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      • 1a: Basic Arithmetic
      • 1b: Tree Addressing
      • 1c: Molds and Mold-Builders
      • 2a: Unit Logic
      • 2b: List Logic
      • 2c: Bit Arithmetic
      • 2d: Bit Logic
      • 2e: Insecure Hashing
      • 2f: Noun Ordering
      • 2g: Unsigned Powers
      • 2h: Set Logic
      • 2i: Map Logic
      • 2j: Jar and Jug Logic
      • 2k: Queue Logic
      • 2l: Container from Container
      • 2m: Container from Noun
      • 2n: Functional Hacks
      • 2o: Normalizing Containers
      • 2p: Serialization
      • 2q: Molds and Mold-Builders
      • 3a: Modular and Signed Ints
      • 3b: Floating Point
      • 3c: Urbit Time
      • 3d: SHA Hash Family
      • 3e: AES encryption (Removed)
      • 3f: Scrambling
      • 3g: Molds and Mold-Builders
      • 4a: Exotic Bases
      • 4b: Text Processing
      • 4c: Tank Printer
      • 4d: Parsing (Tracing)
      • 4e: Parsing (Combinators)
      • 4f: Parsing (Rule-Builders)
      • 4g: Parsing (Outside Caller)
      • 4h: Parsing (ASCII Glyphs)
      • 4i: Parsing (Useful Idioms)
      • 4j: Parsing (Bases and Base Digits)
      • 4k: Atom Printing
      • 4l: Atom Parsing
      • 4m: Formatting Functions
      • 4n: Virtualization
      • 4o: Molds
      • 5a: Compiler Utilities
      • 5b: Macro Expansion
      • 5c: Compiler Backend & Prettyprinter
      • 5d: Parser
      • 5e: Molds and mold builders
      • 5f: Profiling support
      • Runes

        • Atoms and strings
        • Nock . ('dot')
        • Wild ! ('zap')
        • Change Subject = ('tis')
        • Conditionals ? ('wut')
        • Cores | ('bar')
        • Arms + ('lus')
        • Cells : ('col')
        • Calls % ('cen')
        • Casts ^ ('ket')
        • Structures $ ('buc')
        • Make ; ('mic')
        • Hints ~ ('sig')
        • Imports / ('fas')
        • Terminators -- and ==
        • Limbs and wings

          • Limbs
          • Wings
          • Zuse

            • Table of Contents
            • 2d(1-5): To JSON, Wains
            • 2d(6): From JSON
            • 2d(7): From JSON (unit)
            • 2e(2-3): Print & Parse JSON
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                                                • Advanced Types
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                                                • Standard Library

                                                  • 1a: Basic Arithmetic
                                                  • 1b: Tree Addressing
                                                  • 1c: Molds and Mold-Builders
                                                  • 2a: Unit Logic
                                                  • 2b: List Logic
                                                  • 2c: Bit Arithmetic
                                                  • 2d: Bit Logic
                                                  • 2e: Insecure Hashing
                                                  • 2f: Noun Ordering
                                                  • 2g: Unsigned Powers
                                                  • 2h: Set Logic
                                                  • 2i: Map Logic
                                                  • 2j: Jar and Jug Logic
                                                  • 2k: Queue Logic
                                                  • 2l: Container from Container
                                                  • 2m: Container from Noun
                                                  • 2n: Functional Hacks
                                                  • 2o: Normalizing Containers
                                                  • 2p: Serialization
                                                  • 2q: Molds and Mold-Builders
                                                  • 3a: Modular and Signed Ints
                                                  • 3b: Floating Point
                                                  • 3c: Urbit Time
                                                  • 3d: SHA Hash Family
                                                  • 3e: AES encryption (Removed)
                                                  • 3f: Scrambling
                                                  • 3g: Molds and Mold-Builders
                                                  • 4a: Exotic Bases
                                                  • 4b: Text Processing
                                                  • 4c: Tank Printer
                                                  • 4d: Parsing (Tracing)
                                                  • 4e: Parsing (Combinators)
                                                  • 4f: Parsing (Rule-Builders)
                                                  • 4g: Parsing (Outside Caller)
                                                  • 4h: Parsing (ASCII Glyphs)
                                                  • 4i: Parsing (Useful Idioms)
                                                  • 4j: Parsing (Bases and Base Digits)
                                                  • 4k: Atom Printing
                                                  • 4l: Atom Parsing
                                                  • 4m: Formatting Functions
                                                  • 4n: Virtualization
                                                  • 4o: Molds
                                                  • 5a: Compiler Utilities
                                                  • 5b: Macro Expansion
                                                  • 5c: Compiler Backend & Prettyprinter
                                                  • 5d: Parser
                                                  • 5e: Molds and mold builders
                                                  • 5f: Profiling support
                                                  • Runes

