf)} :: *bold*
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{$talc p/(list graf)} :: _italics_
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{$quod p/(list graf)} :: "double quote"
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{$code p/tape} :: code literal
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{$text p/tape} :: text symbol
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{$link p/(list graf) q/tape} :: URL
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==
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--
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|% ::
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++ test :: test text parsing
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|= pax/path
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^- tape
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:: src: text file as (list cord)
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:: txt: source as tape with newlines
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:: vex: parsing result
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::
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=/ src .^(wain %cx pax)
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=* txt (zing (turn src |=(@t (weld (rip 3 +<) `tape`~[`@`10]))))
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=/ vex (cram [1 1] txt)
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:: print result as error or xml text
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::
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?~ q.vex
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"syntax error: line {(scow %ud p.p.vex)}, column {(scow %ud q.p.vex)}"
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(poxo ;;(manx q:(slap !>(~) (steam p.u.q.vex))))
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:: ::
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++ cram :: parse unmark
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|= {naz/hair los/tape}
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^- (like flow)
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::
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:: state of the parsing loop. we maintain a construction
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:: stack for elements and a line stack for lines in the
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:: current block. a blank line causes the current block
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:: to be parsed and thrown in the current element. when
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:: the indent column retreats, the element stack rolls up.
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::
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:: err: error position
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:: col: current control column
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:: hac: stack of items under construction
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:: cur: current item under construction
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:: lub: current block being read in
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::
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=| err/(unit hair)
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=/ col q.naz
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=| hac/(list item)
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=/ cur/item [%down ~]
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=| lub/(unit (pair hair (list tape)))
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=< $:line
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|%
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:: ::
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++ $ :: resolve
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^- (like flow)
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:: if error position is set, produce error
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::
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?. =(~ err) [+.err ~]
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:: all data was consumed
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::
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=- [naz `[- [naz los]]]
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|- ^- flow
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:: fold all the way to top
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::
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?~ hac fine
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$(..^$ fold)
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:: ::
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++ back :: column retreat
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|= luc/@ud
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^+ +>
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?: =(luc col) +>
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:: nex: next backward step that terminates this context
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::
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=/ nex/@ud
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?- p.cur
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$down 2
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$head 0
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$expr 2
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$list 0
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$lime 2
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$lord 0
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$poem 8
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$code 4
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$bloc 6
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==
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?: (gth nex (sub col luc))
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:: indenting pattern violation
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::
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..^$(col luc, err `[p.naz luc])
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=. ..^$ fold
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$(col (sub col nex))
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:: ::
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++ fine :: item to flow
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^- flow
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?: ?=($head p.cur)
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?> ?=({* $~} q.cur)
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i.q.cur
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=- [[- ~] (flop q.cur)]
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?+ p.cur !!
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$down %div
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$list %ul
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$lord %ol
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$lime %li
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$bloc %bq
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$code %pre
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==
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:: ::
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++ fold ^+ . :: complete and pop
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?~ hac .
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%= .
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hac t.hac
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cur [p.i.hac [fine q.i.hac]]
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==
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:: ::
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++ snap :: capture raw line
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=| nap/tape
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|- ^+ [nap +>]
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:: no unterminated lines
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::
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?~ los [~ +>(err `naz)]
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?: =(`@`10 i.los)
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:: consume newline
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::
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:_ +>(los t.los, naz [+(p.naz) 1])
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:: trim trailing spaces
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::
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|- ^- tape
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?: ?=({$' ' *} nap)
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$(nap t.nap)
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(flop nap)
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:: save byte and repeat
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::
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$(los t.los, q.naz +(q.naz), nap [i.los nap])
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:: ::
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++ skip +:snap :: discard line
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++ look :: inspect line
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^- (unit trig)
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?~ los
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`[q.naz %done]
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?: =(`@`10 i.los)
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~
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?: =(' ' i.los)
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look(los t.los, q.naz +(q.naz))
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:+ ~ q.naz
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?: =('\\' i.los)
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%fini
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?: ?& =('#' i.los)
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|- ^- ?
