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Diffstat (limited to 'html/064list.mu.html')
| -rw-r--r-- | html/064list.mu.html | 702 |
1 files changed, 351 insertions, 351 deletions
diff --git a/html/064list.mu.html b/html/064list.mu.html index 9711457f..4ac186a6 100644 --- a/html/064list.mu.html +++ b/html/064list.mu.html @@ -56,357 +56,357 @@ if ('onhashchange' in window) { </head> <body onload='JumpToLine();'> <pre id='vimCodeElement'> -<a name="L1"></a><span id="L1" class="LineNr"> 1 </span><span class="Comment"># A list links up multiple objects together to make them easier to manage.</span> -<a name="L2"></a><span id="L2" class="LineNr"> 2 </span><span class="Comment">#</span> -<a name="L3"></a><span id="L3" class="LineNr"> 3 </span><span class="Comment"># The objects must be of the same type. If you want to store multiple types in</span> -<a name="L4"></a><span id="L4" class="LineNr"> 4 </span><span class="Comment"># a single list, use an exclusive-container.</span> -<a name="L5"></a><span id="L5" class="LineNr"> 5 </span> -<a name="L6"></a><span id="L6" class="LineNr"> 6 </span><span class="muData">container</span> list:_elem [ -<a name="L7"></a><span id="L7" class="LineNr"> 7 </span> value:_elem -<a name="L8"></a><span id="L8" class="LineNr"> 8 </span> next:&:list:_elem -<a name="L9"></a><span id="L9" class="LineNr"> 9 </span>] -<a name="L10"></a><span id="L10" class="LineNr"> 10 </span> -<a name="L11"></a><span id="L11" class="LineNr"> 11 </span><span class="muRecipe">def</span> push x:_elem, l:&:list:_elem<span class="muRecipe"> -> </span>l:&:list:_elem [ -<a name="L12"></a><span id="L12" class="LineNr"> 12 </span> <span class="Constant">local-scope</span> -<a name="L13"></a><span id="L13" class="LineNr"> 13 </span> <span class="Constant">load-ingredients</span> -<a name="L14"></a><span id="L14" class="LineNr"> 14 </span> result:&:list:_elem <span class="Special"><-</span> new <span class="Delimiter">{</span>(list _elem): type<span class="Delimiter">}</span> -<a name="L15"></a><span id="L15" class="LineNr"> 15 </span> *result <span class="Special"><-</span> merge x, l -<a name="L16"></a><span id="L16" class="LineNr"> 16 </span> <span class="muControl">return</span> result -<a name="L17"></a><span id="L17" class="LineNr"> 17 </span>] -<a name="L18"></a><span id="L18" class="LineNr"> 18 </span> -<a name="L19"></a><span id="L19" class="LineNr"> 19 </span><span class="muRecipe">def</span> first in:&:list:_elem<span class="muRecipe"> -> </span>result:_elem [ -<a name="L20"></a><span id="L20" class="LineNr"> 20 </span> <span class="Constant">local-scope</span> -<a name="L21"></a><span id="L21" class="LineNr"> 21 </span> <span class="Constant">load-ingredients</span> -<a name="L22"></a><span id="L22" class="LineNr"> 22 </span> result <span class="Special"><-</span> get *in, <span class="Constant">value:offset</span> -<a name="L23"></a><span id="L23" class="LineNr"> 23 </span>] -<a name="L24"></a><span id="L24" class="LineNr"> 24 </span> -<a name="L25"></a><span id="L25" class="LineNr"> 25 </span><span class="muRecipe">def</span> rest in:&:list:_elem<span class="muRecipe"> -> </span>result:&:list:_elem/contained-in:in [ -<a name="L26"></a><span id="L26" class="LineNr"> 26 </span> <span class="Constant">local-scope</span> -<a name="L27"></a><span id="L27" class="LineNr"> 27 </span> <span class="Constant">load-ingredients</span> -<a name="L28"></a><span id="L28" class="LineNr"> 28 </span> result <span class="Special"><-</span> get *in, <span class="Constant">next:offset</span> -<a name="L29"></a><span id="L29" class="LineNr"> 29 </span>] -<a name="L30"></a><span id="L30" class="LineNr"> 30 </span> -<a name="L31"></a><span id="L31" class="LineNr"> 31 </span><span class="muScenario">scenario</span> list-handling [ -<a name="L32"></a><span id="L32" class="LineNr"> 32 </span> run [ -<a name="L33"></a><span id="L33" class="LineNr"> 33 </span> <span class="Constant">local-scope</span> -<a name="L34"></a><span id="L34" class="LineNr"> 34 </span> x:&:list:num <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L35"></a><span id="L35" class="LineNr"> 35 </span> x <span class="Special"><-</span> push<span class="Constant"> 4</span>, x -<a name="L36"></a><span id="L36" class="LineNr"> 36 </span> x <span class="Special"><-</span> push<span class="Constant"> 5</span>, x -<a name="L37"></a><span id="L37" class="LineNr"> 37 </span> 10:num/<span class="Special">raw</span> <span class="Special"><-</span> first x -<a name="L38"></a><span id="L38" class="LineNr"> 38 </span> x <span class="Special"><-</span> rest x -<a name="L39"></a><span id="L39" class="LineNr"> 39 </span> 11:num/<span class="Special">raw</span> <span class="Special"><-</span> first x -<a name="L40"></a><span id="L40" class="LineNr"> 40 </span> x <span class="Special"><-</span> rest x -<a name="L41"></a><span id="L41" class="LineNr"> 41 </span> 12:num/<span class="Special">raw</span> <span class="Special"><-</span> first x -<a name="L42"></a><span id="L42" class="LineNr"> 42 </span> 20:&:list:num/<span class="Special">raw</span> <span class="Special"><-</span> rest x -<a name="L43"></a><span id="L43" class="LineNr"> 43 </span> ] -<a name="L44"></a><span id="L44" class="LineNr"> 44 </span> memory-should-contain [ -<a name="L45"></a><span id="L45" class="LineNr"> 45 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> -<a name="L46"></a><span id="L46" class="LineNr"> 46 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 4</span> -<a name="L47"></a><span id="L47" class="LineNr"> 47 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<a name="L48"></a><span id="L48" class="LineNr"> 48 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># nothing left</span> -<a name="L49"></a><span id="L49" class="LineNr"> 49 </span> ] -<a name="L50"></a><span id="L50" class="LineNr"> 50 </span>] -<a name="L51"></a><span id="L51" class="LineNr"> 51 </span> -<a name="L52"></a><span id="L52" class="LineNr"> 52 </span><span class="muRecipe">def</span> length l:&:list:_elem<span class="muRecipe"> -> </span>result:num [ -<a name="L53"></a><span id="L53" class="LineNr"> 53 </span> <span class="Constant">local-scope</span> -<a name="L54"></a><span id="L54" class="LineNr"> 54 </span> <span class="Constant">load-ingredients</span> -<a name="L55"></a><span id="L55" class="LineNr"> 55 </span> <span class="muControl">return-unless</span> l,<span class="Constant"> 0</span> -<a name="L56"></a><span id="L56" class="LineNr"> 56 </span> rest:&:list:_elem <span class="Special"><-</span> rest l -<a name="L57"></a><span id="L57" class="LineNr"> 57 </span> length-of-rest:num <span class="Special"><-</span> length rest -<a name="L58"></a><span id="L58" class="LineNr"> 58 </span> result <span class="Special"><-</span> add length-of-rest,<span class="Constant"> 1</span> -<a name="L59"></a><span id="L59" class="LineNr"> 59 </span>] -<a name="L60"></a><span id="L60" class="LineNr"> 60 </span> -<a name="L61"></a><span id="L61" class="LineNr"> 61 </span><span class="Comment"># insert 'x' after 'in'</span> -<a name="L62"></a><span id="L62" class="LineNr"> 62 </span><span class="muRecipe">def</span> insert x:_elem, in:&:list:_elem<span class="muRecipe"> -> </span>in:&:list:_elem [ -<a name="L63"></a><span id="L63" class="LineNr"> 63 </span> <span class="Constant">local-scope</span> -<a name="L64"></a><span id="L64" class="LineNr"> 64 </span> <span class="Constant">load-ingredients</span> -<a name="L65"></a><span id="L65" class="LineNr"> 65 </span> new-node:&:list:_elem <span class="Special"><-</span> new <span class="Delimiter">{</span>(list _elem): type<span class="Delimiter">}</span> -<a name="L66"></a><span id="L66" class="LineNr"> 66 </span> *new-node <span class="Special"><-</span> put *new-node, <span class="Constant">value:offset</span>, x -<a name="L67"></a><span id="L67" class="LineNr"> 67 </span> next-node:&:list:_elem <span class="Special"><-</span> get *in, <span class="Constant">next:offset</span> -<a name="L68"></a><span id="L68" class="LineNr"> 68 </span> *in <span class="Special"><-</span> put *in, <span class="Constant">next:offset</span>, new-node -<a name="L69"></a><span id="L69" class="LineNr"> 69 </span> *new-node <span class="Special"><-</span> put *new-node, <span class="Constant">next:offset</span>, next-node -<a name="L70"></a><span id="L70" class="LineNr"> 70 </span>] -<a name="L71"></a><span id="L71" class="LineNr"> 71 </span> -<a name="L72"></a><span id="L72" class="LineNr"> 72 </span><span class="muScenario">scenario</span> inserting-into-list [ -<a name="L73"></a><span id="L73" class="LineNr"> 73 </span> <span class="Constant">local-scope</span> -<a name="L74"></a><span id="L74" class="LineNr"> 74 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L75"></a><span id="L75" class="LineNr"> 75 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list -<a name="L76"></a><span id="L76" class="LineNr"> 76 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list -<a name="L77"></a><span