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<a href='https://github.com/akkartik/mu/blob/master/082scenario_screen.cc'>https://github.com/akkartik/mu/blob/master/082scenario_screen.cc</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="Comment">//: Clean syntax to manipulate and check the screen in scenarios.</span>
<span id="L2" class="LineNr">  2 </span><span class="Comment">//: Instructions 'assume-screen' and 'screen-should-contain' implicitly create</span>
<span id="L3" class="LineNr">  3 </span><span class="Comment">//: a variable called 'screen' that is accessible to later instructions in the</span>
<span id="L4" class="LineNr">  4 </span><span class="Comment">//: scenario. 'screen-should-contain' can check unicode characters in the fake</span>
<span id="L5" class="LineNr">  5 </span><span class="Comment">//: screen</span>
<span id="L6" class="LineNr">  6 </span>
<span id="L7" class="LineNr">  7 </span><span class="Comment">//: first make sure we don't mangle these instructions in other transforms</span>
<span id="L8" class="LineNr">  8 </span><span class="Delimiter">:(before &quot;End initialize_transform_rewrite_literal_string_to_text()&quot;)</span>
<span id="L9" class="LineNr">  9 </span>recipes_taking_literal_strings<span class="Delimiter">.</span>insert<span class="Delimiter">(</span><span class="Constant">&quot;screen-should-contain&quot;</span><span class="Delimiter">);</span>
<span id="L10" class="LineNr"> 10 </span>recipes_taking_literal_strings<span class="Delimiter">.</span>insert<span class="Delimiter">(</span><span class="Constant">&quot;screen-should-contain-in-color&quot;</span><span class="Delimiter">);</span>
<span id="L11" class="LineNr"> 11 </span>
<span id="L12" class="LineNr"> 12 </span><span class="Delimiter">:(scenarios run_mu_scenario)</span>
<span id="L13" class="LineNr"> 13 </span><span class="Delimiter">:(scenario screen_in_scenario)</span>
<span id="L14" class="LineNr"> 14 </span><span class="muScenario"><a href='050scenario.cc.html#L57'>scenario</a></span> screen-in-scenario [
<span id="L15" class="LineNr"> 15 </span>  local-scope
<span id="L16" class="LineNr"> 16 </span>  assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
<span id="L17" class="LineNr"> 17 </span>  run [
<span id="L18" class="LineNr"> 18 </span>    <span class="Normal">a</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">97</span>/a
<span id="L19" class="LineNr"> 19 </span>    <span class="Normal">screen</span>:&amp;:screen<span class="Special"> &lt;- </span>print screen:&amp;:screen<span class="Delimiter">,</span> a
<span id="L20" class="LineNr"> 20 </span>  ]
<span id="L21" class="LineNr"> 21 </span>  screen-should-contain [
<span id="L22" class="LineNr"> 22 </span>  <span class="Comment">#  01234</span>
<span id="L23" class="LineNr"> 23 </span>    <span class="Delimiter">.</span>a    <span class="Delimiter">.</span>
<span id="L24" class="LineNr"> 24 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L25" class="LineNr"> 25 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L26" class="LineNr"> 26 </span>  ]
<span id="L27" class="LineNr"> 27 </span>]
<span id="L28" class="LineNr"> 28 </span><span class="Comment"># checks are inside scenario</span>
<span id="L29" class="LineNr"> 29 </span>
<span id="L30" class="LineNr"> 30 </span><span class="Delimiter">:(scenario screen_in_scenario_unicode)</span>
<span id="L31" class="LineNr"> 31 </span><span class="Comment"># screen-should-contain can check unicode characters in the fake screen</span>
<span id="L32" class="LineNr"> 32 </span><span class="muScenario"><a href='050scenario.cc.html#L57'>scenario</a></span> screen-in-scenario-unicode [
<span id="L33" class="LineNr"> 33 </span>  local-scope
<span id="L34" class="LineNr"> 34 </span>  assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
<span id="L35" class="LineNr"> 35 </span>  run [
<span id="L36" class="LineNr"> 36 </span>    <span class="Normal">lambda</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">955</span>/greek-small-lambda
<span id="L37" class="LineNr"> 37 </span>    <span class="Normal">screen</span>:&amp;:screen<span class="Special"> &lt;- </span>print screen:&amp;:screen<span class="Delimiter">,</span> lambda
<span id="L38" class="LineNr"> 38 </span>    <span class="Normal">a</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">97</span>/a
<span id="L39" class="LineNr"> 39 </span>    <span class="Normal">screen</span>:&amp;:screen<span class="Special"> &lt;- </span>print screen:&amp;:screen<span class="Delimiter">,</span> a
<span id="L40" class="LineNr"> 40 </span>  ]
<span id="L41" class="LineNr"> 41 </span>  screen-should-contain [
<span id="L42" class="LineNr"> 42 </span>  <span class="Comment">#  01234</span>
<span id="L43" class="LineNr"> 43 </span>    <span class="Delimiter">.</span>λa   <span class="Delimiter">.</span>
<span id="L44" class="LineNr"> 44 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L45" class="LineNr"> 45 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L46" class="LineNr"> 46 </span>  ]
<span id="L47" class="LineNr"> 47 </span>]
<span id="L48" class="LineNr"> 48 </span><span class="Comment"># checks are inside scenario</span>
<span id="L49" class="LineNr"> 49 </span>
<span id="L50" class="LineNr"> 50 </span><span class="Delimiter">:(scenario screen_in_scenario_color)</span>
<span id="L51" class="LineNr"> 51 </span><span class="muScenario"><a href='050scenario.cc.html#L57'>scenario</a></span> screen-in-scenario-color [
<span id="L52" class="LineNr"> 52 </span>  local-scope
<span id="L53" class="LineNr"> 53 </span>  assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
<span id="L54" class="LineNr"> 54 </span>  run [
<span id="L55" class="LineNr"> 55 </span>    <span class="Normal">lambda</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">955</span>/greek-small-lambda
<span id="L56" class="LineNr"> 56 </span>    <span class="Normal">screen</span>:&amp;:screen<span class="Special"> &lt;- </span>print screen:&amp;:screen<span class="Delimiter">,</span> lambda<span class="Delimiter">,</span> <span class="Constant">1</span>/red
<span id="L57" class="LineNr"> 57 </span>    <span class="Normal">a</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">97</span>/a
<span id="L58" class="LineNr"> 58 </span>    <span class="Normal">screen</span>:&amp;:screen<span class="Special"> &lt;- </span>print screen:&amp;:screen<span class="Delimiter">,</span> a<span class="Delimiter">,</span> <span class="Constant">7</span>/white
<span id="L59" class="LineNr"> 59 </span>  ]
<span id="L60" class="LineNr"> 60 </span>  <span class="Comment"># screen-should-contain shows everything</span>
<span id="L61" class="LineNr"> 61 </span>  screen-should-contain [
<span id="L62" class="LineNr"> 62 </span>  <span class="Comment">#  01234</span>
<span id="L63" class="LineNr"> 63 </span>    <span class="Delimiter">.</span>λa   <span class="Delimiter">.</span>
<span id="L64" class="LineNr"> 64 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L65" class="LineNr"> 65 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L66" class="LineNr"> 66 </span>  ]
<span id="L67" class="LineNr"> 67 </span>  <span class="Comment"># screen-should-contain-in-color filters out everything except the given</span>
<span id="L68" class="LineNr"> 68 </span>  <span class="Comment"># color, all you see is the 'a' in white.</span>
<span id="L69" class="LineNr"> 69 </span>  screen-should-contain-in-color <span class="Constant">7</span>/white<span class="Delimiter">,</span> [
<span id="L70" class="LineNr"> 70 </span>  <span class="Comment">#  01234</span>
<span id="L71" class="LineNr"> 71 </span>    <span class="Delimiter">.</span> a   <span class="Delimiter">.</span>