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?~ t.los |
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?: =(' ' i.t.los) &
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?: =('#' i.t.los) $(t.los t.t.los)
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==
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%head
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?: ?=({$'-' $' ' *} los)
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%lite
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?: ?=({$'+' $' ' *} los)
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%lint
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%text
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:: ::
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++ cape :: xml-escape
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::FIXME p sure this is redundant with native manx escaping
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|= tex/tape
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^- tape
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?~ tex tex
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=+ $(tex t.tex)
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?+ i.tex [i.tex -]
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$34 ['&' 'q' 'u' 'o' 't' ';' -]
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$38 ['&' 'a' 'm' 'p' ';' -]
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$39 ['&' 'a' 'p' 'o' 's' ';' -]
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$60 ['&' 'l' 't' ';' -]
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$62 ['&' 'g' 't' ';' -]
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==
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:: ::
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++ clue :: tape to xml
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|= tex/tape
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^- manx
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[[%$ [%$ tex] ~] ~]
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:: ::
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++ cash :: escaped fence
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|* tem/rule
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;~ sfix
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%- star
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=+ ;~(pose bas tem)
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;~ pose
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(cold ' ' whit)
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;~(pose ;~(less - prn) ;~(pfix bas -))
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==
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::
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tem
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==
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:: ::
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++ cool :: reparse
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|* $: :: fex: primary parser
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:: sab: secondary parser
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::
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fex/rule
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sab/rule
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==
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|= {naz/hair los/tape}
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^+ *sab
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::
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:: vex: fenced span
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::
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=/ vex/(like tape) (fex naz los)
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?~ q.vex vex
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::
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:: hav: reparse full fenced text
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::
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=/ hav ((full sab) [naz p.u.q.vex])
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::
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:: reparsed error position is always at start
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::
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?~ q.hav [naz ~]
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::
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:: the complete span with the main product
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::
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:- p.vex
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`[p.u.q.hav q.u.q.vex]
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:: ::
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++ echo :: hoon literal
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|* sab/rule
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|= {naz/hair los/tape}
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^- (like tape)
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:: vex: result of parsing wide twig
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::
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=/ vex (sab naz los)
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:: use result of expression parser
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::
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?~ q.vex vex
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=- [p.vex `[- q.u.q.vex]]
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:: but replace payload with bytes consumed
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::
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|- ^- tape
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?: =(q.q.u.q.vex los) ~
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?~ los ~
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[i.los $(los +.los)]
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:: ::
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++ word :: flow parser
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%+ knee *(list graf) |. ~+
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;~ pose
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::
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:: whitespace
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::
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(cold [%text " "]~ whit)
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::
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:: ordinary word
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::
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%+ cook |=(graf [+< ~])
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(stag %text ;~(plug ;~(pose low hig) (star ;~(pose nud low hig hep))))
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::
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:: naked \escape
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::
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%+ cook |=(@ [%text [+< ~]]~)
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;~(pfix bas ;~(less ace prn))
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::
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:: *bold literal*
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::
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%+ cook |=(graf [+< ~])
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(stag %bold ;~(pfix tar (cool (cash tar) work)))
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::
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:: _italic literal_
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::
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%+ cook |=(graf [+< ~])
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(stag %talc ;~(pfix cab (cool (cash cab) work)))
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::
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:: "quoted text"
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::
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%+ cook |=(graf [+< ~])
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(stag %quod ;~(pfix doq (cool (cash doq) work)))
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::
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:: `classic markdown quote`
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::
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%+ cook |=(graf [+< ~])
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(stag %code ;~(pfix tec (cash tec)))
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::
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:: #twig
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::
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%+ cook |=(graf [+< ~])
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(stag %code ;~(pfix hax (echo wide:vast)))
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::
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:: ++arm
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::
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%+ cook |=(graf [+< ~])
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(stag %code ;~(plug lus lus low (star ;~(pose nud low hep))))
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::
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:: [arbitrary *content*](url)
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::
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%+ cook |=(graf [+< ~])
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%+ stag %link
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;~ plug
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;~(pfix sel (cool (cash ser) work))
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;~(pfix gay ;~(pfix pel (cash per)))
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==
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::
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:: direct hoon constant
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::
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%+ cook |=(graf [+< ~])
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%+ stag %code
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%- echo
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;~ pose
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bisk:so
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tash:so
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;~(pfix dot perd:so)
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;~(pfix sig ;~(pose twid:so (easy [%$ %n 0])))
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;~(pfix cen ;~(pose sym buc pam bar qut nuck:so))
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==
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::
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:: just a byte
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::
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(cook |=(@ [%text [+< ~]]~) ;~(less ace prn))
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==
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:: ::
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++ work :: indefinite flow
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%+ cook
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|=((list (list graf)) (zing +<))
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(star word)
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:: ::
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++ down :: parse inline flow
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%+ knee *(list manx) |. ~+
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=- (cook - work)
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:: collect raw flow into xml tags
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::
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|= gaf/(list graf)
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^- (list manx)
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:: nap: collected words
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:: max: collected tags
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::
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=< main
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|%
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++ main
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^- marl
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?~ gaf ~
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?. ?=($text -.i.gaf)
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(weld (item i.gaf) $(gaf t.gaf))
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::
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:: fip: accumulate text blocks
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=/ fip/(list tape) [p.i.gaf]~
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|- ^- marl
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?~ t.gaf [;/((zing (flop fip))) ~]
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?. ?=($text -.i.t.gaf)
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[;/((zing (flop fip))) ^$(gaf t.gaf)]
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$(gaf t.gaf, fip :_(fip p.i.t.gaf))
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::
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++ item
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|= nex/graf
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^- (list manx)
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?- -.nex
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$text !! :: handled separately
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$bold [[%b ~] ^$(gaf p.nex)]~
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$talc [[%i ~] ^$(gaf p.nex)]~
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$code [[%code ~] ;/((cape p.nex)) ~]~
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$quod :: smart quotes
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::
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%= ^$
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gaf
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:- [%text (tufa ~-~201c. ~)]
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%+ weld p.nex
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`(list graf)`[%text (tufa ~-~201d. ~)]~
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==
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$link [[%a [%href (cape q.nex)] ~] ^$(gaf p.nex)]~
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==
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--
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:: ::
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++ para :: paragraph
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%+ cook
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|=((list manx) [[%p ~] +<]~)
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;~(pfix gay down) ::REVIEW does this mean comments work?