id="L77" class="LineNr"> 77 </span> run [ -<a name="L78"></a><span id="L78" class="LineNr"> 78 </span> list2:&:list:char <span class="Special"><-</span> rest list <span class="Comment"># inside list</span> -<a name="L79"></a><span id="L79" class="LineNr"> 79 </span> list2 <span class="Special"><-</span> insert<span class="Constant"> 6</span>, list2 -<a name="L80"></a><span id="L80" class="LineNr"> 80 </span> <span class="Comment"># check structure</span> -<a name="L81"></a><span id="L81" class="LineNr"> 81 </span> list2 <span class="Special"><-</span> copy list -<a name="L82"></a><span id="L82" class="LineNr"> 82 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L83"></a><span id="L83" class="LineNr"> 83 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L84"></a><span id="L84" class="LineNr"> 84 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L85"></a><span id="L85" class="LineNr"> 85 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L86"></a><span id="L86" class="LineNr"> 86 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L87"></a><span id="L87" class="LineNr"> 87 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L88"></a><span id="L88" class="LineNr"> 88 </span> 13:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L89"></a><span id="L89" class="LineNr"> 89 </span> ] -<a name="L90"></a><span id="L90" class="LineNr"> 90 </span> memory-should-contain [ -<a name="L91"></a><span id="L91" class="LineNr"> 91 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next</span> -<a name="L92"></a><span id="L92" class="LineNr"> 92 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 4</span> -<a name="L93"></a><span id="L93" class="LineNr"> 93 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 6</span> <span class="Comment"># inserted element</span> -<a name="L94"></a><span id="L94" class="LineNr"> 94 </span> <span class="Constant"> 13</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<a name="L95"></a><span id="L95" class="LineNr"> 95 </span> ] -<a name="L96"></a><span id="L96" class="LineNr"> 96 </span>] -<a name="L97"></a><span id="L97" class="LineNr"> 97 </span> -<a name="L98"></a><span id="L98" class="LineNr"> 98 </span><span class="muScenario">scenario</span> inserting-at-end-of-list [ -<a name="L99"></a><span id="L99" class="LineNr"> 99 </span> <span class="Constant">local-scope</span> -<a name="L100"></a><span id="L100" class="LineNr">100 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L101"></a><span id="L101" class="LineNr">101 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list -<a name="L102"></a><span id="L102" class="LineNr">102 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list -<a name="L103"></a><span id="L103" class="LineNr">103 </span> run [ -<a name="L104"></a><span id="L104" class="LineNr">104 </span> list2:&:list:char <span class="Special"><-</span> rest list <span class="Comment"># inside list</span> -<a name="L105"></a><span id="L105" class="LineNr">105 </span> list2 <span class="Special"><-</span> rest list2 <span class="Comment"># now at end of list</span> -<a name="L106"></a><span id="L106" class="LineNr">106 </span> list2 <span class="Special"><-</span> insert<span class="Constant"> 6</span>, list2 -<a name="L107"></a><span id="L107" class="LineNr">107 </span> <span class="Comment"># check structure like before</span> -<a name="L108"></a><span id="L108" class="LineNr">108 </span> list2 <span class="Special"><-</span> copy list -<a name="L109"></a><span id="L109" class="LineNr">109 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L110"></a><span id="L110" class="LineNr">110 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L111"></a><span id="L111" class="LineNr">111 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L112"></a><span id="L112" class="LineNr">112 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L113"></a><span id="L113" class="LineNr">113 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L114"></a><span id="L114" class="LineNr">114 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L115"></a><span id="L115" class="LineNr">115 </span> 13:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L116"></a><span id="L116" class="LineNr">116 </span> ] -<a name="L117"></a><span id="L117" class="LineNr">117 </span> memory-should-contain [ -<a name="L118"></a><span id="L118" class="LineNr">118 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next</span> -<a name="L119"></a><span id="L119" class="LineNr">119 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 4</span> -<a name="L120"></a><span id="L120" class="LineNr">120 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<a name="L121"></a><span id="L121" class="LineNr">121 </span> <span class="Constant"> 13</span> <span class="Special"><-</span><span class="Constant"> 6</span> <span class="Comment"># inserted element</span> -<a name="L122"></a><span id="L122" class="LineNr">122 </span> ] -<a name="L123"></a><span id="L123" class="LineNr">123 </span>] -<a name="L124"></a><span id="L124" class="LineNr">124 </span> -<a name="L125"></a><span id="L125" class="LineNr">125 </span><span class="muScenario">scenario</span> inserting-after-start-of-list [ -<a name="L126"></a><span id="L126" class="LineNr">126 </span> <span class="Constant">local-scope</span> -<a name="L127"></a><span id="L127" class="LineNr">127 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L128"></a><span id="L128" class="LineNr">128 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list -<a name="L129"></a><span id="L129" class="LineNr">129 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list -<a name="L130"></a><span id="L130" class="LineNr">130 </span> run [ -<a name="L131"></a><span id="L131" class="LineNr">131 </span> list <span class="Special"><-</span> insert<span class="Constant"> 6</span>, list -<a name="L132"></a><span id="L132" class="LineNr">132 </span> <span class="Comment"># check structure like before</span> -<a name="L133"></a><span id="L133" class="LineNr">133 </span> list2:&:list:char <span class="Special"><-</span> copy list -<a name="L134"></a><span id="L134" class="LineNr">134 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L135"></a><span id="L135" class="LineNr">135 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L136"></a><span id="L136" class="LineNr">136 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L137"></a><span id="L137" class="LineNr">137 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L138"></a><span id="L138" class="LineNr">138 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L139"></a><span id="L139" class="LineNr">139 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L140"></a><span id="L140" class="LineNr">140 </span> 13:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L141"></a><span id="L141" class="LineNr">141 </span> ] -<a name="L142"></a><span id="L142" class="LineNr">142 </span> memory-should-contain [ -<a name="L143"></a><span id="L143" class="LineNr">143 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next</span> -<a name="L144"></a><span id="L144" class="LineNr">144 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 6</span> <span class="Comment"># inserted element</span> -<a name="L145"></a><span id="L145" class="LineNr">145 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 4</span> -<a name="L146"></a><span id="L146" class="LineNr">146 </span> <span class="Constant"> 13</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<a name="L147"></a><span id="L147" class="LineNr">147 </span> ] -<a name="L148"></a><span id="L148" class="LineNr">148 </span>] -<a name="L149"></a><span id="L149" class="LineNr">149 </span> -<a name="L150"></a><span id="L150" class="LineNr">150 </span><span class="Comment"># remove 'x' from its surrounding list 'in'</span> -<a name="L151"></a><span id="L151" class="LineNr">151 </span><span class="Comment">#</span> -<a name="L152"></a><span id="L152" class="LineNr">152 </span><span class="Comment"># Returns null if and only if list is empty. Beware: in that case any other</span> -<a name="L153"></a><span id="L153" class="LineNr">153 </span><span class="Comment"># pointers to the head are now invalid.