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Diffstat (limited to 'html/028call_return.cc.html')
| -rw-r--r-- | html/028call_return.cc.html | 344 |
1 files changed, 172 insertions, 172 deletions
diff --git a/html/028call_return.cc.html b/html/028call_return.cc.html index d65f69fb..f694cd68 100644 --- a/html/028call_return.cc.html +++ b/html/028call_return.cc.html @@ -57,178 +57,178 @@ if ('onhashchange' in window) { </head> <body onload='JumpToLine();'> <pre id='vimCodeElement'> -<a name="L1"></a><span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Calls can also generate products, using 'reply' or 'return'.</span> -<a name="L2"></a><span id="L2" class="LineNr"> 2 </span> -<a name="L3"></a><span id="L3" class="LineNr"> 3 </span><span class="Delimiter">:(scenario return)</span> -<a name="L4"></a><span id="L4" class="LineNr"> 4 </span><span class="muRecipe">def</span> main [ -<a name="L5"></a><span id="L5" class="LineNr"> 5 </span> <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">2</span>:num<span class="Special"> <- </span>f <span class="Constant">34</span> -<a name="L6"></a><span id="L6" class="LineNr"> 6 </span>] -<a name="L7"></a><span id="L7" class="LineNr"> 7 </span><span class="muRecipe">def</span> f [ -<a name="L8"></a><span id="L8" class="LineNr"> 8 </span> <span class="Constant">12</span>:num<span class="Special"> <- </span>next-ingredient -<a name="L9"></a><span id="L9" class="LineNr"> 9 </span> <span class="Constant">13</span>:num<span class="Special"> <- </span>add <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">12</span>:num -<a name="L10"></a><span id="L10" class="LineNr"> 10 </span> <span class="Identifier">return</span> <span class="Constant">12</span>:num<span class="Delimiter">,</span> <span class="Constant">13</span>:num -<a name="L11"></a><span id="L11" class="LineNr"> 11 </span>] -<a name="L12"></a><span id="L12" class="LineNr"> 12 </span><span class="traceContains">+mem: storing 34 in location 1</span> -<a name="L13"></a><span id="L13" class="LineNr"> 13 </span><span class="traceContains">+mem: storing 35 in location 2</span> -<a name="L14"></a><span id="L14" class="LineNr"> 14 </span> -<a name="L15"></a><span id="L15" class="LineNr"> 15 </span><span class="Delimiter">:(scenario reply)</span> -<a name="L16"></a><span id="L16" class="LineNr"> 16 </span><span class="muRecipe">def</span> main [ -<a name="L17"></a><span id="L17" class="LineNr"> 17 </span> <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">2</span>:num<span class="Special"> <- </span>f <span class="Constant">34</span> -<a name="L18"></a><span id="L18" class="LineNr"> 18 </span>] -<a name="L19"></a><span id="L19" class="LineNr"> 19 </span><span class="muRecipe">def</span> f [ -<a name="L20"></a><span id="L20" class="LineNr"> 20 </span> <span class="Constant">12</span>:num<span class="Special"> <- </span>next-ingredient -<a name="L21"></a><span id="L21" class="LineNr"> 21 </span> <span class="Constant">13</span>:num<span class="Special"> <- </span>add <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">12</span>:num -<a name="L22"></a><span id="L22" class="LineNr"> 22 </span> reply <span class="Constant">12</span>:num<span class="Delimiter">,</span> <span class="Constant">13</span>:num -<a name="L23"></a><span id="L23" class="LineNr"> 23 </span>] -<a name="L24"></a><span id="L24" class="LineNr"> 24 </span><span class="traceContains">+mem: storing 34 in location 1</span> -<a name="L25"></a><span id="L25" class="LineNr"> 25 </span><span class="traceContains">+mem: storing 35 in location 2</span> -<a name="L26"></a><span id="L26" class="LineNr"> 26 </span> -<a name="L27"></a><span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> -<a name="L28"></a><span id="L28" class="LineNr"> 28 </span>RETURN<span class="Delimiter">,</span> -<a name="L29"></a><span id="L29" class="LineNr"> 29 </span><span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> -<a name="L30"></a><span id="L30" class="LineNr"> 30 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"return"</span><span class="Delimiter">,</span> RETURN<span class="Delimiter">);</span> -<a name="L31"></a><span id="L31" class="LineNr"> 31 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"reply"</span><span class="Delimiter">,</span> RETURN<span class="Delimiter">);</span> <span class="Comment">// synonym while teaching</span> -<a name="L32"></a><span id="L32" class="LineNr"> 32 </span><span class="Delimiter">:(before "End Primitive Recipe Checks")</span> -<a name="L33"></a><span id="L33" class="LineNr"> 33 </span><span class="Normal">case</span> RETURN: <span