<span id="L72" class="LineNr"> 72 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L73" class="LineNr"> 73 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L74" class="LineNr"> 74 </span>  ]
<span id="L75" class="LineNr"> 75 </span>  <span class="Comment"># ..and the λ in red.</span>
<span id="L76" class="LineNr"> 76 </span>  screen-should-contain-in-color <span class="Constant">1</span>/red<span class="Delimiter">,</span> [
<span id="L77" class="LineNr"> 77 </span>  <span class="Comment">#  01234</span>
<span id="L78" class="LineNr"> 78 </span>    <span class="Delimiter">.</span>λ    <span class="Delimiter">.</span>
<span id="L79" class="LineNr"> 79 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L80" class="LineNr"> 80 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L81" class="LineNr"> 81 </span>  ]
<span id="L82" class="LineNr"> 82 </span>]
<span id="L83" class="LineNr"> 83 </span><span class="Comment"># checks are inside scenario</span>
<span id="L84" class="LineNr"> 84 </span>
<span id="L85" class="LineNr"> 85 </span><span class="Delimiter">:(scenario screen_in_scenario_error)</span>
<span id="L86" class="LineNr"> 86 </span><span class="Special">% Scenario_testing_scenario = true;</span>
<span id="L87" class="LineNr"> 87 </span><span class="Special">% Hide_errors = true;</span>
<span id="L88" class="LineNr"> 88 </span><span class="muScenario"><a href='050scenario.cc.html#L57'>scenario</a></span> screen-in-scenario-error [
<span id="L89" class="LineNr"> 89 </span>  local-scope
<span id="L90" class="LineNr"> 90 </span>  assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
<span id="L91" class="LineNr"> 91 </span>  run [
<span id="L92" class="LineNr"> 92 </span>    <span class="Normal">a</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">97</span>/a
<span id="L93" class="LineNr"> 93 </span>    <span class="Normal">screen</span>:&amp;:screen<span class="Special"> &lt;- </span>print screen:&amp;:screen<span class="Delimiter">,</span> a
<span id="L94" class="LineNr"> 94 </span>  ]
<span id="L95" class="LineNr"> 95 </span>  screen-should-contain [
<span id="L96" class="LineNr"> 96 </span>  <span class="Comment">#  01234</span>
<span id="L97" class="LineNr"> 97 </span>    <span class="Delimiter">.</span>b    <span class="Delimiter">.</span>
<span id="L98" class="LineNr"> 98 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L99" class="LineNr"> 99 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L100" class="LineNr">100 </span>  ]
<span id="L101" class="LineNr">101 </span>]
<span id="L102" class="LineNr">102 </span><span class="traceContains">+error: F - screen-in-scenario-error: expected screen location (0, 0) to contain 98 ('b') instead of 97 ('a')</span>
<span id="L103" class="LineNr">103 </span>
<span id="L104" class="LineNr">104 </span><span class="Delimiter">:(scenario screen_in_scenario_color_error)</span>
<span id="L105" class="LineNr">105 </span><span class="Special">% Scenario_testing_scenario = true;</span>
<span id="L106" class="LineNr">106 </span><span class="Special">% Hide_errors = true;</span>
<span id="L107" class="LineNr">107 </span><span class="Comment"># screen-should-contain can check unicode characters in the fake screen</span>
<span id="L108" class="LineNr">108 </span><span class="muScenario"><a href='050scenario.cc.html#L57'>scenario</a></span> screen-in-scenario-color-error [
<span id="L109" class="LineNr">109 </span>  local-scope
<span id="L110" class="LineNr">110 </span>  assume-screen <span class="Constant">5</span>/width<span class="Delimiter">,</span> <span class="Constant">3</span>/height
<span id="L111" class="LineNr">111 </span>  run [
<span id="L112" class="LineNr">112 </span>    <span class="Normal">a</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">97</span>/a
<span id="L113" class="LineNr">113 </span>    <span class="Normal">screen</span>:&amp;:screen<span class="Special"> &lt;- </span>print screen:&amp;:screen<span class="Delimiter">,</span> a<span class="Delimiter">,</span> <span class="Constant">1</span>/red
<span id="L114" class="LineNr">114 </span>  ]
<span id="L115" class="LineNr">115 </span>  screen-should-contain-in-color <span class="Constant">2</span>/green<span class="Delimiter">,</span> [
<span id="L116" class="LineNr">116 </span>  <span class="Comment">#  01234</span>
<span id="L117" class="LineNr">117 </span>    <span class="Delimiter">.</span>a    <span class="Delimiter">.</span>
<span id="L118" class="LineNr">118 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L119" class="LineNr">119 </span>    <span class="Delimiter">.</span>     <span class="Delimiter">.</span>
<span id="L120" class="LineNr">120 </span>  ]
<span id="L121" class="LineNr">121 </span>]
<span id="L122" class="LineNr">122 </span><span class="traceContains">+error: F - screen-in-scenario-color-error: expected screen location (0, 0) to contain 'a' in color 2 instead of 1</span>
<span id="L123" class="LineNr">123 </span>
<span id="L124" class="LineNr">124 </span><span class="Delimiter">:(scenarios run)</span>
<span id="L125" class="LineNr">125 </span><span class="Delimiter">:(scenario convert_names_does_not_fail_when_mixing_special_names_and_numeric_locations)</span>
<span id="L126" class="LineNr">126 </span><span class="Special">% Scenario_testing_scenario = true;</span>
<span id="L127" class="LineNr">127 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L128" class="LineNr">128 </span>  <span class="Normal">screen</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:num
<span id="L129" class="LineNr">129 </span>]
<span id="L130" class="LineNr">130 </span><span class="traceAbsent">-error: mixing variable names and numeric addresses in <a href='000organization.cc.html#L113'>main</a></span>
<span id="L131" class="LineNr">131 </span>$error: <span class="Constant">0</span>
<span id="L132" class="LineNr">132 </span><span class="Delimiter">:(scenarios run_mu_scenario)</span>
<span id="L133" class="LineNr">133 </span>
<span id="L134" class="LineNr">134 </span><span class="Comment">//: It's easier to implement assume-screen and other similar scenario-only</span>
<span id="L135" class="LineNr">135 </span><span class="Comment">//: primitives if they always write to a fixed location. So we'll assign a</span>
<span id="L136" class="LineNr">136 </span><span class="Comment">//: single fixed location for the per-scenario screen, keyboard, file system,</span>
<span id="L137" class="LineNr">137 </span><span class="Comment">//: etc. Carve space for these fixed locations out of the reserved-for-test</span>
<span id="L138" class="LineNr">138 </span><span class="Comment">//: locations.</span>
<span id="L139" class="LineNr">139 </span>
<span id="L140" class="LineNr">140 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L141" class="LineNr">141 </span><span class="Normal">extern</span> <span class="Normal">const</span> <span class="Normal">int</span> <span class="Special">Max_variables_in_scenarios</span> = <span class="Special">Reserved_for_tests-100</span><span class="Delimiter">;</span>
<span id="L142" class="LineNr">142 </span><span class="Normal">int</span> <span class="Special">Next_predefined_global_for_scenarios</span> = <span class="Special">Max_variables_in_scenarios</span><span class="Delimiter">;</span>
<span id="L143" class="LineNr">143 </span><span class="Delimiter">:(before &quot;End Reset&quot;)</span>
<span id="L144" class="LineNr">144 </span>assert<span class="Delimiter">(</span><span class="Special">Next_predefined_global_for_scenarios</span> &lt; <span class="Special">Reserved_for_tests</span><span class="Delimiter">);</span>
<span id="L145" class="LineNr">145 </span>
<span id="L146" class="LineNr">146 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L147" class="LineNr">147 </span><span class="Comment">// Scenario Globals.</span>