                                                    • Atoms and strings
                                                    • Nock . ('dot')
                                                    • Wild ! ('zap')
                                                    • Change Subject = ('tis')
                                                    • Conditionals ? ('wut')
                                                    • Cores | ('bar')
                                                    • Arms + ('lus')
                                                    • Cells : ('col')
                                                    • Calls % ('cen')
                                                    • Casts ^ ('ket')
                                                    • Structures $ ('buc')
                                                    • Make ; ('mic')
                                                    • Hints ~ ('sig')
                                                    • Imports / ('fas')
                                                    • Terminators -- and ==
                                                    • Limbs and wings

                                                      • Limbs
                                                      • Wings
                                                      • Zuse

                                                        • Table of Contents
                                                        • 2d(1-5): To JSON, Wains
                                                        • 2d(6): From JSON
                                                        • 2d(7): From JSON (unit)
                                                        • 2e(2-3): Print & Parse JSON
                                                      • Arvo

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                                                                                          Reference/Hoon/Standard Library

                                                                                          4c: Tank Printer

                                                                                          ++wash

                                                                                          Render tank at width

                                                                                          Render tac with indent tab and maximum width edg. If tac cannot be rendered in-line in less than tac characters, it will be split into multiple lines if possible. If tac cannot be made to fit, wash will crash.

                                                                                          Accepts

                                                                                          [[email protected] [email protected]] - tab is the number of characters of indentation and edge is the maximum number of characters of width.

                                                                                          tac is a tank.

                                                                                          Produces

                                                                                          A wall (list of tapes).

                                                                                          Source

                                                                                          ++ wash
                                                                                          |= [[tab=@ edg=@] tac=tank] ^- wall
                                                                                          (~(win re tac) tab edg)

                                                                                          Examples

                                                                                          > =rose `tank`[%rose [" " "[" "]"] ~['abc' 'def' 'ghi']]
                                                                                          > ((slog (crip (of-wall:format (wash [0 80] rose))) ~) ~)
                                                                                          [abc def ghi]
                                                                                          > ((slog (crip (of-wall:format (wash [0 8] rose))) ~) ~)
                                                                                          [ abc
                                                                                          def
                                                                                          ghi
                                                                                          ]
                                                                                          > ((slog (crip (of-wall:format (wash [3 15] rose))) ~) ~)
                                                                                          [ abc
                                                                                          def
                                                                                          ghi
                                                                                          ]

                                                                                          ++re

                                                                                          Pretty-printing engine

                                                                                          Container core for a pretty-printing engine that accepts a tank sample and contains arms that perform computation on it.

                                                                                          Accepts

                                                                                          tac is a tank.

                                                                                          Source

                                                                                          ++ re
                                                                                          |_ tac=tank

                                                                                          ++ram:re

                                                                                          Flatten to tape

                                                                                          Flatten tank out into a tape.

                                                                                          Accepts

                                                                                          tac is a tank, taken from sample of ++re core.

                                                                                          Produces

                                                                                          A tape.