class="Delimiter">{</span> -<a name="L34"></a><span id="L34" class="LineNr"> 34 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// checks will be performed by a transform below</span> -<a name="L35"></a><span id="L35" class="LineNr"> 35 </span><span class="Delimiter">}</span> -<a name="L36"></a><span id="L36" class="LineNr"> 36 </span><span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> -<a name="L37"></a><span id="L37" class="LineNr"> 37 </span><span class="Normal">case</span> RETURN: <span class="Delimiter">{</span> -<a name="L38"></a><span id="L38" class="LineNr"> 38 </span> <span class="Comment">// Starting Reply</span> -<a name="L39"></a><span id="L39" class="LineNr"> 39 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_stream<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L40"></a><span id="L40" class="LineNr"> 40 </span> trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"trace"</span><span class="Delimiter">)</span> << current_instruction<span class="Delimiter">().</span>name << <span class="Constant">": decrementing callstack depth from "</span> << Trace_stream<span class="Delimiter">-></span>callstack_depth << end<span class="Delimiter">();</span> -<a name="L41"></a><span id="L41" class="LineNr"> 41 </span> --Trace_stream<span class="Delimiter">-></span>callstack_depth<span class="Delimiter">;</span> -<a name="L42"></a><span id="L42" class="LineNr"> 42 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-></span>callstack_depth < <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L43"></a><span id="L43" class="LineNr"> 43 </span> Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>clear<span class="Delimiter">();</span> -<a name="L44"></a><span id="L44" class="LineNr"> 44 </span> <span class="Identifier">goto</span> stop_running_current_routine<span class="Delimiter">;</span> -<a name="L45"></a><span id="L45" class="LineNr"> 45 </span> <span class="Delimiter">}</span> -<a name="L46"></a><span id="L46" class="LineNr"> 46 </span> <span class="Delimiter">}</span> -<a name="L47"></a><span id="L47" class="LineNr"> 47 </span> Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>pop_front<span class="Delimiter">();</span> -<a name="L48"></a><span id="L48" class="LineNr"> 48 </span> <span class="Comment">// just in case 'main' returns a value, drop it for now</span> -<a name="L49"></a><span id="L49" class="LineNr"> 49 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">goto</span> stop_running_current_routine<span class="Delimiter">;</span> -<a name="L50"></a><span id="L50" class="LineNr"> 50 </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 < SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> -<a name="L51"></a><span id="L51" class="LineNr"> 51 </span> trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"result "</span> << i << <span class="Constant">" is "</span> << to_string<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> << end<span class="Delimiter">();</span> -<a name="L52"></a><span id="L52" class="LineNr"> 52 </span> <span class="Comment">// make return products available to caller</span> -<a name="L53"></a><span id="L53" class="LineNr"> 53 </span> copy<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> ingredients<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> inserter<span class="Delimiter">(</span>products<span class="Delimiter">,</span> products<span class="Delimiter">.</span>begin<span class="Delimiter">()));</span> -<a name="L54"></a><span id="L54" class="LineNr"> 54 </span> <span class="Comment">// End Reply</span> -<a name="L55"></a><span id="L55" class="LineNr"> 55 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// continue to process rest of *caller* instruction</span> -<a name="L56"></a><span id="L56" class="LineNr"> 56 </span><span class="Delimiter">}</span> -<a name="L57"></a><span id="L57" class="LineNr"> 57 </span> -<a name="L58"></a><span id="L58" class="LineNr"> 58 </span><span class="Comment">//: Types in return instructions are checked ahead of time.</span> -<a name="L59"></a><span id="L59" class="LineNr"> 59 </span> -<a name="L60"></a><span id="L60" class="LineNr"> 60 </span><span class="Delimiter">:(before "End Checks")</span> -<a name="L61"></a><span id="L61" class="LineNr"> 61 </span>Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_types_of_return_instructions<span class="Delimiter">);</span> <span class="Comment">// idempotent</span> -<a name="L62"></a><span id="L62" class="LineNr"> 62 </span><span class="Delimiter">:(code)</span> -<a name="L63"></a><span id="L63" class="LineNr"> 63 </span><span class="Normal">void</span> check_types_of_return_instructions<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L64"></a><span id="L64" class="LineNr"> 64 </span> <span class="Normal">const</span> recipe& caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span> -<a name="L65"></a><span id="L65" class="LineNr"> 65 </span> trace<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 types of return instructions in recipe "</span> << caller<span class="Delimiter">.