</span> -<a name="L154"></a><span id="L154" class="LineNr">154 </span><span class="muRecipe">def</span> remove x:&:list:_elem/contained-in:in, in:&:list:_elem<span class="muRecipe"> -> </span>in:&:list:_elem [ -<a name="L155"></a><span id="L155" class="LineNr">155 </span> <span class="Constant">local-scope</span> -<a name="L156"></a><span id="L156" class="LineNr">156 </span> <span class="Constant">load-ingredients</span> -<a name="L157"></a><span id="L157" class="LineNr">157 </span> <span class="Comment"># if 'x' is null, return</span> -<a name="L158"></a><span id="L158" class="LineNr">158 </span> <span class="muControl">return-unless</span> x -<a name="L159"></a><span id="L159" class="LineNr">159 </span> next-node:&:list:_elem <span class="Special"><-</span> rest x -<a name="L160"></a><span id="L160" class="LineNr">160 </span> <span class="Comment"># clear next pointer of 'x'</span> -<a name="L161"></a><span id="L161" class="LineNr">161 </span> *x <span class="Special"><-</span> put *x, <span class="Constant">next:offset</span>,<span class="Constant"> 0</span> -<a name="L162"></a><span id="L162" class="LineNr">162 </span> <span class="Comment"># if 'x' is at the head of 'in', return the new head</span> -<a name="L163"></a><span id="L163" class="LineNr">163 </span> at-head?:bool <span class="Special"><-</span> equal x, in -<a name="L164"></a><span id="L164" class="LineNr">164 </span> <span class="muControl">return-if</span> at-head?, next-node -<a name="L165"></a><span id="L165" class="LineNr">165 </span> <span class="Comment"># compute prev-node</span> -<a name="L166"></a><span id="L166" class="LineNr">166 </span> prev-node:&:list:_elem <span class="Special"><-</span> copy in -<a name="L167"></a><span id="L167" class="LineNr">167 </span> curr:&:list:_elem <span class="Special"><-</span> rest prev-node -<a name="L168"></a><span id="L168" class="LineNr">168 </span> <span class="Delimiter">{</span> -<a name="L169"></a><span id="L169" class="LineNr">169 </span> <span class="muControl">return-unless</span> curr -<a name="L170"></a><span id="L170" class="LineNr">170 </span> found?:bool <span class="Special"><-</span> equal curr, x -<a name="L171"></a><span id="L171" class="LineNr">171 </span> <span class="muControl">break-if</span> found? -<a name="L172"></a><span id="L172" class="LineNr">172 </span> prev-node <span class="Special"><-</span> copy curr -<a name="L173"></a><span id="L173" class="LineNr">173 </span> curr <span class="Special"><-</span> rest curr -<a name="L174"></a><span id="L174" class="LineNr">174 </span> <span class="Delimiter">}</span> -<a name="L175"></a><span id="L175" class="LineNr">175 </span> <span class="Comment"># set its next pointer to skip 'x'</span> -<a name="L176"></a><span id="L176" class="LineNr">176 </span> *prev-node <span class="Special"><-</span> put *prev-node, <span class="Constant">next:offset</span>, next-node -<a name="L177"></a><span id="L177" class="LineNr">177 </span>] -<a name="L178"></a><span id="L178" class="LineNr">178 </span> -<a name="L179"></a><span id="L179" class="LineNr">179 </span><span class="muScenario">scenario</span> removing-from-list [ -<a name="L180"></a><span id="L180" class="LineNr">180 </span> <span class="Constant">local-scope</span> -<a name="L181"></a><span id="L181" class="LineNr">181 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L182"></a><span id="L182" class="LineNr">182 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list -<a name="L183"></a><span id="L183" class="LineNr">183 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list -<a name="L184"></a><span id="L184" class="LineNr">184 </span> run [ -<a name="L185"></a><span id="L185" class="LineNr">185 </span> list2:&:list:char <span class="Special"><-</span> rest list <span class="Comment"># second element</span> -<a name="L186"></a><span id="L186" class="LineNr">186 </span> list <span class="Special"><-</span> remove list2, list -<a name="L187"></a><span id="L187" class="LineNr">187 </span> 10:bool/<span class="Special">raw</span> <span class="Special"><-</span> equal list2,<span class="Constant"> 0</span> -<a name="L188"></a><span id="L188" class="LineNr">188 </span> <span class="Comment"># check structure like before</span> -<a name="L189"></a><span id="L189" class="LineNr">189 </span> list2 <span class="Special"><-</span> copy list -<a name="L190"></a><span id="L190" class="LineNr">190 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L191"></a><span id="L191" class="LineNr">191 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L192"></a><span id="L192" class="LineNr">192 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L193"></a><span id="L193" class="LineNr">193 </span> 20:&:list:char/<span class="Special">raw</span> <span class="Special"><-</span> rest list2 -<a name="L194"></a><span id="L194" class="LineNr">194 </span> ] -<a name="L195"></a><span id="L195" class="LineNr">195 </span> memory-should-contain [ -<a name="L196"></a><span id="L196" class="LineNr">196 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># remove returned non-null</span> -<a name="L197"></a><span id="L197" class="LineNr">197 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next, skipping deleted element</span> -<a name="L198"></a><span id="L198" class="LineNr">198 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<a name="L199"></a><span id="L199" class="LineNr">199 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># no more elements</span> -<a name="L200"></a><span id="L200" class="LineNr">200 </span> ] -<a name="L201"></a><span id="L201" class="LineNr">201 </span>] -<a name="L202"></a><span id="L202" class="LineNr">202 </span> -<a name="L203"></a><span id="L203" class="LineNr">203 </span><span class="muScenario">scenario</span> removing-from-start-of-list [ -<a name="L204"></a><span id="L204" class="LineNr">204 </span> <span class="Constant">local-scope</span> -<a name="L205"></a><span id="L205" class="LineNr">205 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L206"></a><span id="L206" class="LineNr">206 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list -<a name="L207"></a><span id="L207" class="LineNr">207 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list -<a name="L208"></a><span id="L208" class="LineNr">208 </span> run [ -<a name="L209"></a><span id="L209" class="LineNr">209 </span> list <span class="Special"><-</span> remove list, list -<a name="L210"></a><span id="L210" class="LineNr">210 </span> <span class="Comment"># check structure like before</span> -<a name="L211"></a><span id="L211" class="LineNr">211 </span> list2:&:list:char <span class="Special"><-</span> copy list -<a name="L212"></a><span id="L212" class="LineNr">212 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L213"></a><span id="L213" class="LineNr">213 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L214"></a><span id="L214" class="LineNr">214 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L215"></a><span id="L215" class="LineNr">215 </span> 20:&:list:char/<span class="Special">raw</span> <span class="Special"><-</span> rest list2 -<a name="L216"></a><span id="L216" class="LineNr">216 </span> ] -<a name="L217"></a><span id="L217" class="LineNr">217 </span> memory-should-contain [ -<a name="L218"></a><span id="L218" class="LineNr">218 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 4</span> <span class="Comment"># scanning next, skipping deleted element</span> -<a name="L219"></a><span id="L219" class="LineNr">219 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<a name="L220"></a><span id="L220" class="LineNr">220 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># no more elements</span> -<a name="L221"></a><span id="L221" class="LineNr">221 </span> ] -<a name="L222"></a><span id="L222" class="LineNr">222 </span>] -<a name="L223"></a><span id="L223" class="LineNr">223 </span> -<a name="L224"></a><span id="L224" class="LineNr">224 </span><span class="muScenario">scenario</span> removing-from-end-of-list [ -<a name="L225"></a><span id="L225" class="LineNr">225 </span> <span class="Constant">local-scope</span> -<a name="L226"></a><span id="L226" class="LineNr">226 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L227"></a><span id="L227" class="LineNr">227 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list -<a name="L228"></a><span id="L228" class="LineNr">228 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list -<a name="L229"></a><span id="L229" class="LineNr">229 </span> run [ -<a name="L230"></a><span id="L230" class="LineNr">230 </span> <span class="Comment"># delete last element</span> -<a name="L231"></a><span id="L231" class="LineNr">231 </span> list2:&:list:char <span class="Special"><-</span> rest list -<a name="L232"></a><span id="L232" class="LineNr">232 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L233"></a><span id="L233" class="LineNr">233 </span> list <span class="Special"><-</span> remove list2, list -<a name="L234"></a><span id="L234" class="LineNr">234 </span> 10:bool/<span class="Special">raw</span> <span class="Special"><-</span> equal list2,<span class="Constant"> 0</span> -<a name="L235"></a><span id="L235" class="LineNr">235 </span> <span class="Comment"># check structure like before</span> -<a name="L236"></a><span id="L236" class="LineNr">236 </span> list2 <span class="Special"><-</span> copy list -<a name="L237"></a><span id="L237" class="LineNr">237 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L238"></a><span id="L238" class="LineNr">238 </span> list2 <span class="Special"><-</span> rest list2 -<a name="L239"></a><span id="L239" class="LineNr">239 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 -<a name="L240"></a><span id="L240" class="LineNr">240 </span> 20:&:list:char/<span class="Special">raw</span> <span