                                                                                          Source

                                                                                          ++ ram
                                                                                          ^- tape
                                                                                          ?@ tac
                                                                                          (trip tac)
                                                                                          ?- -.tac
                                                                                          %leaf p.tac
                                                                                          ::
                                                                                          :: flat %palm rendered as %rose with welded openers
                                                                                          ::
                                                                                          %palm
                                                                                          =* mid p.p.tac
                                                                                          =* for (weld q.p.tac r.p.tac)
                                                                                          =* end s.p.tac
                                                                                          ram(tac [%rose [mid for end] q.tac])
                                                                                          ::
                                                                                          :: flat %rose rendered with open/mid/close
                                                                                          ::
                                                                                          %rose
                                                                                          =* mid p.p.tac
                                                                                          =* for q.p.tac
                                                                                          =* end r.p.tac
                                                                                          =* lit q.tac
                                                                                          %+ weld
                                                                                          for
                                                                                          |- ^- tape
                                                                                          ?~ lit
                                                                                          end
                                                                                          %+ weld
                                                                                          ram(tac i.lit)
                                                                                          =* voz $(lit t.lit)
                                                                                          ?~(t.lit voz (weld mid voz))
                                                                                          ==

                                                                                          Examples

                                                                                          > ~(ram re leaf+"foo")
                                                                                          "foo"
                                                                                          > ~(ram re [%rose [" " "[" "]"] ~['abc' 'def' 'ghi']])
                                                                                          "[abc def ghi]"

                                                                                          ++win:re

                                                                                          Render at indent

                                                                                          Render at indent level tab and width edg.

                                                                                          Accepts

                                                                                          tac is a tank, taken from sample of ++re core.

                                                                                          tab and edg are atoms.

                                                                                          Produces

                                                                                          A wall (list of tape).

                                                                                          Source

                                                                                          ++ win
                                                                                          |= [tab=@ud edg=@ud]
                                                                                          :: output stack
                                                                                          ::
                                                                                          =| lug=wall
                                                                                          |^ ^- wall
                                                                                          ?@ tac
                                                                                          (rig (trip tac))
                                                                                          ?- -.tac
                                                                                          %leaf (rig p.tac)
                                                                                          ::
                                                                                          %palm
                                                                                          =/ hom ram
                                                                                          ?: (lte (lent hom) (sub edg tab))
                                                                                          (rig hom)
                                                                                          ::
                                                                                          =* for q.p.tac
                                                                                          =* lit q.tac
                                                                                          ?~ lit
                                                                                          (rig for)
                                                                                          ?~ t.lit
                                                                                          =: tab (add 2 tab)
                                                                                          lug $(tac i.lit)
                                                                                          ==
                                                                                          (rig for)
                                                                                          ::
                                                                                          => .(lit `(list tank)`lit)
                                                                                          =/ lyn (mul 2 (lent lit))
                                                                                          =. lug
                                                                                          |- ^- wall
                                                                                          ?~ lit
                                                                                          lug
                                                                                          =/ nyl (sub lyn 2)
                                                                                          %= ^$
                                                                                          tac i.lit
                                                                                          tab (add tab nyl)
                                                                                          lug $(lit t.lit, lyn nyl)
                                                                                          ==
                                                                                          (wig for)
                                                                                          ::
                                                                                          %rose
                                                                                          =/ hom ram
                                                                                          ?: (lte (lent hom) (sub edg tab))
                                                                                          (rig hom)
                                                                                          ::
                                                                                          =* for q.p.tac
                                                                                          =* end r.p.tac
                                                                                          =* lit q.tac
                                                                                          =. lug
                                                                                          |- ^- wall
                                                                                          ?~ lit
                                                                                          ?~(end lug (rig end))
                                                                                          %= ^$
                                                                                          tac i.lit
                                                                                          tab (mod (add 2 tab) (mul 2 (div edg 3)))
                                                                                          lug $(lit t.lit)
                                                                                          ==
                                                                                          ?~(for lug (wig for))
                                                                                          ==
                                                                                          :: +rig: indent tape and cons with output stack
                                                                                          ::
                                                                                          ++ rig
                                                                                          |= hom=tape
                                                                                          ^- wall
                                                                                          [(runt [tab ' '] hom) lug]
                                                                                          :: +wig: indent tape and cons with output stack
                                                                                          ::
                                                                                          :: joined with the top line if whitespace/indentation allow
                                                                                          ::
                                                                                          ++ wig
                                                                                          |= hom=tape
                                                                                          ^- wall
                                                                                          ?~ lug
                                                                                          (rig hom)
                                                                                          =/ wug :(add 1 tab (lent hom))
                                                                                          ?. =+ mir=i.lug
                                                                                          |- ^- ?
                                                                                          ?~ mir |
                                                                                          ?| =(0 wug)
                                                                                          ?&(=(' ' i.mir) $(mir t.mir, wug (dec wug)))
                                                                                          ==
                                                                                          (rig hom) :: ^ XX regular form?
                                                                                          :_ t.lug
                                                                                          %+ runt [tab ' ']
                                                                                          (weld hom `tape`[' ' (slag wug i.lug)])
                                                                                          --