</span>name << end<span class="Delimiter">();</span> -<a name="L66"></a><span id="L66" class="LineNr"> 66 </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 < SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L67"></a><span id="L67" class="LineNr"> 67 </span> <span class="Normal">const</span> instruction& caller_instruction = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> -<a name="L68"></a><span id="L68" class="LineNr"> 68 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>is_label<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> -<a name="L69"></a><span id="L69" class="LineNr"> 69 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> -<a name="L70"></a><span id="L70" class="LineNr"> 70 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>operation < MAX_PRIMITIVE_RECIPES<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> -<a name="L71"></a><span id="L71" class="LineNr"> 71 </span> <span class="Normal">const</span> recipe& callee = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> caller_instruction<span class="Delimiter">.</span>operation<span class="Delimiter">);</span> -<a name="L72"></a><span id="L72" class="LineNr"> 72 </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 < SIZE<span class="Delimiter">(</span>callee<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L73"></a><span id="L73" class="LineNr"> 73 </span> <span class="Normal">const</span> instruction& return_inst = callee<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> -<a name="L74"></a><span id="L74" class="LineNr"> 74 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>operation != RETURN<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> -<a name="L75"></a><span id="L75" class="LineNr"> 75 </span> <span class="Comment">// check types with the caller</span> -<a name="L76"></a><span id="L76" class="LineNr"> 76 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">)</span> > SIZE<span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">))</span> <span class="Delimiter">{</span> -<a name="L77"></a><span id="L77" class="LineNr"> 77 </span> raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"too few values returned from "</span> << callee<span class="Delimiter">.</span>name << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> -<a name="L78"></a><span id="L78" class="LineNr"> 78 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<a name="L79"></a><span id="L79" class="LineNr"> 79 </span> <span class="Delimiter">}</span> -<a name="L80"></a><span id="L80" class="LineNr"> 80 </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 < SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L81"></a><span id="L81" class="LineNr"> 81 </span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> lhs = return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> -<a name="L82"></a><span id="L82" class="LineNr"> 82 </span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> rhs = caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> -<a name="L83"></a><span id="L83" class="LineNr"> 83 </span> <span class="Comment">// End Check RETURN Copy(lhs, rhs)</span> -<a name="L84"></a><span id="L84" class="LineNr"> 84 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>rhs<span class="Delimiter">,</span> lhs<span class="Delimiter">))</span> <span class="Delimiter">{</span> -<a name="L85"></a><span id="L85" class="LineNr"> 85 </span> raise << maybe<span class="Delimiter">(</span>callee<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << return_inst<span class="Delimiter">.</span>name << <span class="Constant">" ingredient '"</span> << lhs<span class="Delimiter">.