class="Special"><-</span> rest list2 -<a name="L241"></a><span id="L241" class="LineNr">241 </span> ] -<a name="L242"></a><span id="L242" class="LineNr">242 </span> memory-should-contain [ -<a name="L243"></a><span id="L243" class="LineNr">243 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># remove returned non-null</span> -<a name="L244"></a><span id="L244" class="LineNr">244 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next, skipping deleted element</span> -<a name="L245"></a><span id="L245" class="LineNr">245 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 4</span> -<a name="L246"></a><span id="L246" class="LineNr">246 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># no more elements</span> -<a name="L247"></a><span id="L247" class="LineNr">247 </span> ] -<a name="L248"></a><span id="L248" class="LineNr">248 </span>] -<a name="L249"></a><span id="L249" class="LineNr">249 </span> -<a name="L250"></a><span id="L250" class="LineNr">250 </span><span class="muScenario">scenario</span> removing-from-singleton-list [ -<a name="L251"></a><span id="L251" class="LineNr">251 </span> <span class="Constant">local-scope</span> -<a name="L252"></a><span id="L252" class="LineNr">252 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<a name="L253"></a><span id="L253" class="LineNr">253 </span> run [ -<a name="L254"></a><span id="L254" class="LineNr">254 </span> list <span class="Special"><-</span> remove list, list -<a name="L255"></a><span id="L255" class="LineNr">255 </span> 1:num/<span class="Special">raw</span> <span class="Special"><-</span> copy list -<a name="L256"></a><span id="L256" class="LineNr">256 </span> ] -<a name="L257"></a><span id="L257" class="LineNr">257 </span> memory-should-contain [ -<a name="L258"></a><span id="L258" class="LineNr">258 </span> <span class="Constant"> 1</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># back to an empty list</span> -<a name="L259"></a><span id="L259" class="LineNr">259 </span> ] -<a name="L260"></a><span id="L260" class="LineNr">260 </span>] -<a name="L261"></a><span id="L261" class="LineNr">261 </span> -<a name="L262"></a><span id="L262" class="LineNr">262 </span><span class="Comment"># reverse the elements of a list</span> -<a name="L263"></a><span id="L263" class="LineNr">263 </span><span class="Comment"># (contributed by Caleb Couch)</span> -<a name="L264"></a><span id="L264" class="LineNr">264 </span><span class="muRecipe">def</span> reverse list:&:list:_elem temp:&:list:_elem/contained-in:result<span class="muRecipe"> -> </span>result:&:list:_elem [ -<a name="L265"></a><span id="L265" class="LineNr">265 </span> <span class="Constant">local-scope</span> -<a name="L266"></a><span id="L266" class="LineNr">266 </span> <span class="Constant">load-ingredients</span> -<a name="L267"></a><span id="L267" class="LineNr">267 </span> <span class="muControl">return-unless</span> list, temp -<a name="L268"></a><span id="L268" class="LineNr">268 </span> object:_elem <span class="Special"><-</span> first, list -<a name="L269"></a><span id="L269" class="LineNr">269 </span> list <span class="Special"><-</span> rest list -<a name="L270"></a><span id="L270" class="LineNr">270 </span> temp <span class="Special"><-</span> push object, temp -<a name="L271"></a><span id="L271" class="LineNr">271 </span> result <span class="Special"><-</span> reverse list, temp -<a name="L272"></a><span id="L272" class="LineNr">272 </span>] -<a name="L273"></a><span id="L273" class="LineNr">273 </span> -<a name="L274"></a><span id="L274" class="LineNr">274 </span><span class="muScenario">scenario</span> reverse-list [ -<a name="L275"></a><span id="L275" class="LineNr">275 </span> <span class="Constant">local-scope</span> -<a name="L276"></a><span id="L276" class="LineNr">276 </span> list:&:list:number <span class="Special"><-</span> push<span class="Constant"> 1</span>,<span class="Constant"> 0</span> -<a name="L277"></a><span id="L277" class="LineNr">277 </span> list <span class="Special"><-</span> push<span class="Constant"> 2</span>, list -<a name="L278"></a><span id="L278" class="LineNr">278 </span> list <span class="Special"><-</span> push<span class="Constant"> 3</span>, list -<a name="L279"></a><span id="L279" class="LineNr">279 </span> run [ -<a name="L280"></a><span id="L280" class="LineNr">280 </span> stash <span class="Constant">[list:]</span>, list -<a name="L281"></a><span id="L281" class="LineNr">281 </span> list <span class="Special"><-</span> reverse list -<a name="L282"></a><span id="L282" class="LineNr">282 </span> stash <span class="Constant">[reversed:]</span>, list -<a name="L283"></a><span id="L283" class="LineNr">283 </span> ] -<a name="L284"></a><span id="L284" class="LineNr">284 </span> trace-should-contain [ -<a name="L285"></a><span id="L285" class="LineNr">285 </span> app: list:<span class="Constant"> 3</span><span class="muRecipe"> -> </span>2<span class="muRecipe"> -> </span>1 -<a name="L286"></a><span id="L286" class="LineNr">286 </span> app: reversed:<span class="Constant"> 1</span><span class="muRecipe"> -> </span>2<span class="muRecipe"> -> </span>3 -<a name="L287"></a><span id="L287" class="LineNr">287 </span> ] -<a name="L288"></a><span id="L288" class="LineNr">288 </span>] -<a name="L289"></a><span id="L289" class="LineNr">289 </span> -<a name="L290"></a><span id="L290" class="LineNr">290 </span><span class="muRecipe">def</span> to-text in:&:list:_elem<span class="muRecipe"> -> </span>result:text [ -<a name="L291"></a><span id="L291" class="LineNr">291 </span> <span class="Constant">local-scope</span> -<a name="L292"></a><span id="L292" class="LineNr">292 </span> <span class="Constant">load-ingredients</span> -<a name="L293"></a><span id="L293" class="LineNr">293 </span> buf:&:buffer <span class="Special"><-</span> new-buffer<span class="Constant"> 80</span> -<a name="L294"></a><span id="L294" class="LineNr">294 </span> buf <span class="Special"><-</span> to-buffer in, buf -<a name="L295"></a><span id="L295" class="LineNr">295 </span> result <span class="Special"><-</span> buffer-to-array buf -<a name="L296"></a><span id="L296" class="LineNr">296 </span>] -<a name="L297"></a><span id="L297" class="LineNr">297 </span> -<a name="L298"></a><span id="L298" class="LineNr">298 </span><span class="Comment"># variant of 'to-text' which stops printing after a few elements (and so is robust to cycles)</span> -<a name="L299"></a><span id="L299" class="LineNr">299 </span><span class="muRecipe">def</span> to-text-line in:&:list:_elem<span class="muRecipe"> -> </span>result:text [ -<a name="L300"></a><span id="L300" class="LineNr">300 </span> <span class="Constant">local-scope</span> -<a name="L301"></a><span id="L301" class="LineNr">301 </span> <span class="Constant">load-ingredients</span> -<a name="L302"></a><span id="L302" class="LineNr">302 </span> buf:&:buffer <span class="Special"><-</span> new-buffer<span class="Constant"> 80</span> -<a name="L303"></a><span id="L303" class="LineNr">303 </span> buf <span class="Special"><-</span> to-buffer in, buf,<span class="Constant"> 6</span> <span class="Comment"># max elements to display</span> -<a name="L304"></a><span id="L304" class="LineNr">304 </span> result <span class="Special"><-</span> buffer-to-array buf -<a name="L305"></a><span id="L305" class="LineNr">305 </span>] -<a name="L306"></a><span id="L306" class="LineNr">306 </span> -<a name="L307"></a><span id="L307" class="LineNr">307 </span><span class="muRecipe">def</span> to-buffer in:&:list:_elem, buf:&:buffer<span class="muRecipe"> -> </span>buf:&:buffer [ -<a name="L308"></a><span id="L308" class="LineNr">308 </span> <span class="Constant">local-scope</span> -<a name="L309"></a><span id="L309" class="LineNr">309 </span> <span class="Constant">load-ingredients</span> -<a name="L310"></a><span id="L310" class="LineNr">310 </span> <span class="Delimiter">{</span> -<a name="L311"></a><span id="L311" class="LineNr">311 </span> <span class="muControl">break-if</span> in -<a name="L312"></a><span id="L312" class="LineNr">312 </span> buf <span class="Special"><-</span> append buf, <span class="Constant">[[]</span>] -<a name="L313"></a><span id="L313" class="LineNr">313 </span> <span class="muControl">return</span> -<a name="L314"></a><span id="L314" class="LineNr">314 </span> <span class="Delimiter">}</span> -<a name="L315"></a><span id="L315" class="LineNr">315 </span> <span class="Comment"># append in.value to buf</span> -<a name="L316"></a><span id="L316" class="LineNr">316 </span> val:_elem <span class="Special"><-</span> get *in, <span class="Constant">value:offset</span> -<a name="L317"></a><span id="L317" class="LineNr">317 </span> buf <span class="Special"><-</span> append buf, val -<a name="L318"></a><span id="L318" class="LineNr">318 </span> <span class="Comment"># now prepare next</span> -<a name="L319"></a><span id="L319" class="LineNr">319 </span> next:&:list:_elem <span class="Special"><-</span> rest in -<a name="L320"></a><span