<span id="L148" class="LineNr">148 </span><span class="Normal">extern</span> <span class="Normal">const</span> <span class="Normal">int</span> SCREEN = next_predefined_global_for_scenarios<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">size_of(address:screen)</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">);</span>
<span id="L149" class="LineNr">149 </span><span class="Comment">// End Scenario Globals.</span>
<span id="L150" class="LineNr">150 </span><span class="Delimiter">:(code)</span>
<span id="L151" class="LineNr">151 </span><span class="Normal">int</span> next_predefined_global_for_scenarios<span class="Delimiter">(</span><span class="Normal">int</span> size<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L152" class="LineNr">152 </span>  <span class="Normal">int</span> result = <span class="Special">Next_predefined_global_for_scenarios</span><span class="Delimiter">;</span>
<span id="L153" class="LineNr">153 </span>  <span class="Special">Next_predefined_global_for_scenarios</span> += size<span class="Delimiter">;</span>
<span id="L154" class="LineNr">154 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L155" class="LineNr">155 </span><span class="Delimiter">}</span>
<span id="L156" class="LineNr">156 </span>
<span id="L157" class="LineNr">157 </span><span class="Comment">//: give 'screen' a fixed location in scenarios</span>
<span id="L158" class="LineNr">158 </span><span class="Delimiter">:(before &quot;End Special Scenario Variable Names(r)&quot;)</span>
<span id="L159" class="LineNr">159 </span><span class="Special">Name</span>[r][<span class="Constant">&quot;screen&quot;</span>] = SCREEN<span class="Delimiter">;</span>
<span id="L160" class="LineNr">160 </span><span class="Comment">//: make 'screen' always a raw location in scenarios</span>
<span id="L161" class="LineNr">161 </span><span class="Delimiter">:(before &quot;End <a href='042name.cc.html#L172'>is_special_name</a> Special-cases&quot;)</span>
<span id="L162" class="LineNr">162 </span><span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">&quot;screen&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L163" class="LineNr">163 </span>
<span id="L164" class="LineNr">164 </span><span class="Delimiter">:(before &quot;End Rewrite Instruction(curr, <a href='010vm.cc.html#L19'>recipe</a> result)&quot;)</span>
<span id="L165" class="LineNr">165 </span><span class="Comment">// rewrite 'assume-screen width, height' to</span>
<span id="L166" class="LineNr">166 </span><span class="Comment">// 'screen:&amp;:screen &lt;- new-fake-screen width, height'</span>
<span id="L167" class="LineNr">167 </span><span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>name == <span class="Constant">&quot;assume-screen&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L168" class="LineNr">168 </span>  curr<span class="Delimiter">.</span>name = <span class="Constant">&quot;new-fake-screen&quot;</span><span class="Delimiter">;</span>
<span id="L169" class="LineNr">169 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L170" class="LineNr">170 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; result<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;: 'assume-screen' has no products\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L171" class="LineNr">171 </span>  <span class="Delimiter">}</span>
<span id="L172" class="LineNr">172 </span>  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!starts_with<span class="Delimiter">(</span>result<span class="Delimiter">.</span>name<span class="Delimiter">,</span> <span class="Constant">&quot;scenario_&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L173" class="LineNr">173 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; result<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;: 'assume-screen' can't be called here, only in scenarios\n&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L174" class="LineNr">174 </span>  <span class="Delimiter">}</span>
<span id="L175" class="LineNr">175 </span>  <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L176" class="LineNr">176 </span>    assert<span class="Delimiter">(</span>curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
<span id="L177" class="LineNr">177 </span>    curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;screen:&amp;:screen/raw&quot;</span><span class="Delimiter">));</span>
<span id="L178" class="LineNr">178 </span>    curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span><a href='010vm.cc.html#L67'>set_value</a><span class="Delimiter">(</span>SCREEN<span class="Delimiter">);</span>
<span id="L179" class="LineNr">179 </span>  <span class="Delimiter">}</span>
<span id="L180" class="LineNr">180 </span><span class="Delimiter">}</span>
<span id="L181" class="LineNr">181 </span>
<span id="L182" class="LineNr">182 </span><span class="Delimiter">:(scenario assume_screen_shows_up_in_errors)</span>
<span id="L183" class="LineNr">183 </span><span class="Special">% Hide_errors = true;</span>
<span id="L184" class="LineNr">184 </span><span class="muScenario"><a href='050scenario.cc.html#L57'>scenario</a></span> assume-screen-shows-up-in-errors [
<span id="L185" class="LineNr">185 </span>  assume-screen width<span class="Delimiter">,</span> <span class="Constant">5</span>
<span id="L186" class="LineNr">186 </span>]
<span id="L187" class="LineNr">187 </span><span class="traceContains">+error: assume-screen-shows-up-in-errors: missing type for 'width' in 'assume-screen width, 5'</span>
<span id="L188" class="LineNr">188 </span>
<span id="L189" class="LineNr">189 </span><span class="Comment">//: screen-should-contain is a regular instruction</span>
<span id="L190" class="LineNr">190 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L191" class="LineNr">191 </span>SCREEN_SHOULD_CONTAIN<span class="Delimiter">,</span>
<span id="L192" class="LineNr">192 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L193" class="LineNr">193 </span><a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span><span class="Special">Recipe_ordinal</span><span class="Delimiter">,</span> <span class="Constant">&quot;screen-should-contain&quot;</span><span class="Delimiter">,</span> SCREEN_SHOULD_CONTAIN<span class="Delimiter">);</span>
<span id="L194" class="LineNr">194 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L195" class="LineNr">195 </span><span class="Normal">case</span> SCREEN_SHOULD_CONTAIN: <span class="Delimiter">{</span>
<span id="L196" class="LineNr">196 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L197" class="LineNr">197 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special">Recipe</span><span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'screen-should-contain' requires exactly one ingredient, but got '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L198" class="LineNr">198 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L199" class="LineNr">199 </span>  <span class="Delimiter">}</span>
<span id="L200" class="LineNr">200 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L201" class="LineNr">201 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special">Recipe</span><span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'screen-should-contain' should be a literal string, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L202" class="LineNr">202 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L203" class="LineNr">203 </span>  <span class="Delimiter">}</span>
<span id="L204" class="LineNr">204 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L205" class="LineNr">205 </span><span class="Delimiter">}</span>
<span id="L206" class="LineNr">206 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L207" class="LineNr">207 </span><span class="Normal">case</span> SCREEN_SHOULD_CONTAIN: <span class="Delimiter">{</span>
