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* 2740Kartik K. Agaram2016-03-081-0/+9
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<a href='https://github.com/akkartik/mu/blob/main/shell/main.mu'>https://github.com/akkartik/mu/blob/main/shell/main.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="muComment"># Experimental Mu shell</span>
<span id="L2" class="LineNr">  2 </span><span class="muComment"># A Lisp with indent-sensitivity and infix.</span>
<span id="L3" class="LineNr">  3 </span>
<span id="L4" class="LineNr">  4 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='main.mu.html#L4'>main</a></span> <a href='../500fake-screen.mu.html#L14'>screen</a>: (addr <a href='../500fake-screen.mu.html#L14'>screen</a>), keyboard: (addr keyboard), data-disk: (addr disk) <span class="Delimiter">{</span>
<span id="L5" class="LineNr">  5 </span>  <span class="PreProc">var</span> globals-storage: <a href='global.mu.html#L7'>global-table</a>
<span id="L6" class="LineNr">  6 </span>  <span class="PreProc">var</span> globals/<span class="Constant">edi</span>: (addr <a href='global.mu.html#L7'>global-table</a>) <span class="Special">&lt;-</span> address globals-storage
<span id="L7" class="LineNr">  7 </span>  <a href='global.mu.html#L12'>initialize-globals</a> globals
<span id="L8" class="LineNr">  8 </span>  <span class="PreProc">var</span> sandbox-storage: <a href='sandbox.mu.html#L1'>sandbox</a>
<span id="L9" class="LineNr">  9 </span>  <span class="PreProc">var</span> <a href='sandbox.mu.html#L1'>sandbox</a>/<span class="Constant">esi</span>: (addr <a href='sandbox.mu.html#L1'>sandbox</a>) <span class="Special">&lt;-</span> address sandbox-storage
<span id="L10" class="LineNr"> 10 </span>  <a href='sandbox.mu.html#L12'>initialize-sandbox</a> <a href='sandbox.mu.html#L1'>sandbox</a>, <span class="Constant">1</span>/with-screen
<span id="L11" class="LineNr"> 11 </span>  <a href='main.mu.html#L76'>load-state</a> data-disk, <a href='sandbox.mu.html#L1'>sandbox</a>, globals
<span id="L12" class="LineNr"> 12 </span>  $main:<span class="PreProc">loop</span>: <span class="Delimiter">{</span>
<span id="L13" class="LineNr"> 13 </span>    <span class="muComment"># globals layout: 1 char padding, 41 code, 1 padding, 41 code, 1 padding =  85</span>
<span id="L14" class="LineNr"> 14 </span>    <span class="muComment"># sandbox layout: 1 padding, 41 code, 1 padding                          =  43</span>
<span id="L15" class="LineNr"> 15 </span>    <span class="muComment">#                                                                  total = 128 chars</span>
<span id="L16" class="LineNr"> 16 </span>    <a href='global.mu.html#L127'>render-globals</a> <a href='../500fake-screen.mu.html#L14'>screen</a>, globals
<span id="L17" class="LineNr"> 17 </span>    <a href='sandbox.mu.html#L81'>render-sandbox</a> <a href='../500fake-screen.mu.html#L14'>screen</a>, <a href='sandbox.mu.html#L1'>sandbox</a>, <span class="Constant">0x55</span>/sandbox-left-margin, <span class="Constant">0</span>/sandbox-top-margin, <span class="Constant">0x80</span>/screen-width, <span class="Constant">0x2f</span>/screen-height-without-menu
<span id="L18" class="LineNr"> 18 </span>    <span class="Delimiter">{</span>
<span id="L19" class="LineNr"> 19 </span>      <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../102keyboard.subx.html#L21'>read-key</a> keyboard
<span id="L20" class="LineNr"> 20 </span>      compare key, <span class="Constant">0</span>
<span id="L21" class="LineNr"> 21 </span>      <span class="PreProc">loop-if-=</span>
<span id="L22" class="LineNr"> 22 </span>      <span class="muComment"># ctrl-r</span>
<span id="L23" class="LineNr"> 23 </span>      <span class="Delimiter">{</span>
<span id="L24" class="LineNr"> 24 </span>        compare key, <span class="Constant">0x12</span>/ctrl-r
<span id="L25" class="LineNr"> 25 </span>        <span class="PreProc">break-if-!=</span>
<span id="L26" class="LineNr"> 26 </span>        <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr handle <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
<span id="L27" class="LineNr"> 27 </span>        <span class="PreProc">var</span> <a href='cell.mu.html#L120'>nil</a>: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L28" class="LineNr"> 28 </span>        tmp <span class="Special">&lt;-</span> address <a href='cell.mu.html#L120'>nil</a>