id="L320" class="LineNr">320 </span> nextn:num <span class="Special"><-</span> copy next -<a name="L321"></a><span id="L321" class="LineNr">321 </span> <span class="muControl">return-unless</span> next -<a name="L322"></a><span id="L322" class="LineNr">322 </span> buf <span class="Special"><-</span> append buf, <span class="Constant">[ -> ]</span> -<a name="L323"></a><span id="L323" class="LineNr">323 </span> <span class="Comment"># and recurse</span> -<a name="L324"></a><span id="L324" class="LineNr">324 </span> remaining:num, optional-ingredient-found?:bool <span class="Special"><-</span> <span class="Constant">next-ingredient</span> -<a name="L325"></a><span id="L325" class="LineNr">325 </span> <span class="Delimiter">{</span> -<a name="L326"></a><span id="L326" class="LineNr">326 </span> <span class="muControl">break-if</span> optional-ingredient-found? -<a name="L327"></a><span id="L327" class="LineNr">327 </span> <span class="Comment"># unlimited recursion</span> -<a name="L328"></a><span id="L328" class="LineNr">328 </span> buf <span class="Special"><-</span> to-buffer next, buf -<a name="L329"></a><span id="L329" class="LineNr">329 </span> <span class="muControl">return</span> -<a name="L330"></a><span id="L330" class="LineNr">330 </span> <span class="Delimiter">}</span> -<a name="L331"></a><span id="L331" class="LineNr">331 </span> <span class="Delimiter">{</span> -<a name="L332"></a><span id="L332" class="LineNr">332 </span> <span class="muControl">break-unless</span> remaining -<a name="L333"></a><span id="L333" class="LineNr">333 </span> <span class="Comment"># limited recursion</span> -<a name="L334"></a><span id="L334" class="LineNr">334 </span> remaining <span class="Special"><-</span> subtract remaining,<span class="Constant"> 1</span> -<a name="L335"></a><span id="L335" class="LineNr">335 </span> buf <span class="Special"><-</span> to-buffer next, buf, remaining -<a name="L336"></a><span id="L336" class="LineNr">336 </span> <span class="muControl">return</span> -<a name="L337"></a><span id="L337" class="LineNr">337 </span> <span class="Delimiter">}</span> -<a name="L338"></a><span id="L338" class="LineNr">338 </span> <span class="Comment"># past recursion depth; insert ellipses and stop</span> -<a name="L339"></a><span id="L339" class="LineNr">339 </span> append buf, <span class="Constant">[...]</span> -<a name="L340"></a><span id="L340" class="LineNr">340 </span>] -<a name="L341"></a><span id="L341" class="LineNr">341 </span> -<a name="L342"></a><span id="L342" class="LineNr">342 </span><span class="muScenario">scenario</span> stash-empty-list [ -<a name="L343"></a><span id="L343" class="LineNr">343 </span> <span class="Constant">local-scope</span> -<a name="L344"></a><span id="L344" class="LineNr">344 </span> x:&:list:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> -<a name="L345"></a><span id="L345" class="LineNr">345 </span> run [ -<a name="L346"></a><span id="L346" class="LineNr">346 </span> stash x -<a name="L347"></a><span id="L347" class="LineNr">347 </span> ] -<a name="L348"></a><span id="L348" class="LineNr">348 </span> trace-should-contain [ -<a name="L349"></a><span id="L349" class="LineNr">349 </span> app: <span class="Constant">[]</span> -<a name="L350"></a><span id="L350" class="LineNr">350 </span> ] -<a name="L351"></a><span id="L351" class="LineNr">351 </span>] +<span id="L1" class="LineNr"> 1 </span><span class="Comment"># A list links up multiple objects together to make them easier to manage.</span> +<span id="L2" class="LineNr"> 2 </span><span class="Comment">#</span> +<span id="L3" class="LineNr"> 3 </span><span class="Comment"># The objects must be of the same type. If you want to store multiple types in</span> +<span id="L4" class="LineNr"> 4 </span><span class="Comment"># a single list, use an exclusive-container.</span> +<span id="L5" class="LineNr"> 5 </span> +<span id="L6" class="LineNr"> 6 </span><span class="muData">container</span> list:_elem [ +<span id="L7" class="LineNr"> 7 </span> value:_elem +<span id="L8" class="LineNr"> 8 </span> next:&:list:_elem +<span id="L9" class="LineNr"> 9 </span>] +<span id="L10" class="LineNr"> 10 </span> +<span id="L11" class="LineNr"> 11 </span><span class="muRecipe">def</span> push x:_elem, l:&:list:_elem<span class="muRecipe"> -> </span>l:&:list:_elem [ +<span id="L12" class="LineNr"> 12 </span> <span class="Constant">local-scope</span> +<span id="L13" class="LineNr"> 13 </span> <span class="Constant">load-ingredients</span> +<span id="L14" class="LineNr"> 14 </span> result:&:list:_elem <span class="Special"><-</span> new <span class="Delimiter">{</span>(list _elem): type<span class="Delimiter">}</span> +<span id="L15" class="LineNr"> 15 </span> *result <span class="Special"><-</span> merge x, l +<span id="L16" class="LineNr"> 16 </span> <span class="muControl">return</span> result +<span id="L17" class="LineNr"> 17 </span>] +<span id="L18" class="LineNr"> 18 </span> +<span id="L19" class="LineNr"> 19 </span><span class="muRecipe">def</span> first in:&:list:_elem<span class="muRecipe"> -> </span>result:_elem [ +<span id="L20" class="LineNr"> 20 </span> <span class="Constant">local-scope</span> +<span id="L21" class="LineNr"> 21 </span> <span class="Constant">load-ingredients</span> +<span id="L22" class="LineNr"> 22 </span> result <span class="Special"><-</span> get *in, <span class="Constant">value:offset</span> +<span id="L23" class="LineNr"> 23 </span>] +<span id="L24" class="LineNr"> 24 </span> +<span id="L25" class="LineNr"> 25 </span><span class="muRecipe">def</span> rest in:&:list:_elem<span class="muRecipe"> -> </span>result:&:list:_elem/contained-in:in [ +<span id="L26" class="LineNr"> 26 </span> <span class="Constant">local-scope</span> +<span id="L27" class="LineNr"> 27 </span> <span class="Constant">load-ingredients</span> +<span id="L28" class="LineNr"> 28 </span> result <span class="Special"><-</span> get *in, <span class="Constant">next:offset</span> +<span id="L29" class="LineNr"> 29 </span>] +<span id="L30" class="LineNr"> 30 </span> +<span id="L31" class="LineNr"> 31 </span><span class="muScenario">scenario</span> list-handling [ +<span id="L32" class="LineNr"> 32 </span> run [ +<span id="L33" class="LineNr"> 33 </span> <span class="Constant">local-scope</span> +<span id="L34" class="LineNr"> 34 </span> x:&:list:num <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L35" class="LineNr"> 35 </span> x <span class="Special"><-</span> push<span class="Constant"> 4</span>, x +<span id="L36" class="LineNr"> 36 </span> x <span class="Special"><-</span> push<span class="Constant"> 5</span>, x +<span id="L37" class="LineNr"> 37 </span> 10:num/<span class="Special">raw</span> <span class="Special"><-</span> first x +<span id="L38" class="LineNr"> 38 </span> x <span class="Special"><-</span> rest x +<span id="L39" class="LineNr"> 39 </span> 11:num/<span class="Special">raw</span> <span class="Special"><-</span> first x +<span id="L40" class="LineNr"> 40 </span> x <span class="Special"><-</span> rest x +<span id="L41" class="LineNr"> 41 </span> 12:num/<span class="Special">raw</span> <span class="Special"><-</span> first x +<span id="L42" class="LineNr"> 42 </span> 20:&:list:num/<span class="Special">raw</span> <span class="Special"><-</span> rest x +<span id="L43" class="LineNr"> 43 </span> ] +<span id="L44" class="LineNr"> 44 </span> memory-should-contain [ +<span id="L45" class="LineNr"> 45 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> +<span id="L46" class="LineNr"> 46 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 4</span> +<span id="L47" class="LineNr"> 47 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L48" class="LineNr"> 48 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># nothing left</span> +<span id="L49" class="LineNr"> 49 </span> ] +<span id="L50" class="LineNr"> 50 </span>] +<span id="L51" class="LineNr"> 51 </span> +<span id="L52" class="LineNr"> 52 </span><span class="muRecipe">def</span> length l:&:list:_elem<span class="muRecipe"> -> </span>result:num [ +<span id="L53" class="LineNr"> 53 </span> <span class="Constant">local-scope</span> +<span id="L54" class="LineNr"> 54 </span> <span class="Constant">load-ingredients</span> +<span id="L55" class="LineNr"> 55 </span> <span class="muControl">return-unless</span> l,<span class="Constant"> 0</span> +<span id="L56" class="LineNr"> 56 </span> rest:&:list:_elem <span class="Special"><-</span> rest l +<span id="L57" class="LineNr"> 57 </span> length-of-rest:num <span class="Special"><-</span> length rest +<span id="L58" class="LineNr"> 58 </span> result <span class="Special"><-</span> add length-of-rest,<span class="Constant"> 1</span> +<span id="L59" class="LineNr"> 59 </span>] +<span id="L60" class="LineNr"> 60 </span> +<span id="L61" class="LineNr"> 61 </span><span class="Comment"># insert 'x' after 'in'</span> +<span id="L62" class="LineNr"> 62 </span><span class="muRecipe">def</span> insert x:_elem, in:&:list:_elem<span