<span id="L208" class="LineNr">208 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Passed</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L209" class="LineNr">209 </span>  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
<span id="L210" class="LineNr">210 </span>  check_screen<span class="Delimiter">(</span><a href='026call.cc.html#L89'>current_instruction</a><span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">,</span> -<span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L211" class="LineNr">211 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L212" class="LineNr">212 </span><span class="Delimiter">}</span>
<span id="L213" class="LineNr">213 </span>
<span id="L214" class="LineNr">214 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L215" class="LineNr">215 </span>SCREEN_SHOULD_CONTAIN_IN_COLOR<span class="Delimiter">,</span>
<span id="L216" class="LineNr">216 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L217" class="LineNr">217 </span><a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span><span class="Special">Recipe_ordinal</span><span class="Delimiter">,</span> <span class="Constant">&quot;screen-should-contain-in-color&quot;</span><span class="Delimiter">,</span> SCREEN_SHOULD_CONTAIN_IN_COLOR<span class="Delimiter">);</span>
<span id="L218" class="LineNr">218 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L219" class="LineNr">219 </span><span class="Normal">case</span> SCREEN_SHOULD_CONTAIN_IN_COLOR: <span class="Delimiter">{</span>
<span id="L220" class="LineNr">220 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L221" class="LineNr">221 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special">Recipe</span><span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'screen-should-contain-in-color' requires exactly two ingredients, but got '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L222" class="LineNr">222 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L223" class="LineNr">223 </span>  <span class="Delimiter">}</span>
<span id="L224" class="LineNr">224 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_number<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L225" class="LineNr">225 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special">Recipe</span><span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'screen-should-contain-in-color' should be a number (color code), but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L226" class="LineNr">226 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L227" class="LineNr">227 </span>  <span class="Delimiter">}</span>
<span id="L228" class="LineNr">228 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L229" class="LineNr">229 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span><span class="Special">Recipe</span><span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'screen-should-contain-in-color' should be a literal string, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L230" class="LineNr">230 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L231" class="LineNr">231 </span>  <span class="Delimiter">}</span>
<span id="L232" class="LineNr">232 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L233" class="LineNr">233 </span><span class="Delimiter">}</span>
<span id="L234" class="LineNr">234 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L235" class="LineNr">235 </span><span class="Normal">case</span> SCREEN_SHOULD_CONTAIN_IN_COLOR: <span class="Delimiter">{</span>
<span id="L236" class="LineNr">236 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Passed</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L237" class="LineNr">237 </span>  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
<span id="L238" class="LineNr">238 </span>  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)));</span>
<span id="L239" class="LineNr">239 </span>  check_screen<span class="Delimiter">(</span><a href='026call.cc.html#L89'>current_instruction</a><span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L240" class="LineNr">240 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L241" class="LineNr">241 </span><span class="Delimiter">}</span>
<span id="L242" class="LineNr">242 </span>
<span id="L243" class="LineNr">243 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span id="L244" class="LineNr">244 </span><span class="Comment">// scan an array of characters in a unicode-aware, bounds-checked manner</span>
<span id="L245" class="LineNr">245 </span><span class="Normal">struct</span> raw_string_stream <span class="Delimiter">{</span>
<span id="L246" class="LineNr">246 </span>  <span class="Normal">int</span> index<span class="Delimiter">;</span>
<span id="L247" class="LineNr">247 </span>  <span class="Normal">const</span> <span class="Normal">int</span> max<span class="Delimiter">;</span>
<span id="L248" class="LineNr">248 </span>  <span class="Normal">const</span> <span class="Normal">char</span>* buf<span class="Delimiter">;</span>
<span id="L249" class="LineNr">249 </span>
<span id="L250" class="LineNr">250 </span>  raw_string_stream<span class="Delimiter">(</span><span class="Normal">const</span> string&amp;<span class="Delimiter">);</span>
<span id="L251" class="LineNr">251 </span>  <span class="Normal">uint32_t</span> get<span class="Delimiter">();</span>  <span class="Comment">// unicode codepoint</span>
<span id="L252" class="LineNr">252 </span>  <span class="Normal">uint32_t</span> peek<span class="Delimiter">();</span>  <span class="Comment">// unicode codepoint</span>
<span id="L253" class="LineNr">253 </span>  <span class="Normal">bool</span> at_end<span class="Delimiter">()</span> <span class="Normal">const</span><span class="Delimiter">;</span>
<span id="L254" class="LineNr">254 </span>  <span class="Normal">void</span> <a href='011load.cc.html#L211'>skip_whitespace_and_comments</a><span class="Delimiter">();</span>
<span id="L255" class="LineNr">255 </span><span class="Delimiter">};</span>
<span id="L256" class="LineNr">256 </span>
<span id="L257" class="LineNr">257 </span><span class="Delimiter">:(code)</span>
<span id="L258" class="LineNr">258 </span><span class="Normal">void</span> check_screen<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; expected_contents<span class="Delimiter">,</span> <span class="Normal">const</span> <span class="Normal">int</span> color<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L259" class="LineNr">259 </span>  <span class="Normal">int</span> screen_location = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> SCREEN+<span class="Comment">/*</span><span class="Comment">skip <a href='043space.cc.html#L101'>address</a> alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">)</span> + <span class="Comment">/*</span><span class="Comment">skip payload alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L260" class="LineNr">260 </span>  reagent screen<span class="Delimiter">(</span><span class="Constant">&quot;x:screen&quot;</span><span class="Delimiter">);</span>  <span class="Comment">// just to ensure screen.type is reclaimed</span>
<span id="L261" class="LineNr">261 </span>  <span class="Normal">int</span> screen_data_location = <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;data&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>  <span class="Comment">// type: address:array:character</span>
<span id="L262" class="LineNr">262 </span>  assert<span class="Delimiter">(</span>screen_data_location &gt;= <span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L263" class="LineNr">263 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen data is at location &quot; &lt;&lt; screen_data_location &lt;&lt; '\n';</span>