                                                                                          Examples

                                                                                          > =rose `tank`[%rose [" " "[" "]"] ~['abc' 'def' 'ghi']]
                                                                                          > ((slog (crip (of-wall:format (~(win re rose) 0 80))) ~) ~)
                                                                                          [abc def ghi]
                                                                                          > ((slog (crip (of-wall:format (~(win re rose) 3 80))) ~) ~)
                                                                                          [abc def ghi]
                                                                                          > ((slog (crip (of-wall:format (~(win re rose) 0 10))) ~) ~)
                                                                                          [ abc
                                                                                          def
                                                                                          ghi
                                                                                          ]
                                                                                          > ((slog (crip (of-wall:format (~(win re rose) 3 15))) ~) ~)
                                                                                          [ abc
                                                                                          def
                                                                                          ghi
                                                                                          ]

                                                                                          ++show

                                                                                          Pretty-printer (deprecated)

                                                                                          Pretty prints noun vem, producing a tank. This function is deprecated and in most cases produces outdated syntax or incorrect results.

                                                                                          Accepts

                                                                                          vem is a noun.

                                                                                          Produces

                                                                                          A tank.

                                                                                          Source

                                                                                          ++ show
                                                                                          |= vem=*
                                                                                          |^ ^- tank
                                                                                          ?: ?=(@ vem)
                                                                                          [%leaf (mesc (trip vem))]
                                                                                          ?- vem
                                                                                          [s=~ c=*]
                                                                                          [%leaf '\'' (weld (mesc (tape +.vem)) `tape`['\'' ~])]
                                                                                          ::
                                                                                          [s=%a c=@] [%leaf (mesc (trip c.vem))]
                                                                                          [s=%b c=*] (shop c.vem |=(a=@ ~(rub at a)))
                                                                                          [s=[%c p=@] c=*]
                                                                                          :+ %palm
                                                                                          [['.' ~] ['-' ~] ~ ~]
                                                                                          [[%leaf (mesc (trip p.s.vem))] $(vem c.vem) ~]
                                                                                          ::
                                                                                          [s=%d c=*] (shop c.vem |=(a=@ ~(rud at a)))
                                                                                          [s=%k c=*] (tank c.vem)
                                                                                          [s=%h c=*]
                                                                                          :+ %rose
                                                                                          [['/' ~] ['/' ~] ~]
                                                                                          =+ yol=((list @ta) c.vem)
                                                                                          (turn yol |=(a=@ta [%leaf (trip a)]))
                                                                                          ::
                                                                                          [s=%l c=*] (shol c.vem)
                                                                                          [s=%o c=*]
                                                                                          %= $
                                                                                          vem
                                                                                          :- [%m '%h::[%d %d].[%d %d]>']
                                                                                          [-.c.vem +<-.c.vem +<+.c.vem +>-.c.vem +>+.c.vem ~]
                                                                                          ==
                                                                                          ::
                                                                                          [s=%p c=*] (shop c.vem |=(a=@ ~(rup at a)))
                                                                                          [s=%q c=*] (shop c.vem |=(a=@ ~(r at a)))
                                                                                          [s=%r c=*] $(vem [[%r ' ' '{' '}'] c.vem])
                                                                                          [s=%t c=*] (shop c.vem |=(a=@ ~(rt at a)))
                                                                                          [s=%v c=*] (shop c.vem |=(a=@ ~(ruv at a)))
                                                                                          [s=%x c=*] (shop c.vem |=(a=@ ~(rux at a)))
                                                                                          [s=[%m p=@] c=*] (shep p.s.vem c.vem)
                                                                                          [s=[%r p=@] c=*]