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:: ::
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++ whit :: whitespace
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(cold ' ' (plus ;~(pose (just ' ') (just `@`10))))
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::
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++ head :: parse heading
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%+ cook
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|= a/manx ^- marl
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=. a.g.a :_(a.g.a [%id (sanitize-to-id c.a)])
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[a]~
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::
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;~ plug
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::
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:: # -> 1 -> %h1, ### -> 3 -> %h3, etc
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:(cook |=(a/@u /(crip "h{<a>}")) lent (stun [1 6] hax))
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::
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;~(pfix whit down)
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==
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:: ::
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++ sanitize-to-id
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|= a/(list manx) ^- tape
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=- %- zing
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%+ turn `(list tape)`(flop -)
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|= tape ^- tape
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%+ turn `tape`+<
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|= @tD
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^- @tD
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?: ?| &((gte +< 'a') (lte +< 'z'))
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&((gte +< '0') (lte +< '9'))
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==
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+<
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?: &((gte +< 'A') (lte +< 'Z'))
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(add 32 +<)
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'-'
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:: collect all text in header flow
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::
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=| ges/(list tape)
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|- ^- (list tape)
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?~ a ges
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%= $
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a t.a
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ges
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?: ?=({{$$ {$$ *} $~} $~} i.a)
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:: capture text
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::
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[v.i.a.g.i.a ges]
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:: descend into children
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::
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$(a c.i.a)
|
|
==
|
|
:: ::
|
|
++ made :: compose block
|
|
^+ .
|
|
:: empty block, no action
|
|
::
|
|
?~ lub .
|
|
:: if block is preformatted code
|
|
::
|
|
?: ?=($code p.cur)
|
|
:: add blank line between blocks
|
|
::
|
|
=. q.cur
|
|
?~ q.cur q.cur
|
|
:_(q.cur ;/("\0a"))
|
|
%= .
|
|
q.cur
|
|
%+ weld
|
|
%+ turn
|
|
q.u.lub
|
|
|= tape ^- flow
|
|
:: each line is text data with its newline
|
|
::
|
|
;/((weld (slag (dec col) +<) "\0a"))
|
|
q.cur
|
|
==
|
|
:: if block is verse
|
|
::
|
|
?: ?=($poem p.cur)
|
|
:: add break between stanzas
|
|
::
|
|
=. q.cur ?~(q.cur q.cur [[[%br ~] ~] q.cur])
|
|
%= .
|
|
q.cur
|
|
%+ weld
|
|
%+ turn
|
|
q.u.lub
|
|
|= tape ^- flow
|
|
:: each line is a paragraph
|
|
::
|
|
:- [%p ~]
|
|
:_ ~
|
|
;/((weld (slag (dec col) +<) "\0a"))
|
|
q.cur
|
|
==
|
|
:: yex: block recomposed, with newlines
|
|
::
|
|
=/ yex/tape
|
|
=/ hel (flop q.u.lub)
|
|
|- ^- tape
|
|
?~ hel ~
|
|
?~ t.hel i.hel
|
|
(weld i.hel `tape`[`@`10 $(hel t.hel)])
|
|
:: XX live expressions stubbed out
|
|
::
|
|
?: ?=($expr p.cur)
|
|
!!