<span id="L264" class="LineNr">264 </span>  <span class="Normal">int</span> screen_data_start = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> screen_data_location+<span class="Comment">/*</span><span class="Comment">skip <a href='043space.cc.html#L101'>address</a> alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">)</span> + <span class="Comment">/*</span><span class="Comment">skip payload alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  <span class="Comment">// type: array:character</span>
<span id="L265" class="LineNr">265 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen data start is at &quot; &lt;&lt; screen_data_start &lt;&lt; '\n';</span>
<span id="L266" class="LineNr">266 </span>  <span class="Normal">int</span> screen_width_location = <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;num-columns&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>
<span id="L267" class="LineNr">267 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen width is at location &quot; &lt;&lt; screen_width_location &lt;&lt; '\n';</span>
<span id="L268" class="LineNr">268 </span>  <span class="Normal">int</span> screen_width = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> screen_width_location<span class="Delimiter">);</span>
<span id="L269" class="LineNr">269 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen width: &quot; &lt;&lt; screen_width &lt;&lt; '\n';</span>
<span id="L270" class="LineNr">270 </span>  <span class="Normal">int</span> screen_height_location = <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;num-rows&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>
<span id="L271" class="LineNr">271 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen height is at location &quot; &lt;&lt; screen_height_location &lt;&lt; '\n';</span>
<span id="L272" class="LineNr">272 </span>  <span class="Normal">int</span> screen_height = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> screen_height_location<span class="Delimiter">);</span>
<span id="L273" class="LineNr">273 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen height: &quot; &lt;&lt; screen_height &lt;&lt; '\n';</span>
<span id="L274" class="LineNr">274 </span>  <span class="Normal">int</span> top_index_location= <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;top-idx&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>
<span id="L275" class="LineNr">275 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;top of screen is at location &quot; &lt;&lt; top_index_location &lt;&lt; '\n';</span>
<span id="L276" class="LineNr">276 </span>  <span class="Normal">int</span> top_index = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> top_index_location<span class="Delimiter">);</span>
<span id="L277" class="LineNr">277 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;top of screen is index &quot; &lt;&lt; top_index &lt;&lt; '\n';</span>
<span id="L278" class="LineNr">278 </span>  raw_string_stream cursor<span class="Delimiter">(</span>expected_contents<span class="Delimiter">);</span>
<span id="L279" class="LineNr">279 </span>  <span class="Comment">// todo: too-long expected_contents should fail</span>
<span id="L280" class="LineNr">280 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i=<span class="Constant">0</span><span class="Delimiter">,</span> row=top_index/screen_width<span class="Delimiter">;</span>  i &lt; screen_height<span class="Delimiter">;</span>  ++i<span class="Delimiter">,</span> row=<span class="Delimiter">(</span>row+<span class="Constant">1</span><span class="Delimiter">)</span>%screen_height<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L281" class="LineNr">281 </span>    cursor<span class="Delimiter">.</span><a href='011load.cc.html#L211'>skip_whitespace_and_comments</a><span class="Delimiter">();</span>
<span id="L282" class="LineNr">282 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>at_end<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L283" class="LineNr">283 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'.'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L284" class="LineNr">284 </span>      <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span><a href='026call.cc.html#L87'>current_recipe_name</a><span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;each row of the expected screen should start with a '.'\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L285" class="LineNr">285 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Scenario_testing_scenario</span><span class="Delimiter">)</span> <span class="Special">Passed</span> =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L286" class="LineNr">286 </span>      <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L287" class="LineNr">287 </span>    <span class="Delimiter">}</span>
<span id="L288" class="LineNr">288 </span>    <span class="Normal">int</span> addr = screen_data_start+<span class="Comment">/*</span><span class="Comment">length</span><span class="Comment">*/</span><span class="Constant">1</span>+row*screen_width* <span class="Comment">/*</span><span class="Comment">size of screen-cell</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">;</span>
<span id="L289" class="LineNr">289 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> column = <span class="Constant">0</span><span class="Delimiter">;</span>  column &lt; screen_width<span class="Delimiter">;</span>  ++column<span class="Delimiter">,</span> addr+= <span class="Comment">/*</span><span class="Comment">size of screen-cell</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L290" class="LineNr">290 </span>      <span class="Normal">const</span> <span class="Normal">int</span> cell_color_offset = <span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L291" class="LineNr">291 </span>      <span class="Normal">uint32_t</span> curr = cursor<span class="Delimiter">.</span>get<span class="Delimiter">();</span>
<span id="L292" class="LineNr">292 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">)</span> == <span class="Constant">0</span> &amp;&amp; isspace<span class="Delimiter">(</span>curr<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L293" class="LineNr">293 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>curr == <span class="Constant">' '</span> &amp;&amp; color != -<span class="Constant">1</span> &amp;&amp; color != <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr+cell_color_offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L294" class="LineNr">294 </span>        <span class="Comment">// filter out other colors</span>
<span id="L295" class="LineNr">295 </span>        <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L296" class="LineNr">296 </span>      <span class="Delimiter">}</span>
<span id="L297" class="LineNr">297 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">)</span> != <span class="Constant">0</span> &amp;&amp; <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">)</span> == curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L298" class="LineNr">298 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>color == -<span class="Constant">1</span> || color == <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr+cell_color_offset<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L299" class="LineNr">299 </span>        <span class="Comment">// contents match but color is off</span>
<span id="L300" class="LineNr">300 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Hide_errors</span><span class="Delimiter">)</span> cerr &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L301" class="LineNr">301 </span>        <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <span class="Constant">&quot;F - &quot;</span> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span><a href='026call.cc.html#L87'>current_recipe_name</a><span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;expected screen location (&quot;</span> &lt;&lt; row &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; column &lt;&lt; <span class="Constant">&quot;) to contain '&quot;</span> &lt;&lt; unicode_character_at<span class="Delimiter">(</span>addr<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;' in color &quot;</span> &lt;&lt; color &lt;&lt; <span class="Constant">&quot; instead of &quot;</span> &lt;&lt; no_scientific<span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr+cell_color_offset<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">&quot;\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L302" class="LineNr">302 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Hide_errors</span><span class="Delimiter">)</span> dump_screen<span class="Delimiter">();</span>