class="muRecipe"> -> </span>in:&:list:_elem [ +<span id="L63" class="LineNr"> 63 </span> <span class="Constant">local-scope</span> +<span id="L64" class="LineNr"> 64 </span> <span class="Constant">load-ingredients</span> +<span id="L65" class="LineNr"> 65 </span> new-node:&:list:_elem <span class="Special"><-</span> new <span class="Delimiter">{</span>(list _elem): type<span class="Delimiter">}</span> +<span id="L66" class="LineNr"> 66 </span> *new-node <span class="Special"><-</span> put *new-node, <span class="Constant">value:offset</span>, x +<span id="L67" class="LineNr"> 67 </span> next-node:&:list:_elem <span class="Special"><-</span> get *in, <span class="Constant">next:offset</span> +<span id="L68" class="LineNr"> 68 </span> *in <span class="Special"><-</span> put *in, <span class="Constant">next:offset</span>, new-node +<span id="L69" class="LineNr"> 69 </span> *new-node <span class="Special"><-</span> put *new-node, <span class="Constant">next:offset</span>, next-node +<span id="L70" class="LineNr"> 70 </span>] +<span id="L71" class="LineNr"> 71 </span> +<span id="L72" class="LineNr"> 72 </span><span class="muScenario">scenario</span> inserting-into-list [ +<span id="L73" class="LineNr"> 73 </span> <span class="Constant">local-scope</span> +<span id="L74" class="LineNr"> 74 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L75" class="LineNr"> 75 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list +<span id="L76" class="LineNr"> 76 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list +<span id="L77" class="LineNr"> 77 </span> run [ +<span id="L78" class="LineNr"> 78 </span> list2:&:list:char <span class="Special"><-</span> rest list <span class="Comment"># inside list</span> +<span id="L79" class="LineNr"> 79 </span> list2 <span class="Special"><-</span> insert<span class="Constant"> 6</span>, list2 +<span id="L80" class="LineNr"> 80 </span> <span class="Comment"># check structure</span> +<span id="L81" class="LineNr"> 81 </span> list2 <span class="Special"><-</span> copy list +<span id="L82" class="LineNr"> 82 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L83" class="LineNr"> 83 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L84" class="LineNr"> 84 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L85" class="LineNr"> 85 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L86" class="LineNr"> 86 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L87" class="LineNr"> 87 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L88" class="LineNr"> 88 </span> 13:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L89" class="LineNr"> 89 </span> ] +<span id="L90" class="LineNr"> 90 </span> memory-should-contain [ +<span id="L91" class="LineNr"> 91 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next</span> +<span id="L92" class="LineNr"> 92 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 4</span> +<span id="L93" class="LineNr"> 93 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 6</span> <span class="Comment"># inserted element</span> +<span id="L94" class="LineNr"> 94 </span> <span class="Constant"> 13</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L95" class="LineNr"> 95 </span> ] +<span id="L96" class="LineNr"> 96 </span>] +<span id="L97" class="LineNr"> 97 </span> +<span id="L98" class="LineNr"> 98 </span><span class="muScenario">scenario</span> inserting-at-end-of-list [ +<span id="L99" class="LineNr"> 99 </span> <span class="Constant">local-scope</span> +<span id="L100" class="LineNr">100 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L101" class="LineNr">101 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list +<span id="L102" class="LineNr">102 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list +<span id="L103" class="LineNr">103 </span> run [ +<span id="L104" class="LineNr">104 </span> list2:&:list:char <span class="Special"><-</span> rest list <span class="Comment"># inside list</span> +<span id="L105" class="LineNr">105 </span> list2 <span class="Special"><-</span> rest list2 <span class="Comment"># now at end of list</span> +<span id="L106" class="LineNr">106 </span> list2 <span class="Special"><-</span> insert<span class="Constant"> 6</span>, list2 +<span id="L107" class="LineNr">107 </span> <span class="Comment"># check structure like before</span> +<span id="L108" class="LineNr">108 </span> list2 <span class="Special"><-</span> copy list +<span id="L109" class="LineNr">109 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L110" class="LineNr">110 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L111" class="LineNr">111 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L112" class="LineNr">112 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L113" class="LineNr">113 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L114" class="LineNr">114 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L115" class="LineNr">115 </span> 13:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L116" class="LineNr">116 </span> ] +<span id="L117" class="LineNr">117 </span> memory-should-contain [ +<span id="L118" class="LineNr">118 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next</span> +<span id="L119" class="LineNr">119 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 4</span> +<span id="L120" class="LineNr">120 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L121" class="LineNr">121 </span> <span class="Constant"> 13</span> <span class="Special"><-</span><span class="Constant"> 6</span> <span class="Comment"># inserted element</span> +<span id="L122" class="LineNr">122 </span> ] +<span id="L123" class="LineNr">123 </span>] +<span id="L124" class="LineNr">124 </span> +<span id="L125" class="LineNr">125 </span><span class="muScenario">scenario</span> inserting-after-start-of-list [ +<span id="L126" class="LineNr">126 </span> <span class="Constant">local-scope</span> +<span id="L127" class="LineNr">127 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L128" class="LineNr">128 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list +<span id="L129" class="LineNr">129 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list +<span id="L130" class="LineNr">130 </span> run [ +<span id="L131" class="LineNr">131 </span> list <span class="Special"><-</span> insert<span class="Constant"> 6</span>, list +<span id="L132" class="LineNr">132 </span> <span class="Comment"># check structure like before</span> +<span id="L133" class="LineNr">133 </span> list2:&:list:char <span class="Special"><-</span> copy list +<span id="L134" class="LineNr">134 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L135" class="LineNr">135 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L136" class="LineNr">136 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L137" class="LineNr">137 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L138" class="LineNr">138 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L139" class="LineNr">139 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L140" class="LineNr">140 </span> 13:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L141" class="LineNr">141 </span> ] +<span id="L142" class="LineNr">142 </span> memory-should-contain [ +<span id="L143" class="LineNr">143 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next</span> +<span id="L144" class="LineNr">144 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 6</span> <span class="Comment"># inserted element</span> +<span id="L145" class="LineNr">145 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 4</span> +<span id="L146" class="LineNr">146 </span> <span class="Constant"> 13</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L147" class="LineNr">147 </span> ] +<span id="L148" class="LineNr">148 </span>] +<span id="L149" class="LineNr">149 </span> +<span id="L150" class="LineNr">150 </span><span class="Comment"># remove 'x' from its surrounding list 'in'</span> +<span id="L151" class="LineNr">151 </span><span class="Comment">#</span> +<span id="L152" class="LineNr">152 </span><span class="Comment"># Returns null if and only if list is empty. Beware: in that case any other</span> +<span id="L153" class="LineNr">153 </span><span class="Comment"># pointers to the head are now invalid.