<span id="L29" class="LineNr"> 29 </span>        <a href='cell.mu.html#L101'>allocate-pair</a> tmp
<span id="L30" class="LineNr"> 30 </span>        <span class="muComment"># (main 0/real-screen 0/real-keyboard)</span>
<span id="L31" class="LineNr"> 31 </span>        <span class="muComment"># We're using the fact that 'screen' and 'keyboard' in this function are always 0.</span>
<span id="L32" class="LineNr"> 32 </span>        <span class="PreProc">var</span> real-keyboard: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L33" class="LineNr"> 33 </span>        tmp <span class="Special">&lt;-</span> address real-keyboard
<span id="L34" class="LineNr"> 34 </span>        <a href='cell.mu.html#L176'>allocate-keyboard</a> tmp
<span id="L35" class="LineNr"> 35 </span>        <span class="muComment"># args = cons(real-keyboard, nil)</span>
<span id="L36" class="LineNr"> 36 </span>        <span class="PreProc">var</span> args: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L37" class="LineNr"> 37 </span>        tmp <span class="Special">&lt;-</span> address args
<span id="L38" class="LineNr"> 38 </span>        <a href='cell.mu.html#L115'>new-pair</a> tmp, real-keyboard, <a href='cell.mu.html#L120'>nil</a>
<span id="L39" class="LineNr"> 39 </span>        <span class="muComment">#</span>
<span id="L40" class="LineNr"> 40 </span>        <span class="PreProc">var</span> real-screen: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L41" class="LineNr"> 41 </span>        tmp <span class="Special">&lt;-</span> address real-screen
<span id="L42" class="LineNr"> 42 </span>        <a href='cell.mu.html#L145'>allocate-screen</a> tmp
<span id="L43" class="LineNr"> 43 </span>        <span class="muComment">#  args = cons(real-screen, args)</span>
<span id="L44" class="LineNr"> 44 </span>        tmp <span class="Special">&lt;-</span> address args
<span id="L45" class="LineNr"> 45 </span>        <a href='cell.mu.html#L115'>new-pair</a> tmp, real-screen, *tmp
<span id="L46" class="LineNr"> 46 </span>        <span class="muComment">#</span>
<span id="L47" class="LineNr"> 47 </span>        <span class="PreProc">var</span> <a href='main.mu.html#L4'>main</a>: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L48" class="LineNr"> 48 </span>        tmp <span class="Special">&lt;-</span> address <a href='main.mu.html#L4'>main</a>
<span id="L49" class="LineNr"> 49 </span>        <a href='cell.mu.html#L38'>new-symbol</a> tmp, <span class="Constant">&quot;main&quot;</span>
<span id="L50" class="LineNr"> 50 </span>        <span class="muComment"># args = cons(main, args)</span>
<span id="L51" class="LineNr"> 51 </span>        tmp <span class="Special">&lt;-</span> address args
<span id="L52" class="LineNr"> 52 </span>        <a href='cell.mu.html#L115'>new-pair</a> tmp, <a href='main.mu.html#L4'>main</a>, *tmp
<span id="L53" class="LineNr"> 53 </span>        <span class="muComment"># clear real screen</span>
<span id="L54" class="LineNr"> 54 </span>        <a href='../500fake-screen.mu.html#L230'>clear-screen</a> <a href='../500fake-screen.mu.html#L14'>screen</a>
<span id="L55" class="LineNr"> 55 </span>        <a href='../500fake-screen.mu.html#L169'>set-cursor-position</a> <a href='../500fake-screen.mu.html#L14'>screen</a>, <span class="Constant">0</span>, <span class="Constant">0</span>
<span id="L56" class="LineNr"> 56 </span>        <span class="muComment"># run</span>
<span id="L57" class="LineNr"> 57 </span>        <span class="PreProc">var</span> out: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L58" class="LineNr"> 58 </span>        <span class="PreProc">var</span> out-ah/<span class="Constant">ecx</span>: (addr handle <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> address out
<span id="L59" class="LineNr"> 59 </span>        <a href='evaluate.mu.html#L5'>evaluate</a> tmp, out-ah, <a href='cell.mu.html#L120'>nil</a>, globals, <span class="Constant">0</span>/trace, <span class="Constant">0</span>/no-fake-screen, <span class="Constant">0</span>/no-fake-keyboard, <span class="Constant">0</span>/call-number
<span id="L60" class="LineNr"> 60 </span>        <span class="Delimiter">{</span>