<span id="L303" class="LineNr">303 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Scenario_testing_scenario</span><span class="Delimiter">)</span> <span class="Special">Passed</span> =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L304" class="LineNr">304 </span>        <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L305" class="LineNr">305 </span>      <span class="Delimiter">}</span>
<span id="L306" class="LineNr">306 </span>
<span id="L307" class="LineNr">307 </span>      <span class="Comment">// really a mismatch</span>
<span id="L308" class="LineNr">308 </span>      <span class="Comment">// can't print multi-byte unicode characters in errors just yet. not very useful for debugging anyway.</span>
<span id="L309" class="LineNr">309 </span>      <span class="Normal">char</span> expected_pretty[<span class="Constant">10</span>] = <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">};</span>
<span id="L310" class="LineNr">310 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>curr &lt; <span class="Constant">256</span> &amp;&amp; !iscntrl<span class="Delimiter">(</span>curr<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L311" class="LineNr">311 </span>        <span class="Comment">// &quot; ('&lt;curr&gt;')&quot;</span>
<span id="L312" class="LineNr">312 </span>        expected_pretty[<span class="Constant">0</span>] = <span class="Constant">' '</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">1</span>] = <span class="Constant">'('</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">2</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">3</span>] = <span class="Normal">static_cast</span>&lt;<span class="Normal">unsigned</span> <span class="Normal">char</span>&gt;<span class="Delimiter">(</span>curr<span class="Delimiter">),</span> expected_pretty[<span class="Constant">4</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">5</span>] = <span class="Constant">')'</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">6</span>] = <span class="cSpecial">'\0'</span><span class="Delimiter">;</span>
<span id="L313" class="LineNr">313 </span>      <span class="Delimiter">}</span>
<span id="L314" class="LineNr">314 </span>      <span class="Normal">char</span> actual_pretty[<span class="Constant">10</span>] = <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">};</span>
<span id="L315" class="LineNr">315 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">)</span> &lt; <span class="Constant">256</span> &amp;&amp; !iscntrl<span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L316" class="LineNr">316 </span>        <span class="Comment">// &quot; ('&lt;curr&gt;')&quot;</span>
<span id="L317" class="LineNr">317 </span>        actual_pretty[<span class="Constant">0</span>] = <span class="Constant">' '</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">1</span>] = <span class="Constant">'('</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">2</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">3</span>] = <span class="Normal">static_cast</span>&lt;<span class="Normal">unsigned</span> <span class="Normal">char</span>&gt;<span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">)),</span> actual_pretty[<span class="Constant">4</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">5</span>] = <span class="Constant">')'</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">6</span>] = <span class="cSpecial">'\0'</span><span class="Delimiter">;</span>
<span id="L318" class="LineNr">318 </span>      <span class="Delimiter">}</span>
<span id="L319" class="LineNr">319 </span>
<span id="L320" class="LineNr">320 </span>      ostringstream color_phrase<span class="Delimiter">;</span>
<span id="L321" class="LineNr">321 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>color != -<span class="Constant">1</span><span class="Delimiter">)</span> color_phrase &lt;&lt; <span class="Constant">&quot; in color &quot;</span> &lt;&lt; color<span class="Delimiter">;</span>
<span id="L322" class="LineNr">322 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Hide_errors</span><span class="Delimiter">)</span> cerr &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L323" class="LineNr">323 </span>      <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <span class="Constant">&quot;F - &quot;</span> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span><a href='026call.cc.html#L87'>current_recipe_name</a><span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;expected screen location (&quot;</span> &lt;&lt; row &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; column &lt;&lt; <span class="Constant">&quot;) to contain &quot;</span> &lt;&lt; curr &lt;&lt; expected_pretty &lt;&lt; color_phrase<span class="Delimiter">.</span>str<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot; instead of &quot;</span> &lt;&lt; no_scientific<span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">))</span> &lt;&lt; actual_pretty &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L324" class="LineNr">324 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Hide_errors</span><span class="Delimiter">)</span> dump_screen<span class="Delimiter">();</span>
<span id="L325" class="LineNr">325 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Scenario_testing_scenario</span><span class="Delimiter">)</span> <span class="Special">Passed</span> =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L326" class="LineNr">326 </span>      <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L327" class="LineNr">327 </span>    <span class="Delimiter">}</span>
<span id="L328" class="LineNr">328 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'.'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L329" class="LineNr">329 </span>      <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span><a href='026call.cc.html#L87'>current_recipe_name</a><span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;row &quot;</span> &lt;&lt; row &lt;&lt; <span class="Constant">&quot; of the expected screen is too long\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L330" class="LineNr">330 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!<span class="Special">Scenario_testing_scenario</span><span class="Delimiter">)</span> <span class="Special">Passed</span> =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L331" class="LineNr">331 </span>      <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L332" class="LineNr">332 </span>    <span class="Delimiter">}</span>
<span id="L333" class="LineNr">333 </span>  <span class="Delimiter">}</span>
<span id="L334" class="LineNr">334 </span>  cursor<span class="Delimiter">.</span><a href='011load.cc.html#L211'>skip_whitespace_and_comments</a><span class="Delimiter">();</span>
<span id="L335" class="LineNr">335 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!cursor<span class="Delimiter">.</span>at_end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L336" class="LineNr">336 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span><a href='026call.cc.html#L87'>current_recipe_name</a><span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;expected screen has too many rows\n&quot;</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L337" class="LineNr">337 </span>    <span class="Special">Passed</span> =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L338" class="LineNr">338 </span>  <span class="Delimiter">}</span>