                                                                                          $(vem [[%r ' ' (cut 3 [0 1] p.s.vem) (cut 3 [1 1] p.s.vem)] c.vem])
                                                                                          ::
                                                                                          [s=[%r p=@ q=@ r=@] c=*]
                                                                                          :+ %rose
                                                                                          :* p=(mesc (trip p.s.vem))
                                                                                          q=(mesc (trip q.s.vem))
                                                                                          r=(mesc (trip r.s.vem))
                                                                                          ==
                                                                                          |- ^- (list tank)
                                                                                          ?@ c.vem
                                                                                          ~
                                                                                          [^$(vem -.c.vem) $(c.vem +.c.vem)]
                                                                                          ::
                                                                                          [s=%z c=*] $(vem [[%r %$ %$ %$] c.vem])
                                                                                          * !!
                                                                                          ==
                                                                                          ++ shep
                                                                                          |= [fom=@ gar=*]
                                                                                          ^- tank
                                                                                          =+ l=(met 3 fom)
                                                                                          =+ i=0
                                                                                          :- %leaf
                                                                                          |- ^- tape
                                                                                          ?: (gte i l)
                                                                                          ~
                                                                                          =+ c=(cut 3 [i 1] fom)
                                                                                          ?. =(37 c)
                                                                                          (weld (mesc [c ~]) $(i +(i)))
                                                                                          =+ d=(cut 3 [+(i) 1] fom)
                                                                                          ?. .?(gar)
                                                                                          ['\\' '#' $(i (add 2 i))]
                                                                                          (weld ~(ram re (show d -.gar)) $(i (add 2 i), gar +.gar))
                                                                                          ::
                                                                                          ++ shop
                                                                                          |= [aug=* vel=$-(a=@ tape)]
                                                                                          ^- tank
                                                                                          ?: ?=(@ aug)
                                                                                          [%leaf (vel aug)]
                                                                                          :+ %rose
                                                                                          [[' ' ~] ['[' ~] [']' ~]]
                                                                                          => .(aug `*`aug)
                                                                                          |- ^- (list tank)
                                                                                          ?: ?=(@ aug)
                                                                                          [^$ ~]
                                                                                          [^$(aug -.aug) $(aug +.aug)]
                                                                                          ::
                                                                                          ++ shol
                                                                                          |= lim=*
                                                                                          :+ %rose
                                                                                          [['.' ~] ~ ~]
                                                                                          |- ^- (list tank)
                                                                                          ?: ?=(@ lim) ~
                                                                                          :_ $(lim +.lim)
                                                                                          ?+ -.lim (show '#')
                                                                                          ~ (show '$')
                                                                                          c=@ (show c.lim)
                                                                                          [%& %1] (show '.')
                                                                                          [%& c=@]
                                                                                          [%leaf '+' ~(rud at c.lim)]
                                                                                          ::
                                                                                          [%| @ ~] (show ',')
                                                                                          [%| n=@ ~ c=@]
                                                                                          [%leaf (weld (reap n.lim '^') ?~(c.lim "$" (trip c.lim)))]
                                                                                          ==
                                                                                          --

                                                                                          <-

                                                                                          4b: Text Processing

                                                                                          4d: Parsing (Tracing)

                                                                                          ->

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