</span>original_string << <span class="Constant">"' can't be saved in '"</span> << rhs<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> -<a name="L86"></a><span id="L86" class="LineNr"> 86 </span> raise << <span class="Constant">" ['"</span> << to_string<span class="Delimiter">(</span>lhs<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="Constant">"' vs '"</span> << to_string<span class="Delimiter">(</span>rhs<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="Constant">"']</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> -<a name="L87"></a><span id="L87" class="LineNr"> 87 </span> <span class="Identifier">goto</span> finish_return_check<span class="Delimiter">;</span> -<a name="L88"></a><span id="L88" class="LineNr"> 88 </span> <span class="Delimiter">}</span> -<a name="L89"></a><span id="L89" class="LineNr"> 89 </span> <span class="Delimiter">}</span> -<a name="L90"></a><span id="L90" class="LineNr"> 90 </span> <span class="Comment">// check that any return ingredients with /same-as-ingredient connect up</span> -<a name="L91"></a><span id="L91" class="LineNr"> 91 </span> <span class="Comment">// the corresponding ingredient and product in the caller.</span> -<a name="L92"></a><span id="L92" class="LineNr"> 92 </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 < SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L93"></a><span id="L93" class="LineNr"> 93 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_property<span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">"same-as-ingredient"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span> -<a name="L94"></a><span id="L94" class="LineNr"> 94 </span> string_tree* tmp = property<span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">"same-as-ingredient"</span><span class="Delimiter">);</span> -<a name="L95"></a><span id="L95" class="LineNr"> 95 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!tmp || !tmp<span class="Delimiter">-></span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L96"></a><span id="L96" class="LineNr"> 96 </span> raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'same-as-ingredient' metadata should take exactly one value in '"</span> << to_original_string<span class="Delimiter">(</span>return_inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> -<a name="L97"></a><span id="L97" class="LineNr"> 97 </span> <span class="Identifier">goto</span> finish_return_check<span class="Delimiter">;</span> -<a name="L98"></a><span id="L98" class="LineNr"> 98 </span> <span class="Delimiter">}</span> -<a name="L99"></a><span id="L99" class="LineNr"> 99 </span> <span class="Normal">int</span> ingredient_index = to_integer<span class="Delimiter">(</span>tmp<span class="Delimiter">-></span>value<span class="Delimiter">);</span> -<a name="L100"></a><span id="L100" class="LineNr">100 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index >= SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">))</span> <span class="Delimiter">{</span> -<a name="L101"></a><span id="L101" class="LineNr">101 </span> raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"too few ingredients in '"</span> << to_original_string<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> -<a name="L102"></a><span id="L102" class="LineNr">102 </span> <span class="Identifier">goto</span> finish_return_check<span class="Delimiter">;</span> -<a name="L103"></a><span id="L103" class="LineNr">103 </span> <span class="Delimiter">}</span> -<a name="L104"></a><span id="L104" class="LineNr">104 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!is_dummy<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> && !is_literal<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">))</span> && caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name != caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">).</span>name<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L105"></a><span id="L105" class="LineNr">105 </span> raise << maybe<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>caller_instruction<span class="Delimiter">)</span> << <span class="Constant">"' should write to '"</span> << caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">).</span>original_string << <span class="Constant">"' rather than '"</span> << caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> -<a name="L106"></a><span id="L106" class="LineNr">106 </span> <span class="Delimiter">}</span> -<a name="L107"></a><span id="L107" class="LineNr">107 </span> <span class="Delimiter">}</span> -<a name="L108"></a><span id="L108" class="LineNr">108 </span> <span class="Delimiter">}</span> -<a name="L109"></a><span id="L109" class="LineNr">109 </span> <span class="Normal">finish_return_check</span>:<span class="Delimiter">;</span> -<a name="L110"></a><span id="L110" class="LineNr">110 </span> <span class="Delimiter">}</span> -<a name="L111"></a><span id="L111" class="LineNr">111 </span> <span class="Delimiter">}</span> -<a name="L112"></a><span id="L112" class="LineNr">112 </span><span class="Delimiter">}</span> -<a name="L113"></a><span id="L113" class="LineNr">113 </span> -<a name="L114"></a><span