<span id="L339" class="LineNr">339 </span><span class="Delimiter">}</span>
<span id="L340" class="LineNr">340 </span>
<span id="L341" class="LineNr">341 </span><span class="Normal">const</span> <span class="Normal">char</span>* unicode_character_at<span class="Delimiter">(</span><span class="Normal">int</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L342" class="LineNr">342 </span>  <span class="Normal">int</span> unicode_code_point = <span class="Normal">static_cast</span>&lt;<span class="Normal">int</span>&gt;<span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> addr<span class="Delimiter">));</span>
<span id="L343" class="LineNr">343 </span>  <span class="Identifier">return</span> to_unicode<span class="Delimiter">(</span>unicode_code_point<span class="Delimiter">);</span>
<span id="L344" class="LineNr">344 </span><span class="Delimiter">}</span>
<span id="L345" class="LineNr">345 </span>
<span id="L346" class="LineNr">346 </span>raw_string_stream::raw_string_stream<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; backing<span class="Delimiter">)</span> :index<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">),</span> max<span class="Delimiter">(</span><a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>backing<span class="Delimiter">)),</span> buf<span class="Delimiter">(</span>backing<span class="Delimiter">.</span>c_str<span class="Delimiter">())</span> <span class="Delimiter">{}</span>
<span id="L347" class="LineNr">347 </span>
<span id="L348" class="LineNr">348 </span><span class="Normal">bool</span> raw_string_stream::at_end<span class="Delimiter">()</span> <span class="Normal">const</span> <span class="Delimiter">{</span>
<span id="L349" class="LineNr">349 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>index &gt;= max<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L350" class="LineNr">350 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>tb_utf8_char_length<span class="Delimiter">(</span>buf[index]<span class="Delimiter">)</span> &gt; max-index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L351" class="LineNr">351 </span>    <a href='003trace.cc.html#L196'>raise</a> &lt;&lt; <span class="Constant">&quot;unicode string seems corrupted at index &quot;</span>&lt;&lt; index &lt;&lt; <span class="Constant">&quot; character &quot;</span> &lt;&lt; <span class="Normal">static_cast</span>&lt;<span class="Normal">int</span>&gt;<span class="Delimiter">(</span>buf[index]<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; <a href='003trace.cc.html#L225'>end</a><span class="Delimiter">();</span>
<span id="L352" class="LineNr">352 </span>    <span class="Identifier">return</span><span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L353" class="LineNr">353 </span>  <span class="Delimiter">}</span>
<span id="L354" class="LineNr">354 </span>  <span class="Identifier">return</span><span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L355" class="LineNr">355 </span><span class="Delimiter">}</span>
<span id="L356" class="LineNr">356 </span>
<span id="L357" class="LineNr">357 </span><span class="Normal">uint32_t</span> raw_string_stream::get<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L358" class="LineNr">358 </span>  assert<span class="Delimiter">(</span>index &lt; max<span class="Delimiter">);</span>  <span class="Comment">// caller must check bounds before calling 'get'</span>
<span id="L359" class="LineNr">359 </span>  <span class="Normal">uint32_t</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L360" class="LineNr">360 </span>  <span class="Normal">int</span> length = tb_utf8_char_to_unicode<span class="Delimiter">(</span>&amp;result<span class="Delimiter">,</span> &amp;buf[index]<span class="Delimiter">);</span>
<span id="L361" class="LineNr">361 </span>  assert<span class="Delimiter">(</span>length != TB_EOF<span class="Delimiter">);</span>
<span id="L362" class="LineNr">362 </span>  index += length<span class="Delimiter">;</span>
<span id="L363" class="LineNr">363 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L364" class="LineNr">364 </span><span class="Delimiter">}</span>
<span id="L365" class="LineNr">365 </span>
<span id="L366" class="LineNr">366 </span><span class="Normal">uint32_t</span> raw_string_stream::peek<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L367" class="LineNr">367 </span>  assert<span class="Delimiter">(</span>index &lt; max<span class="Delimiter">);</span>  <span class="Comment">// caller must check bounds before calling 'get'</span>
<span id="L368" class="LineNr">368 </span>  <span class="Normal">uint32_t</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L369" class="LineNr">369 </span>  <span class="Normal">int</span> length = tb_utf8_char_to_unicode<span class="Delimiter">(</span>&amp;result<span class="Delimiter">,</span> &amp;buf[index]<span class="Delimiter">);</span>
<span id="L370" class="LineNr">370 </span>  assert<span class="Delimiter">(</span>length != TB_EOF<span class="Delimiter">);</span>
<span id="L371" class="LineNr">371 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L372" class="LineNr">372 </span><span class="Delimiter">}</span>
<span id="L373" class="LineNr">373 </span>
<span id="L374" class="LineNr">374 </span><span class="Normal">void</span> raw_string_stream::<a href='011load.cc.html#L211'>skip_whitespace_and_comments</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L375" class="LineNr">375 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span>!at_end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L376" class="LineNr">376 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>peek<span class="Delimiter">()))</span> get<span class="Delimiter">();</span>
<span id="L377" class="LineNr">377 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>peek<span class="Delimiter">()</span> == <span class="Constant">'#'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L378" class="LineNr">378 </span>      <span class="Comment">// skip comment</span>
<span id="L379" class="LineNr">379 </span>      get<span class="Delimiter">();</span>
<span id="L380" class="LineNr">380 </span>      <span class="Normal">while</span> <span class="Delimiter">(</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> get<span class="Delimiter">();</span>  <span class="Comment">// implicitly also handles CRLF</span>
<span id="L381" class="LineNr">381 </span>    <span class="Delimiter">}</span>
<span id="L382" class="LineNr">382 </span>    <span class="Normal">else</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L383" class="LineNr">383 </span>  <span class="Delimiter">}</span>
<span id="L384" class="LineNr">384 </span><span class="Delimiter">}</span>
<span id="L385" class="LineNr">385 </span>
<span id="L386" class="LineNr">386 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L387" class="LineNr">387 </span>_DUMP_SCREEN<span class="Delimiter">,</span>
<span id="L388" class="LineNr">388 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L389" class="LineNr">389 </span><a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span><span class="Special">Recipe_ordinal</span><span class="Delimiter">,</span> <span class="Constant">&quot;$dump-screen&quot;</span><span class="Delimiter">,</span> _DUMP_SCREEN<span class="Delimiter">);</span>
<span id="L390" class="LineNr">390 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L391" class="LineNr">391 </span><span class="Normal">case</span> _DUMP_SCREEN: <span class="Delimiter">{</span>
<span id="L392" class="LineNr">392 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L393" class="LineNr">393 </span><span class="Delimiter">}</span>