<span id="L61" class="LineNr"> 61 </span>          <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../102keyboard.subx.html#L21'>read-key</a> keyboard
<span id="L62" class="LineNr"> 62 </span>          compare tmp, <span class="Constant">0</span>
<span id="L63" class="LineNr"> 63 </span>          <span class="PreProc">loop-if-=</span>
<span id="L64" class="LineNr"> 64 </span>        <span class="Delimiter">}</span>
<span id="L65" class="LineNr"> 65 </span>        <span class="muComment">#</span>
<span id="L66" class="LineNr"> 66 </span>        <span class="PreProc">loop</span> $main:<span class="PreProc">loop</span>
<span id="L67" class="LineNr"> 67 </span>      <span class="Delimiter">}</span>
<span id="L68" class="LineNr"> 68 </span>      <span class="muComment"># no way to quit right now; just reboot</span>
<span id="L69" class="LineNr"> 69 </span>      <a href='sandbox.mu.html#L460'>edit-sandbox</a> <a href='sandbox.mu.html#L1'>sandbox</a>, key, globals, data-disk, <a href='../500fake-screen.mu.html#L14'>screen</a>, <span class="Constant">1</span>/tweak-real-screen
<span id="L70" class="LineNr"> 70 </span>    <span class="Delimiter">}</span>
<span id="L71" class="LineNr"> 71 </span>    <span class="PreProc">loop</span>
<span id="L72" class="LineNr"> 72 </span>  <span class="Delimiter">}</span>
<span id="L73" class="LineNr"> 73 </span><span class="Delimiter">}</span>
<span id="L74" class="LineNr"> 74 </span>
<span id="L75" class="LineNr"> 75 </span><span class="muComment"># Gotcha: some saved state may not load.</span>
<span id="L76" class="LineNr"> 76 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='main.mu.html#L76'>load-state</a></span> data-disk: (addr disk), _sandbox: (addr <a href='sandbox.mu.html#L1'>sandbox</a>), globals: (addr <a href='global.mu.html#L7'>global-table</a>) <span class="Delimiter">{</span>
<span id="L77" class="LineNr"> 77 </span>  <span class="PreProc">var</span> <a href='sandbox.mu.html#L1'>sandbox</a>/<span class="Constant">eax</span>: (addr <a href='sandbox.mu.html#L1'>sandbox</a>) <span class="Special">&lt;-</span> copy _sandbox
<span id="L78" class="LineNr"> 78 </span>  <span class="PreProc">var</span> data-ah/<span class="Constant">eax</span>: (addr handle <a href='gap-buffer.mu.html#L3'>gap-buffer</a>) <span class="Special">&lt;-</span> get <a href='sandbox.mu.html#L1'>sandbox</a>, data
<span id="L79" class="LineNr"> 79 </span>  <span class="PreProc">var</span> _data/<span class="Constant">eax</span>: (addr <a href='gap-buffer.mu.html#L3'>gap-buffer</a>) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L226'>lookup</a> *data-ah
<span id="L80" class="LineNr"> 80 </span>  <span class="PreProc">var</span> data/<span class="Constant">esi</span>: (addr <a href='gap-buffer.mu.html#L3'>gap-buffer</a>) <span class="Special">&lt;-</span> copy _data
<span id="L81" class="LineNr"> 81 </span>  <span class="muComment"># data-disk -&gt; stream</span>
<span id="L82" class="LineNr"> 82 </span>  <span class="PreProc">var</span> s-storage: (stream byte <span class="Constant">0x1000</span>)  <span class="muComment"># space for 8/sectors</span>
<span id="L83" class="LineNr"> 83 </span>  <span class="PreProc">var</span> s/<span class="Constant">ebx</span>: (addr stream byte) <span class="Special">&lt;-</span> address s-storage
<span id="L84" class="LineNr"> 84 </span>  <a href='../boot.subx.html#L925'>load-sectors</a> data-disk, <span class="Constant">0</span>/lba, <span class="Constant">8</span>/sectors, s
<span id="L85" class="LineNr"> 85 </span><span class="CommentedCode">#?   draw-stream-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, s, 7/fg, 0xc5/bg=blue-bg</span>
<span id="L86" class="LineNr"> 86 </span>  <span class="muComment"># stream -&gt; gap-buffer</span>
<span id="L87" class="LineNr"> 87 </span>  <a href='gap-buffer.mu.html#L52'>load-gap-buffer-from-stream</a> data, s
<span id="L88" class="LineNr"> 88 </span>  <a href='../106stream.subx.html#L20'>clear-stream</a> s
<span id="L89" class="LineNr"> 89 </span>  <span class="muComment"># read: gap-buffer -&gt; cell</span>