id="L114" class="LineNr">114 </span><span class="Delimiter">:(scenario return_type_mismatch)</span> -<a name="L115"></a><span id="L115" class="LineNr">115 </span><span class="Special">% Hide_errors = true;</span> -<a name="L116"></a><span id="L116" class="LineNr">116 </span><span class="muRecipe">def</span> main [ -<a name="L117"></a><span id="L117" class="LineNr">117 </span> <span class="Constant">3</span>:num<span class="Special"> <- </span>f <span class="Constant">2</span> -<a name="L118"></a><span id="L118" class="LineNr">118 </span>] -<a name="L119"></a><span id="L119" class="LineNr">119 </span><span class="muRecipe">def</span> f [ -<a name="L120"></a><span id="L120" class="LineNr">120 </span> <span class="Constant">12</span>:num<span class="Special"> <- </span>next-ingredient -<a name="L121"></a><span id="L121" class="LineNr">121 </span> <span class="Constant">13</span>:num<span class="Special"> <- </span>copy <span class="Constant">35</span> -<a name="L122"></a><span id="L122" class="LineNr">122 </span> <span class="Constant">14</span>:point<span class="Special"> <- </span>copy <span class="Constant">12</span>:point/<span class="Special">raw</span> -<a name="L123"></a><span id="L123" class="LineNr">123 </span> <span class="Identifier">return</span> <span class="Constant">14</span>:point -<a name="L124"></a><span id="L124" class="LineNr">124 </span>] -<a name="L125"></a><span id="L125" class="LineNr">125 </span><span class="traceContains">+error: f: return ingredient '14:point' can't be saved in '3:num'</span> -<a name="L126"></a><span id="L126" class="LineNr">126 </span> -<a name="L127"></a><span id="L127" class="LineNr">127 </span><span class="Comment">//: In Mu we'd like to assume that any instruction doesn't modify its</span> -<a name="L128"></a><span id="L128" class="LineNr">128 </span><span class="Comment">//: ingredients unless they're also products. The /same-as-ingredient inside</span> -<a name="L129"></a><span id="L129" class="LineNr">129 </span><span class="Comment">//: the recipe's 'return' indicates that an ingredient is intended to be</span> -<a name="L130"></a><span id="L130" class="LineNr">130 </span><span class="Comment">//: modified in place, and will help catch accidental misuse of such</span> -<a name="L131"></a><span id="L131" class="LineNr">131 </span><span class="Comment">//: 'ingredient-products' (sometimes called in-out parameters in other</span> -<a name="L132"></a><span id="L132" class="LineNr">132 </span><span class="Comment">//: languages).</span> -<a name="L133"></a><span id="L133" class="LineNr">133 </span> -<a name="L134"></a><span id="L134" class="LineNr">134 </span><span class="Delimiter">:(scenario return_same_as_ingredient)</span> -<a name="L135"></a><span id="L135" class="LineNr">135 </span><span class="Special">% Hide_errors = true;</span> -<a name="L136"></a><span id="L136" class="LineNr">136 </span><span class="muRecipe">def</span> main [ -<a name="L137"></a><span id="L137" class="LineNr">137 </span> <span class="Constant">1</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> -<a name="L138"></a><span id="L138" class="LineNr">138 </span> <span class="Constant">2</span>:num<span class="Special"> <- </span>test1 <span class="Constant">1</span>:num <span class="Comment"># call with different ingredient and product</span> -<a name="L139"></a><span id="L139" class="LineNr">139 </span>] -<a name="L140"></a><span id="L140" class="LineNr">140 </span><span class="muRecipe">def</span> test1 [ -<a name="L141"></a><span id="L141" class="LineNr">141 </span> <span class="Constant">10</span>:num<span class="Special"> <- </span>next-ingredient -<a name="L142"></a><span id="L142" class="LineNr">142 </span> <span class="Identifier">return</span> <span class="Constant">10</span>:num/same-as-ingredient:<span class="Constant">0</span> -<a name="L143"></a><span id="L143" class="LineNr">143 </span>] -<a name="L144"></a><span id="L144" class="LineNr">144 </span><span class="traceContains">+error: main: '2:num <- test1 1:num' should write to '1:num' rather than '2:num'</span> -<a name="L145"></a><span id="L145" class="LineNr">145 </span> -<a name="L146"></a><span id="L146" class="LineNr">146 </span><span class="Delimiter">:(scenario return_same_as_ingredient_dummy)</span> -<a name="L147"></a><span id="L147" class="LineNr">147 </span><span class="muRecipe">def</span> main [ -<a name="L148"></a><span id="L148" class="LineNr">148 </span> <span class="Constant">1</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> -<a name="L149"></a><span id="L149" class="LineNr">149 </span> _<span