<span id="L394" class="LineNr">394 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L395" class="LineNr">395 </span><span class="Normal">case</span> _DUMP_SCREEN: <span class="Delimiter">{</span>
<span id="L396" class="LineNr">396 </span>  dump_screen<span class="Delimiter">();</span>
<span id="L397" class="LineNr">397 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L398" class="LineNr">398 </span><span class="Delimiter">}</span>
<span id="L399" class="LineNr">399 </span>
<span id="L400" class="LineNr">400 </span><span class="Delimiter">:(code)</span>
<span id="L401" class="LineNr">401 </span><span class="Normal">void</span> dump_screen<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L402" class="LineNr">402 </span>  <span class="Normal">int</span> screen_location = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> SCREEN+<span class="Comment">/*</span><span class="Comment">skip <a href='043space.cc.html#L101'>address</a> alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">)</span> + <span class="Comment">/*</span><span class="Comment">skip payload alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L403" class="LineNr">403 </span>  reagent screen<span class="Delimiter">(</span><span class="Constant">&quot;x:screen&quot;</span><span class="Delimiter">);</span>  <span class="Comment">// just to ensure screen.type is reclaimed</span>
<span id="L404" class="LineNr">404 </span>  <span class="Normal">int</span> screen_data_location = <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;data&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>  <span class="Comment">// type: address:array:character</span>
<span id="L405" class="LineNr">405 </span>  assert<span class="Delimiter">(</span>screen_data_location &gt;= <span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L406" class="LineNr">406 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen data is at location &quot; &lt;&lt; screen_data_location &lt;&lt; '\n';</span>
<span id="L407" class="LineNr">407 </span>  <span class="Normal">int</span> screen_data_start = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> screen_data_location+<span class="Comment">/*</span><span class="Comment">skip <a href='043space.cc.html#L101'>address</a> alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">)</span> + <span class="Comment">/*</span><span class="Comment">skip payload alloc id</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  <span class="Comment">// type: array:character</span>
<span id="L408" class="LineNr">408 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen data start is at &quot; &lt;&lt; screen_data_start &lt;&lt; '\n';</span>
<span id="L409" class="LineNr">409 </span>  <span class="Normal">int</span> screen_width_location = <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;num-columns&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>
<span id="L410" class="LineNr">410 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen width is at location &quot; &lt;&lt; screen_width_location &lt;&lt; '\n';</span>
<span id="L411" class="LineNr">411 </span>  <span class="Normal">int</span> screen_width = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> screen_width_location<span class="Delimiter">);</span>
<span id="L412" class="LineNr">412 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen width: &quot; &lt;&lt; screen_width &lt;&lt; '\n';</span>
<span id="L413" class="LineNr">413 </span>  <span class="Normal">int</span> screen_height_location = <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;num-rows&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>
<span id="L414" class="LineNr">414 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen height is at location &quot; &lt;&lt; screen_height_location &lt;&lt; '\n';</span>
<span id="L415" class="LineNr">415 </span>  <span class="Normal">int</span> screen_height = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> screen_height_location<span class="Delimiter">);</span>
<span id="L416" class="LineNr">416 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;screen height: &quot; &lt;&lt; screen_height &lt;&lt; '\n';</span>
<span id="L417" class="LineNr">417 </span>  <span class="Normal">int</span> top_index_location= <a href='042name.cc.html#L148'>find_element_location</a><span class="Delimiter">(</span>screen_location<span class="Delimiter">,</span> <span class="Constant">&quot;top-idx&quot;</span><span class="Delimiter">,</span> screen<span class="Delimiter">.</span>type<span class="Delimiter">,</span> <span class="Constant">&quot;check_screen&quot;</span><span class="Delimiter">);</span>
<span id="L418" class="LineNr">418 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;top of screen is at location &quot; &lt;&lt; top_index_location &lt;&lt; '\n';</span>
<span id="L419" class="LineNr">419 </span>  <span class="Normal">int</span> top_index = <a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> top_index_location<span class="Delimiter">);</span>
<span id="L420" class="LineNr">420 </span><span class="CommentedCode">//?   cerr &lt;&lt; &quot;top of screen is index &quot; &lt;&lt; top_index &lt;&lt; '\n';</span>
<span id="L421" class="LineNr">421 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i=<span class="Constant">0</span><span class="Delimiter">,</span> row=top_index/screen_width<span class="Delimiter">;</span>  i &lt; screen_height<span class="Delimiter">;</span>  ++i<span class="Delimiter">,</span> row=<span class="Delimiter">(</span>row+<span class="Constant">1</span><span class="Delimiter">)</span>%screen_height<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L422" class="LineNr">422 </span>    cerr &lt;&lt; <span class="Constant">'.'</span><span class="Delimiter">;</span>
<span id="L423" class="LineNr">423 </span>    <span class="Normal">int</span> curr = screen_data_start+<span class="Comment">/*</span><span class="Comment">length</span><span class="Comment">*/</span><span class="Constant">1</span>+row*screen_width* <span class="Comment">/*</span><span class="Comment">size of screen-cell</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">;</span>
<span id="L424" class="LineNr">424 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> col = <span class="Constant">0</span><span class="Delimiter">;</span>  col &lt; screen_width<span class="Delimiter">;</span>  ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L425" class="LineNr">425 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> curr<span class="Delimiter">))</span>
<span id="L426" class="LineNr">426 </span>        cerr &lt;&lt; to_unicode<span class="Delimiter">(</span><span class="Normal">static_cast</span>&lt;<span class="Normal">uint32_t</span>&gt;<span class="Delimiter">(</span><a href='001help.cc.html#L229'>get_or_insert</a><span class="Delimiter">(</span><span class="Special">Memory</span><span class="Delimiter">,</span> curr<span class="Delimiter">)));</span>
<span id="L427" class="LineNr">427 </span>      <span class="Normal">else</span>
<span id="L428" class="LineNr">428 </span>        cerr &lt;&lt; <span class="Constant">' '</span><span class="Delimiter">;</span>
<span id="L429" class="LineNr">429 </span>      curr += <span class="Comment">/*</span><span class="Comment">size of screen-cell</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">;</span>
<span id="L430" class="LineNr">430 </span>    <span class="Delimiter">}</span>
<span id="L431" class="LineNr">431 </span>    cerr &lt;&lt; <span class="Constant">&quot;.\n&quot;</span><span class="Delimiter">;</span>
<span id="L432" class="LineNr">432 </span>  <span class="Delimiter">}</span>
<span id="L433" class="LineNr">433 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-08-21 07:31:21 +0000