</span> +<span id="L154" class="LineNr">154 </span><span class="muRecipe">def</span> remove x:&:list:_elem/contained-in:in, in:&:list:_elem<span class="muRecipe"> -> </span>in:&:list:_elem [ +<span id="L155" class="LineNr">155 </span> <span class="Constant">local-scope</span> +<span id="L156" class="LineNr">156 </span> <span class="Constant">load-ingredients</span> +<span id="L157" class="LineNr">157 </span> <span class="Comment"># if 'x' is null, return</span> +<span id="L158" class="LineNr">158 </span> <span class="muControl">return-unless</span> x +<span id="L159" class="LineNr">159 </span> next-node:&:list:_elem <span class="Special"><-</span> rest x +<span id="L160" class="LineNr">160 </span> <span class="Comment"># clear next pointer of 'x'</span> +<span id="L161" class="LineNr">161 </span> *x <span class="Special"><-</span> put *x, <span class="Constant">next:offset</span>,<span class="Constant"> 0</span> +<span id="L162" class="LineNr">162 </span> <span class="Comment"># if 'x' is at the head of 'in', return the new head</span> +<span id="L163" class="LineNr">163 </span> at-head?:bool <span class="Special"><-</span> equal x, in +<span id="L164" class="LineNr">164 </span> <span class="muControl">return-if</span> at-head?, next-node +<span id="L165" class="LineNr">165 </span> <span class="Comment"># compute prev-node</span> +<span id="L166" class="LineNr">166 </span> prev-node:&:list:_elem <span class="Special"><-</span> copy in +<span id="L167" class="LineNr">167 </span> curr:&:list:_elem <span class="Special"><-</span> rest prev-node +<span id="L168" class="LineNr">168 </span> <span class="Delimiter">{</span> +<span id="L169" class="LineNr">169 </span> <span class="muControl">return-unless</span> curr +<span id="L170" class="LineNr">170 </span> found?:bool <span class="Special"><-</span> equal curr, x +<span id="L171" class="LineNr">171 </span> <span class="muControl">break-if</span> found? +<span id="L172" class="LineNr">172 </span> prev-node <span class="Special"><-</span> copy curr +<span id="L173" class="LineNr">173 </span> curr <span class="Special"><-</span> rest curr +<span id="L174" class="LineNr">174 </span> <span class="Delimiter">}</span> +<span id="L175" class="LineNr">175 </span> <span class="Comment"># set its next pointer to skip 'x'</span> +<span id="L176" class="LineNr">176 </span> *prev-node <span class="Special"><-</span> put *prev-node, <span class="Constant">next:offset</span>, next-node +<span id="L177" class="LineNr">177 </span>] +<span id="L178" class="LineNr">178 </span> +<span id="L179" class="LineNr">179 </span><span class="muScenario">scenario</span> removing-from-list [ +<span id="L180" class="LineNr">180 </span> <span class="Constant">local-scope</span> +<span id="L181" class="LineNr">181 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L182" class="LineNr">182 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list +<span id="L183" class="LineNr">183 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list +<span id="L184" class="LineNr">184 </span> run [ +<span id="L185" class="LineNr">185 </span> list2:&:list:char <span class="Special"><-</span> rest list <span class="Comment"># second element</span> +<span id="L186" class="LineNr">186 </span> list <span class="Special"><-</span> remove list2, list +<span id="L187" class="LineNr">187 </span> 10:bool/<span class="Special">raw</span> <span class="Special"><-</span> equal list2,<span class="Constant"> 0</span> +<span id="L188" class="LineNr">188 </span> <span class="Comment"># check structure like before</span> +<span id="L189" class="LineNr">189 </span> list2 <span class="Special"><-</span> copy list +<span id="L190" class="LineNr">190 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L191" class="LineNr">191 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L192" class="LineNr">192 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L193" class="LineNr">193 </span> 20:&:list:char/<span class="Special">raw</span> <span class="Special"><-</span> rest list2 +<span id="L194" class="LineNr">194 </span> ] +<span id="L195" class="LineNr">195 </span> memory-should-contain [ +<span id="L196" class="LineNr">196 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># remove returned non-null</span> +<span id="L197" class="LineNr">197 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next, skipping deleted element</span> +<span id="L198" class="LineNr">198 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L199" class="LineNr">199 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># no more elements</span> +<span id="L200" class="LineNr">200 </span> ] +<span id="L201" class="LineNr">201 </span>] +<span id="L202" class="LineNr">202 </span> +<span id="L203" class="LineNr">203 </span><span class="muScenario">scenario</span> removing-from-start-of-list [ +<span id="L204" class="LineNr">204 </span> <span class="Constant">local-scope</span> +<span id="L205" class="LineNr">205 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L206" class="LineNr">206 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list +<span id="L207" class="LineNr">207 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list +<span id="L208" class="LineNr">208 </span> run [ +<span id="L209" class="LineNr">209 </span> list <span class="Special"><-</span> remove list, list +<span id="L210" class="LineNr">210 </span> <span class="Comment"># check structure like before</span> +<span id="L211" class="LineNr">211 </span> list2:&:list:char <span class="Special"><-</span> copy list +<span id="L212" class="LineNr">212 </span> 10:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L213" class="LineNr">213 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L214" class="LineNr">214 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L215" class="LineNr">215 </span> 20:&:list:char/<span class="Special">raw</span> <span class="Special"><-</span> rest list2 +<span id="L216" class="LineNr">216 </span> ] +<span id="L217" class="LineNr">217 </span> memory-should-contain [ +<span id="L218" class="LineNr">218 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 4</span> <span class="Comment"># scanning next, skipping deleted element</span> +<span id="L219" class="LineNr">219 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L220" class="LineNr">220 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># no more elements</span> +<span id="L221" class="LineNr">221 </span> ] +<span id="L222" class="LineNr">222 </span>] +<span id="L223" class="LineNr">223 </span> +<span id="L224" class="LineNr">224 </span><span class="muScenario">scenario</span> removing-from-end-of-list [ +<span id="L225" class="LineNr">225 </span> <span class="Constant">local-scope</span> +<span id="L226" class="LineNr">226 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L227" class="LineNr">227 </span> list <span class="Special"><-</span> push<span class="Constant"> 4</span>, list +<span id="L228" class="LineNr">228 </span> list <span class="Special"><-</span> push<span class="Constant"> 5</span>, list +<span id="L229" class="LineNr">229 </span> run [ +<span id="L230" class="LineNr">230 </span> <span class="Comment"># delete last element</span> +<span id="L231" class="LineNr">231 </span> list2:&:list:char <span class="Special"><-</span> rest list +<span id="L232" class="LineNr">232 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L233" class="LineNr">233 </span> list <span class="Special"><-</span> remove list2, list +<span id="L234" class="LineNr">234 </span> 10:bool/<span class="Special">raw</span> <span class="Special"><-</span> equal list2,<span class="Constant"> 0</span> +<span id="L235" class="LineNr">235 </span> <span class="Comment"># check structure like before</span> +<span id="L236" class="LineNr">236 </span> list2 <span class="Special"><-</span> copy list +<span id="L237" class="LineNr">237 </span> 11:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L238" class="LineNr">238 </span> list2 <span class="Special"><-</span> rest list2 +<span id="L239" class="LineNr">239 </span> 12:char/<span class="Special">raw</span> <span class="Special"><-</span> first list2 +<span id="L240" class="LineNr">240 </span> 20:&:list:char/<span class="Special">raw</span> <span class="Special"><-</span> rest list2 +<span id="L241" class="LineNr">241 </span> ] +<span id="L242" class="LineNr">242 </span> memory-should-contain [ +<span id="L243" class="LineNr">243 </span> <span class="Constant"> 10</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># remove returned non-null</span> +<span id="L244" class="LineNr">244 </span> <span class="Constant"> 11</span> <span class="Special"><-</span><span class="Constant"> 5</span> <span class="Comment"># scanning next, skipping deleted element</span> +<span id="L245" class="LineNr">245 </span> <span class="Constant"> 12</span> <span class="Special"><-</span><span class="Constant"> 4</span> +<span id="L246" class="LineNr">246 </span> <span class="Constant"> 20</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># no more elements</span> +<span id="L247" class="LineNr">247 </span> ] +<span id="L248" class="LineNr">248 </span>] +<span id="L249" class="LineNr">249 </span> +<span id="L250" class="LineNr">250 </span><span class="muScenario">scenario</span> removing-from-singleton-list [ +<span id="L251" class="LineNr">251 </span> <span class="Constant">local-scope</span> +<span id="L252" class="LineNr">252 </span> list:&:list:char <span class="Special"><-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L253" class="LineNr">253 </span> run [ +<span id="L254" class="LineNr">254 </span> list <span class="Special"><-</span> remove list, list +<span id="L255" class="LineNr">255 </span> 1:num/<span