class="Special"> <- </span>test1 <span class="Constant">1</span>:num <span class="Comment"># call with different ingredient and product</span> -<a name="L150"></a><span id="L150" class="LineNr">150 </span>] -<a name="L151"></a><span id="L151" class="LineNr">151 </span><span class="muRecipe">def</span> test1 [ -<a name="L152"></a><span id="L152" class="LineNr">152 </span> <span class="Constant">10</span>:num<span class="Special"> <- </span>next-ingredient -<a name="L153"></a><span id="L153" class="LineNr">153 </span> <span class="Identifier">return</span> <span class="Constant">10</span>:num/same-as-ingredient:<span class="Constant">0</span> -<a name="L154"></a><span id="L154" class="LineNr">154 </span>] -<a name="L155"></a><span id="L155" class="LineNr">155 </span>$error: <span class="Constant">0</span> -<a name="L156"></a><span id="L156" class="LineNr">156 </span> -<a name="L157"></a><span id="L157" class="LineNr">157 </span><span class="Delimiter">:(code)</span> -<a name="L158"></a><span id="L158" class="LineNr">158 </span>string to_string<span class="Delimiter">(</span><span class="Normal">const</span> vector<<span class="Normal">double</span>>& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L159"></a><span id="L159" class="LineNr">159 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">"[]"</span><span class="Delimiter">;</span> -<a name="L160"></a><span id="L160" class="LineNr">160 </span> ostringstream out<span class="Delimiter">;</span> -<a name="L161"></a><span id="L161" class="LineNr">161 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>in<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L162"></a><span id="L162" class="LineNr">162 </span> out << no_scientific<span class="Delimiter">(</span>in<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span> -<a name="L163"></a><span id="L163" class="LineNr">163 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> -<a name="L164"></a><span id="L164" class="LineNr">164 </span> <span class="Delimiter">}</span> -<a name="L165"></a><span id="L165" class="LineNr">165 </span> out << <span class="Constant">"["</span><span class="Delimiter">;</span> -<a name="L166"></a><span id="L166" class="LineNr">166 </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 < SIZE<span class="Delimiter">(</span>in<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<a name="L167"></a><span id="L167" class="LineNr">167 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>i > <span class="Constant">0</span><span class="Delimiter">)</span> out << <span class="Constant">", "</span><span class="Delimiter">;</span> -<a name="L168"></a><span id="L168" class="LineNr">168 </span> out << no_scientific<span class="Delimiter">(</span>in<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span> -<a name="L169"></a><span id="L169" class="LineNr">169 </span> <span class="Delimiter">}</span> -<a name="L170"></a><span id="L170" class="LineNr">170 </span> out << <span class="Constant">"]"</span><span class="Delimiter">;</span> -<a name="L171"></a><span id="L171" class="LineNr">171 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> -<a name="L172"></a><span id="L172" class="LineNr">172 </span><span class="Delimiter">}</span> +<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Calls can also generate products, using 'reply' or 'return'.</span> +<span id="L2" class="LineNr"> 2 </span> +<span id="L3" class="LineNr"> 3 </span><span class="Delimiter">:(scenario return)</span> +<span id="L4" class="LineNr"> 4 </span><span class="muRecipe">def</span> main [ +<span id="L5" class="LineNr"> 5 </span> <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">2</span>:num<span class="Special"> <- </span>f <span class="Constant">34</span> +<span id="L6" class="LineNr"> 6 </span>] +<span id="L7" class="LineNr"> 7 </span><span class="muRecipe">def</span> f [ +<span id="L8" class="LineNr"> 8 </span> <span class="Constant">12</span>:num<span class="Special"> <- </span>next-ingredient +<span id="L9" class="LineNr"> 9 </span> <span class="Constant">13</span>:num<span class="Special"> <- </span>add <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">12</span>:num +<span id="L10" class="LineNr"> 10 </span> <span class="Identifier">return</span> <span class="Constant">12</span>:num<span class="Delimiter">,</span> <span class="Constant">13</span>:num +<span id="L11" class="LineNr"> 11 </span>] +<span id="L12" class="LineNr"> 12 </span><span class="traceContains">+mem: storing 34 in location 1</span> +<span id="L13" class="LineNr"> 13 </span><span class="traceContains">+mem: storing 35 in location 2</span> +<span id="L14" class="LineNr"> 