<span id="L90" class="LineNr"> 90 </span>  <span class="PreProc">var</span> initial-root-storage: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L91" class="LineNr"> 91 </span>  <span class="PreProc">var</span> initial-root/<span class="Constant">ecx</span>: (addr handle <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> address initial-root-storage
<span id="L92" class="LineNr"> 92 </span>  <a href='read.mu.html#L1'>read-cell</a> data, initial-root, <span class="Constant">0</span>/no-trace
<span id="L93" class="LineNr"> 93 </span>  <a href='gap-buffer.mu.html#L19'>clear-gap-buffer</a> data
<span id="L94" class="LineNr"> 94 </span>  <span class="muComment">#</span>
<span id="L95" class="LineNr"> 95 </span>  <span class="Delimiter">{</span>
<span id="L96" class="LineNr"> 96 </span>    <span class="PreProc">var</span> initial-root-addr/<span class="Constant">eax</span>: (addr <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L226'>lookup</a> *initial-root
<span id="L97" class="LineNr"> 97 </span>    compare initial-root-addr, <span class="Constant">0</span>
<span id="L98" class="LineNr"> 98 </span>    <span class="PreProc">break-if-!=</span>
<span id="L99" class="LineNr"> 99 </span>    <span class="PreProc">return</span>
<span id="L100" class="LineNr">100 </span>  <span class="Delimiter">}</span>
<span id="L101" class="LineNr">101 </span>  <span class="muComment"># load globals from assoc(initial-root, 'globals)</span>
<span id="L102" class="LineNr">102 </span>  <span class="PreProc">var</span> globals-literal-storage: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L103" class="LineNr">103 </span>  <span class="PreProc">var</span> globals-literal-ah/<span class="Constant">eax</span>: (addr handle <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> address globals-literal-storage
<span id="L104" class="LineNr">104 </span>  <a href='cell.mu.html#L38'>new-symbol</a> globals-literal-ah, <span class="Constant">&quot;globals&quot;</span>
<span id="L105" class="LineNr">105 </span>  <span class="PreProc">var</span> globals-literal/<span class="Constant">eax</span>: (addr <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L226'>lookup</a> *globals-literal-ah
<span id="L106" class="LineNr">106 </span>  <span class="PreProc">var</span> globals-cell-storage: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L107" class="LineNr">107 </span>  <span class="PreProc">var</span> globals-cell-ah/<span class="Constant">edx</span>: (addr handle <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> address globals-cell-storage
<span id="L108" class="LineNr">108 </span>  <a href='evaluate.mu.html#L632'>lookup-symbol</a> globals-literal, globals-cell-ah, *initial-root, <span class="Constant">0</span>/no-globals, <span class="Constant">0</span>/no-trace, <span class="Constant">0</span>/no-screen, <span class="Constant">0</span>/no-keyboard
<span id="L109" class="LineNr">109 </span>  <span class="PreProc">var</span> globals-cell/<span class="Constant">eax</span>: (addr <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L226'>lookup</a> *globals-cell-ah
<span id="L110" class="LineNr">110 </span>  <span class="Delimiter">{</span>
<span id="L111" class="LineNr">111 </span>    compare globals-cell, <span class="Constant">0</span>
<span id="L112" class="LineNr">112 </span>    <span class="PreProc">break-if-=</span>
<span id="L113" class="LineNr">113 </span>    <a href='global.mu.html#L59'>load-globals</a> globals-cell-ah, globals
<span id="L114" class="LineNr">114 </span>  <span class="Delimiter">}</span>
<span id="L115" class="LineNr">115 </span>  <span class="muComment"># sandbox = assoc(initial-root, 'sandbox)</span>
<span id="L116" class="LineNr">116 </span>  <span class="PreProc">var</span> sandbox-literal-storage: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L117" class="LineNr">117 </span>  <span class="PreProc">var</span> sandbox-literal-ah/<span class="Constant">eax</span>: (addr handle <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> address sandbox-literal-storage
<span id="L118" class="LineNr">118 </span>  <a href='cell.mu.html#L38'>new-symbol</a> sandbox-literal-ah, <span class="Constant">&quot;sandbox&quot;</span>
<span id="L119" class="LineNr">119 </span>  <span class="PreProc">var</span> sandbox-literal/<span class="Constant">eax</span>: (addr <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L226'>lookup</a> *sandbox-literal-ah