class="Special">raw</span> <span class="Special"><-</span> copy list +<span id="L256" class="LineNr">256 </span> ] +<span id="L257" class="LineNr">257 </span> memory-should-contain [ +<span id="L258" class="LineNr">258 </span> <span class="Constant"> 1</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># back to an empty list</span> +<span id="L259" class="LineNr">259 </span> ] +<span id="L260" class="LineNr">260 </span>] +<span id="L261" class="LineNr">261 </span> +<span id="L262" class="LineNr">262 </span><span class="Comment"># reverse the elements of a list</span> +<span id="L263" class="LineNr">263 </span><span class="Comment"># (contributed by Caleb Couch)</span> +<span id="L264" class="LineNr">264 </span><span class="muRecipe">def</span> reverse list:&:list:_elem temp:&:list:_elem/contained-in:result<span class="muRecipe"> -> </span>result:&:list:_elem [ +<span id="L265" class="LineNr">265 </span> <span class="Constant">local-scope</span> +<span id="L266" class="LineNr">266 </span> <span class="Constant">load-ingredients</span> +<span id="L267" class="LineNr">267 </span> <span class="muControl">return-unless</span> list, temp +<span id="L268" class="LineNr">268 </span> object:_elem <span class="Special"><-</span> first, list +<span id="L269" class="LineNr">269 </span> list <span class="Special"><-</span> rest list +<span id="L270" class="LineNr">270 </span> temp <span class="Special"><-</span> push object, temp +<span id="L271" class="LineNr">271 </span> result <span class="Special"><-</span> reverse list, temp +<span id="L272" class="LineNr">272 </span>] +<span id="L273" class="LineNr">273 </span> +<span id="L274" class="LineNr">274 </span><span class="muScenario">scenario</span> reverse-list [ +<span id="L275" class="LineNr">275 </span> <span class="Constant">local-scope</span> +<span id="L276" class="LineNr">276 </span> list:&:list:number <span class="Special"><-</span> push<span class="Constant"> 1</span>,<span class="Constant"> 0</span> +<span id="L277" class="LineNr">277 </span> list <span class="Special"><-</span> push<span class="Constant"> 2</span>, list +<span id="L278" class="LineNr">278 </span> list <span class="Special"><-</span> push<span class="Constant"> 3</span>, list +<span id="L279" class="LineNr">279 </span> run [ +<span id="L280" class="LineNr">280 </span> stash <span class="Constant">[list:]</span>, list +<span id="L281" class="LineNr">281 </span> list <span class="Special"><-</span> reverse list +<span id="L282" class="LineNr">282 </span> stash <span class="Constant">[reversed:]</span>, list +<span id="L283" class="LineNr">283 </span> ] +<span id="L284" class="LineNr">284 </span> trace-should-contain [ +<span id="L285" class="LineNr">285 </span> app: list:<span class="Constant"> 3</span><span class="muRecipe"> -> </span>2<span class="muRecipe"> -> </span>1 +<span id="L286" class="LineNr">286 </span> app: reversed:<span class="Constant"> 1</span><span class="muRecipe"> -> </span>2<span class="muRecipe"> -> </span>3 +<span id="L287" class="LineNr">287 </span> ] +<span id="L288" class="LineNr">288 </span>] +<span id="L289" class="LineNr">289 </span> +<span id="L290" class="LineNr">290 </span><span class="muRecipe">def</span> to-text in:&:list:_elem<span class="muRecipe"> -> </span>result:text [ +<span id="L291" class="LineNr">291 </span> <span class="Constant">local-scope</span> +<span id="L292" class="LineNr">292 </span> <span class="Constant">load-ingredients</span> +<span id="L293" class="LineNr">293 </span> buf:&:buffer <span class="Special"><-</span> new-buffer<span class="Constant"> 80</span> +<span id="L294" class="LineNr">294 </span> buf <span class="Special"><-</span> to-buffer in, buf +<span id="L295" class="LineNr">295 </span> result <span class="Special"><-</span> buffer-to-array buf +<span id="L296" class="LineNr">296 </span>] +<span id="L297" class="LineNr">297 </span> +<span id="L298" class="LineNr">298 </span><span class="Comment"># variant of 'to-text' which stops printing after a few elements (and so is robust to cycles)</span> +<span id="L299" class="LineNr">299 </span><span class="muRecipe">def</span> to-text-line in:&:list:_elem<span class="muRecipe"> -> </span>result:text [ +<span id="L300" class="LineNr">300 </span> <span class="Constant">local-scope</span> +<span id="L301" class="LineNr">301 </span> <span class="Constant">load-ingredients</span> +<span id="L302" class="LineNr">302 </span> buf:&:buffer <span class="Special"><-</span> new-buffer<span class="Constant"> 80</span> +<span id="L303" class="LineNr">303 </span> buf <span class="Special"><-</span> to-buffer in, buf,<span class="Constant"> 6</span> <span class="Comment"># max elements to display</span> +<span id="L304" class="LineNr">304 </span> result <span class="Special"><-</span> buffer-to-array buf +<span id="L305" class="LineNr">305 </span>] +<span id="L306" class="LineNr">306 </span> +<span id="L307" class="LineNr">307 </span><span class="muRecipe">def</span> to-buffer in:&:list:_elem, buf:&:buffer<span class="muRecipe"> -> </span>buf:&:buffer [ +<span id="L308" class="LineNr">308 </span> <span class="Constant">local-scope</span> +<span id="L309" class="LineNr">309 </span> <span class="Constant">load-ingredients</span> +<span id="L310" class="LineNr">310 </span> <span class="Delimiter">{</span> +<span id="L311" class="LineNr">311 </span> <span class="muControl">break-if</span> in +<span id="L312" class="LineNr">312 </span> buf <span class="Special"><-</span> append buf, <span class="Constant">[[]</span>] +<span id="L313" class="LineNr">313 </span> <span class="muControl">return</span> +<span id="L314" class="LineNr">314 </span> <span class="Delimiter">}</span> +<span id="L315" class="LineNr">315 </span> <span class="Comment"># append in.value to buf</span> +<span id="L316" class="LineNr">316 </span> val:_elem <span class="Special"><-</span> get *in, <span class="Constant">value:offset</span> +<span id="L317" class="LineNr">317 </span> buf <span class="Special"><-</span> append buf, val +<span id="L318" class="LineNr">318 </span> <span class="Comment"># now prepare next</span> +<span id="L319" class="LineNr">319 </span> next:&:list:_elem <span class="Special"><-</span> rest in +<span id="L320" class="LineNr">320 </span> nextn:num <span class="Special"><-</span> copy next +<span id="L321" class="LineNr">321 </span> <span class="muControl">return-unless</span> next +<span id="L322" class="LineNr">322 </span> buf <span class="Special"><-</span> append buf, <span class="Constant">[ -> ]</span> +<span id="L323" class="LineNr">323 </span> <span class="Comment"># and recurse</span> +<span id="L324" class="LineNr">324 </span> remaining:num, optional-ingredient-found?:bool <span class="Special"><-</span> <span class="Constant">next-ingredient</span> +<span id="L325" class="LineNr">325 </span> <span class="Delimiter">{</span> +<span id="L326" class="LineNr">326 </span> <span class="muControl">break-if</span> optional-ingredient-found? +<span id="L327" class="LineNr">327 </span> <span class="Comment"># unlimited recursion</span> +<span id="L328" class="LineNr">328 </span> buf <span class="Special"><-</span> to-buffer next, buf +<span id="L329" class="LineNr">329 </span> <span class="muControl">return</span> +<span id="L330" class="LineNr">330 </span> <span class="Delimiter">}</span> +<span id="L331" class="LineNr">331 </span> <span class="Delimiter">{</span> +<span id="L332" class="LineNr">332 </span> <span class="muControl">break-unless</span> remaining +<span id="L333" class="LineNr">333 </span> <span class="Comment"># limited recursion</span> +<span id="L334" class="LineNr">334 </span> remaining <span class="Special"><-</span> subtract remaining,<span class="Constant"> 1</span> +<span id="L335" class="LineNr">335 </span> buf <span class="Special"><-</span> to-buffer next, buf, remaining +<span id="L336" class="LineNr">336 </span> <span class="muControl">return</span> +<span id="L337" class="LineNr">337 </span> <span class="Delimiter">}</span> +<span id="L338" class="LineNr">338 </span> <span class="Comment"># past recursion depth; insert ellipses and stop</span> +<span id="L339" class="LineNr">339 </span> append buf, <span class="Constant">[...]</span> +<span id="L340" class="LineNr">340 </span>] +<span id="L341" class="LineNr">341 </span> +<span id="L342" class="LineNr">342 </span><span class="muScenario">scenario</span> stash-empty-list [ +<span id="L343" class="LineNr">343 </span> <span class="Constant">local-scope</span> +<span id="L344" class="LineNr">344 </span> x:&:list:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<span id="L345" class="LineNr">345 </span> run [ +<span id="L346" class="LineNr">346 </span> stash x +<span id="L347" class="LineNr">347 </span> ] +<span id="L348" class="LineNr">348 </span> trace-should-contain [ +<span id="L349" class="LineNr">349 </span> app: <span class="Constant">[]</span> +<span id="L350" class="LineNr">350 </span> ] +<span id="L351" class="LineNr">351 </span>] </pre> </body> </html> |