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<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Let's raise errors when students use real hardware in any functions</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment">//: besides 'main'. Part of the goal is to teach them testing hygiene and</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment">//: dependency injection.</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment">//:</span>
<span id="L5" class="LineNr"> 5 </span><span class="Comment">//: This is easy to sidestep, it's for feedback rather than safety.</span>
<span id="L6" class="LineNr"> 6 </span>
<span id="L7" class="LineNr"> 7 </span><span class="Delimiter">:(before "End Globals")</span>
<span id="L8" class="LineNr"> 8 </span>vector<type_tree*> Real_hardware_types<span class="Delimiter">;</span>
<span id="L9" class="LineNr"> 9 </span><span class="Delimiter">:(before "Begin transform_all")</span>
<span id="L10" class="LineNr">10 </span><a href='099hardware_checks.cc.html#L14'>setup_real_hardware_types</a><span class="Delimiter">();</span>
<span id="L11" class="LineNr">11 </span><span class="Delimiter">:(before "End transform_all")</span>
<span id="L12" class="LineNr">12 </span><a href='099hardware_checks.cc.html#L25'>teardown_real_hardware_types</a><span class="Delimiter">();</span>
<span id="L13" class="LineNr">13 </span><span class="Delimiter">:(code)</span>
<span id="L14" class="LineNr">14 </span><span class="Normal">void</span> <a href='099hardware_checks.cc.html#L14'>setup_real_hardware_types</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L15" class="LineNr">15 </span> Real_hardware_types<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='099hardware_checks.cc.html#L19'>parse_type</a><span class="Delimiter">(</span><span class="Constant">"address:screen"</span><span class="Delimiter">));</span>
<span id="L16" class="LineNr">16 </span> Real_hardware_types<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='099hardware_checks.cc.html#L19'>parse_type</a><span class="Delimiter">(</span><span class="Constant">"address:console"</span><span class="Delimiter">));</span>
<span id="L17" class="LineNr">17 </span> Real_hardware_types<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='099hardware_checks.cc.html#L19'>parse_type</a><span class="Delimiter">(</span><span class="Constant">"address:resources"</span><span class="Delimiter">));</span>
<span id="L18" class="LineNr">18 </span><span class="Delimiter">}</span>
<span id="L19" class="LineNr">19 </span>type_tree* <a href='099hardware_checks.cc.html#L19'>parse_type</a><span class="Delimiter">(</span>string s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L20" class="LineNr">20 </span> reagent x<span class="Delimiter">(</span><span class="Constant">"x:"</span>+s<span class="Delimiter">);</span>
<span id="L21" class="LineNr">21 </span> type_tree* result = x<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
<span id="L22" class="LineNr">22 </span> x<span class="Delimiter">.</span>type = <span class="Constant">NULL</span><span class="Delimiter">;</span> <span class="Comment">// don't deallocate on return</span>
<span id="L23" class="LineNr">23 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L24" class="LineNr">24 </span><span class="Delimiter">}</span>
<span id="L25" class="LineNr">25 </span><span class="Normal">void</span> <a href='099hardware_checks.cc.html#L25'>teardown_real_hardware_types</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L26" class="LineNr">26 </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> i < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>Real_hardware_types<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
<span id="L27" class="LineNr">27 </span> <span class="Conceal">¦</span> <span class="Normal">delete</span> Real_hardware_types<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L28" class="LineNr">28 </span> Real_hardware_types<span class="Delimiter">.</span><a href='050scenario.cc.html#L60'>clear</a><span class="Delimiter">();</span>
<span id="L29" class="LineNr">29 </span><span class="Delimiter">}</span>
<span id="L30" class="LineNr">30 </span>
<span id="L31" class="LineNr">31 </span><span class="Delimiter">:(before "End Checks")</span>
<span id="L32" class="LineNr">32 </span>Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='099hardware_checks.cc.html#L34'>check_for_misuse_of_real_hardware</a><span class="Delimiter">);</span>
<span id="L33" class="LineNr">33 </span><span class="Delimiter">:(code)</span>
<span id="L34" class="LineNr">34 </span><span class="Normal">void</span> <a href='099hardware_checks.cc.html#L34'>check_for_misuse_of_real_hardware</a><span class="Delimiter">(</span><span class="Normal">const</span> <a href='010vm.cc.html#L14'>recipe_ordinal</a> r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L35" class="LineNr">35 </span> <span class="Normal">const</span> recipe& caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
<span id="L36" class="LineNr">36 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name == <span class="Constant">"main"</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L37" class="LineNr">37 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L74'>starts_with</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">,</span> <span class="Constant">"scenario_"</span><span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L38" class="LineNr">38 </span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"--- check if <a href='010vm.cc.html#L19'>recipe</a> "</span> << caller<span class="Delimiter">.</span>name << <span class="Constant">" has any dependency-injection mistakes"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L39" class="LineNr">39 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span> index < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L40" class="LineNr">40 </span> <span class="Conceal">¦</span> <span class="Normal">const</span> instruction& inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
<span id="L41" class="LineNr">41 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation < <a href='010vm.cc.html#L191'>MAX_PRIMITIVE_RECIPES</a><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L42" class="LineNr">42 </span> <span class="Conceal">¦</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> i < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L43" class="LineNr">43 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">const</span> reagent& ing = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L44" class="LineNr">44 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>ing<span class="Delimiter">)</span> || ing<span class="Delimiter">.</span>name != <span class="Constant">"0"</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L45" class="LineNr">45 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">const</span> recipe& callee = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>operation<span class="Delimiter">);</span>
<span id="L46" class="LineNr">46 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!callee<span class="Delimiter">.</span>has_header<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L47" class="LineNr">47 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>i >= <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>callee<span class="Delimiter">.</span>ingredients<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L48" class="LineNr">48 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">const</span> reagent& expected_ing = callee<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L49" class="LineNr">49 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span> j < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>Real_hardware_types<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L50" class="LineNr">50 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>*Real_hardware_types<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">)</span> == *expected_ing<span class="Delimiter">.</span>type<span class="Delimiter">)</span>
<span id="L51" class="LineNr">51 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"': only 'main' can pass 0 into a "</span> << <a href='028call_return.cc.html#L158'>to_string</a><span class="Delimiter">(</span>expected_ing<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L52" class="LineNr">52 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L53" class="LineNr">53 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L54" class="LineNr">54 </span> <span class="Delimiter">}</span>
<span id="L55" class="LineNr">55 </span><span class="Delimiter">}</span>
<span id="L56" class="LineNr">56 </span>
<span id="L57" class="LineNr">57 </span><span class="Delimiter">:(scenarios transform)</span>
<span id="L58" class="LineNr">58 </span><span class="Delimiter">:(scenario warn_on_using_real_screen_directly_in_non_main_recipe)</span>
<span id="L59" class="LineNr">59 </span><span class="Special">% Hide_errors = true;</span>
<span id="L60" class="LineNr">60 </span><span class="muRecipe">def</span> foo [
<span id="L61" class="LineNr">61 </span> print <span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">34</span>
<span id="L62" class="LineNr">62 </span>]
<span id="L63" class="LineNr">63 </span><span class="traceContains">+error: foo: 'print 0, 34': only 'main' can pass 0 into a (address screen)</span>
</pre>
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