|
|
:: vex: parse of paragraph
|
|
::
|
|
=/ vex/(like (list manx))
|
|
:: either a one-line header or a paragraph
|
|
::
|
|
%.([p.u.lub yex] ?:(?=($head p.cur) head para))
|
|
:: if error, propagate correctly
|
|
::
|
|
?~ q.vex ..$(err `p.vex)
|
|
:: finish tag if it's a header
|
|
::
|
|
=< ?. =(%head p.cur) ..$ fold
|
|
:: save good result, clear buffer
|
|
::
|
|
..$(lub ~, q.cur (weld p.u.q.vex q.cur))
|
|
:: ::
|
|
++ line ^+ . :: body line loop
|
|
:: abort after first error
|
|
::
|
|
?: !=(~ err) .
|
|
:: pic: profile of this line
|
|
::
|
|
=/ pic look
|
|
:: if line is blank
|
|
::
|
|
?~ pic
|
|
:: break section
|
|
::
|
|
line:made:skip
|
|
:: line is not blank
|
|
::
|
|
=> .(pic u.pic)
|
|
:: if end of input, complete
|
|
::
|
|
?: ?=($done sty.pic)
|
|
..$(q.naz col.pic)
|
|
:: if end marker behind current column
|
|
::
|
|
?: &(?=($fini sty.pic) (lth col.pic col))
|
|
:: retract and complete
|
|
::
|
|
(back(q.naz (add 2 col.pic)) col.pic)
|
|
:: bal: inspection copy of lub, current section
|
|
::
|
|
=/ bal lub
|
|
:: if within section
|
|
::
|
|
?^ bal
|
|
:: detect bad block structure
|
|
::
|
|
?: ?| :: only one line in a heading
|
|
::
|
|
=(%head p.cur)
|
|
?: ?=(?($code $poem $expr) p.cur)
|
|
:: literals need to end with a blank line
|
|
::
|
|
(lth col.pic col)
|
|
:: text flows must continue aligned
|
|
::
|
|
|(!=(%text sty.pic) !=(col.pic col))
|
|
==
|
|
..$(err `[p.naz col.pic])
|
|
:: accept line and continue
|
|
::
|
|
=^ nap ..$ snap
|
|
line(lub bal(q.u [nap q.u.bal]))
|
|
:: if column has retreated, adjust stack
|
|
::
|
|
=. ..$ ?. (lth col.pic col) ..$ (back col.pic)
|
|
:: dif: columns advanced
|
|
:: erp: error position
|
|
::
|
|
=/ dif (sub col.pic col)
|
|
=/ erp [p.naz col.pic]
|
|
=. col col.pic
|
|
:: nap: take first line
|
|
::
|
|
=^ nap ..$ snap
|
|
:: execute appropriate paragraph form
|
|
::
|
|
=< line:abet:apex
|
|
|%
|
|
:: ::
|
|
++ abet :: accept line
|
|
..$(lub `[naz nap ~])
|
|
:: ::
|
|
++ apex ^+ . :: by column offset
|
|
?+ dif fail
|
|
$0 apse
|
|
$2 expr
|
|
$4 code
|
|
$6 bloc
|
|
$8 poem
|
|
==
|
|
:: ::
|
|
++ apse ^+ . :: by prefix style
|
|
?- sty.pic
|
|
$fini !!
|
|
$head head
|
|
$lite lite
|
|
$lint lint
|
|
$text text
|
|
==
|
|
:: ::
|
|
++ bloc apse:(push %bloc) :: blockquote line
|
|
++ fail .(err `erp) :: set error position
|
|
++ push |=(mite %_(+> hac [cur hac], cur [+< ~])) :: push context
|
|
++ expr (push %expr) :: hoon expression
|
|
++ code (push %code) :: code literal
|
|
++ poem (push %poem) :: verse literal
|
|
++ head (push %head) :: heading
|
|
++ lent :: list entry
|
|
|= ord/?
|
|
^+ +>
|
|
:: erase list marker
|
|
::
|
|
=. nap =+(+(col) (runt [- ' '] (slag - nap)))
|
|
:: indent by 2
|
|
::
|
|
=. col (add 2 col)
|
|
:: can't switch list types
|
|
::
|
|
?: =(?:(ord %list %lord) p.cur) fail
|
|
:: push list item
|
|
::
|
|
%. %lime
|
|
=< push
|
|
:: push list context, unless we're in list
|
|
::
|
|
=+ ?:(ord %lord %list)
|
|
?: =(- p.cur) ..push (push -)
|
|
::
|
|
++ lint (lent &) :: numbered list
|
|
++ lite (lent |) :: unnumbered list
|
|
++ text :: plain text
|
|
^+ .
|
|
:: only in lists, fold
|
|
::
|
|
?. ?=(?($list $lord) p.cur) .
|
|
.($ fold)
|
|
--
|
|
--
|
|
--
|