<span id="L120" class="LineNr">120 </span>  <span class="PreProc">var</span> sandbox-cell-storage: (handle <a href='cell.mu.html#L1'>cell</a>)
<span id="L121" class="LineNr">121 </span>  <span class="PreProc">var</span> sandbox-cell-ah/<span class="Constant">edx</span>: (addr handle <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> address sandbox-cell-storage
<span id="L122" class="LineNr">122 </span>  <a href='evaluate.mu.html#L632'>lookup-symbol</a> sandbox-literal, sandbox-cell-ah, *initial-root, <span class="Constant">0</span>/no-globals, <span class="Constant">0</span>/no-trace, <span class="Constant">0</span>/no-screen, <span class="Constant">0</span>/no-keyboard
<span id="L123" class="LineNr">123 </span>  <span class="PreProc">var</span> sandbox-cell/<span class="Constant">eax</span>: (addr <a href='cell.mu.html#L1'>cell</a>) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L226'>lookup</a> *sandbox-cell-ah
<span id="L124" class="LineNr">124 </span>  <span class="Delimiter">{</span>
<span id="L125" class="LineNr">125 </span>    compare sandbox-cell, <span class="Constant">0</span>
<span id="L126" class="LineNr">126 </span>    <span class="PreProc">break-if-=</span>
<span id="L127" class="LineNr">127 </span>    <span class="muComment"># print: cell -&gt; stream</span>
<span id="L128" class="LineNr">128 </span>    <a href='print.mu.html#L1'>print-cell</a> sandbox-cell-ah, s, <span class="Constant">0</span>/no-trace
<span id="L129" class="LineNr">129 </span>    <span class="muComment"># stream -&gt; gap-buffer</span>
<span id="L130" class="LineNr">130 </span>    <a href='gap-buffer.mu.html#L52'>load-gap-buffer-from-stream</a> data, s
<span id="L131" class="LineNr">131 </span>  <span class="Delimiter">}</span>
<span id="L132" class="LineNr">132 </span><span class="Delimiter">}</span>
<span id="L133" class="LineNr">133 </span>
<span id="L134" class="LineNr">134 </span><span class="muComment"># Save state as an alist of alists:</span>
<span id="L135" class="LineNr">135 </span><span class="muComment">#   ((globals . ((a . (fn ...))</span>
<span id="L136" class="LineNr">136 </span><span class="muComment">#                ...))</span>
<span id="L137" class="LineNr">137 </span><span class="muComment">#    (sandbox . ...))</span>
<span id="L138" class="LineNr">138 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='main.mu.html#L138'>store-state</a></span> data-disk: (addr disk), <a href='sandbox.mu.html#L1'>sandbox</a>: (addr <a href='sandbox.mu.html#L1'>sandbox</a>), globals: (addr <a href='global.mu.html#L7'>global-table</a>) <span class="Delimiter">{</span>
<span id="L139" class="LineNr">139 </span>  compare data-disk, <span class="Constant">0</span>/no-disk
<span id="L140" class="LineNr">140 </span>  <span class="Delimiter">{</span>
<span id="L141" class="LineNr">141 </span>    <span class="PreProc">break-if-!=</span>
<span id="L142" class="LineNr">142 </span>    <span class="PreProc">return</span>
<span id="L143" class="LineNr">143 </span>  <span class="Delimiter">}</span>
<span id="L144" class="LineNr">144 </span>  <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x1000</span>)  <span class="muComment"># space enough for 8/sectors</span>
<span id="L145" class="LineNr">145 </span>  <span class="PreProc">var</span> stream/<span class="Constant">edi</span>: (addr stream byte) <span class="Special">&lt;-</span> address stream-storage
<span id="L146" class="LineNr">146 </span>  <a href='../108write.subx.html#L11'>write</a> stream, <span class="Constant">&quot;(\n&quot;</span>
<span id="L147" class="LineNr">147 </span>  <a href='global.mu.html#L86'>write-globals</a> stream, globals
<span id="L148" class="LineNr">148 </span>  <a href='sandbox.mu.html#L64'>write-sandbox</a> stream, <a href='sandbox.mu.html#L1'>sandbox</a>
<span id="L149" class="LineNr">149 </span>  <a href='../108write.subx.html#L11'>write</a> stream, <span class="Constant">&quot;)\n&quot;</span>
<span id="L150" class="LineNr">150 </span>  <a href='../boot.subx.html#L987'>store-sectors</a> data-disk, <span class="Constant">0</span>/lba, <span class="Constant">8</span>/sectors, stream
<span id="L151" class="LineNr">151 </span><span class="Delimiter">}</span>
</pre>
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