14 </span> +<span id="L15" class="LineNr"> 15 </span><span class="Delimiter">:(scenario reply)</span> +<span id="L16" class="LineNr"> 16 </span><span class="muRecipe">def</span> main [ +<span id="L17" class="LineNr"> 17 </span> <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">2</span>:num<span class="Special"> <- </span>f <span class="Constant">34</span> +<span id="L18" class="LineNr"> 18 </span>] +<span id="L19" class="LineNr"> 19 </span><span class="muRecipe">def</span> f [ +<span id="L20" class="LineNr"> 20 </span> <span class="Constant">12</span>:num<span class="Special"> <- </span>next-ingredient +<span id="L21" class="LineNr"> 21 </span> <span class="Constant">13</span>:num<span class="Special"> <- </span>add <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">12</span>:num +<span id="L22" class="LineNr"> 22 </span> reply <span class="Constant">12</span>:num<span class="Delimiter">,</span> <span class="Constant">13</span>:num +<span id="L23" class="LineNr"> 23 </span>] +<span id="L24" class="LineNr"> 24 </span><span class="traceContains">+mem: storing 34 in location 1</span> +<span id="L25" class="LineNr"> 25 </span><span class="traceContains">+mem: storing 35 in location 2</span> +<span id="L26" class="LineNr"> 26 </span> +<span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +<span id="L28" class="LineNr"> 28 </span>RETURN<span class="Delimiter">,</span> +<span id="L29" class="LineNr"> 29 </span><span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +<span id="L30" class="LineNr"> 30 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"return"</span><span class="Delimiter">,</span> RETURN<span class="Delimiter">);</span> +<span id="L31" class="LineNr"> 31 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"reply"</span><span class="Delimiter">,</span> RETURN<span class="Delimiter">);</span> <span class="Comment">// synonym while teaching</span> +<span id="L32" class="LineNr"> 32 </span><span class="Delimiter">:(before "End Primitive Recipe Checks")</span> +<span id="L33" class="LineNr"> 33 </span><span class="Normal">case</span> RETURN: <span class="Delimiter">{</span> +<span id="L34" class="LineNr"> 34 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// checks will be performed by a transform below</span> +<span id="L35" class="LineNr"> 35 </span><span class="Delimiter">}</span> +<span id="L36" class="LineNr"> 36 </span><span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> +<span id="L37" class="LineNr"> 37 </span><span class="Normal">case</span> RETURN: <span class="Delimiter">{</span> +<span id="L38" class="LineNr"> 38 </span> <span class="Comment">// Starting Reply</span> +<span id="L39" class="LineNr"> 39 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_stream<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L40" class="LineNr"> 40 </span> trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"trace"</span><span class="Delimiter">)</span> << current_instruction<span class="Delimiter">().</span>name << <span class="Constant">": decrementing callstack depth from "</span> << Trace_stream<span class="Delimiter">-></span>callstack_depth << end<span class="Delimiter">();</span> +<span id="L41" class="LineNr"> 41 </span> --Trace_stream<span class="Delimiter">-></span>callstack_depth<span class="Delimiter">;</span> +<span id="L42" class="LineNr"> 42 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-></span>callstack_depth < <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L43" class="LineNr"> 43 </span> Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>clear<span class="Delimiter">();</span> +<span id="L44" class="LineNr"> 44 </span> <span class="Identifier">goto</span> stop_running_current_routine<span class="Delimiter">;</span> +<span id="L45" class="LineNr"> 45 </span> <span class="Delimiter">}</span> +<span id="L46" class="LineNr"> 46 </span> <span class="Delimiter">}</span> +<span id="L47" class="LineNr"> 47 </span> Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>pop_front<span class="Delimiter">();</span> +<span id="L48" class="LineNr"> 48 </span> <span class="Comment">// just in case 'main' returns a value, drop it for now</span> +<span id="L49" class="LineNr"> 49 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">goto</span> stop_running_current_routine<span class="Delimiter">;</span> +<span id="L50" class="LineNr"> 50 </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 < SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> +<span id="L51" class="LineNr"> 51 </span> trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"result "</span> << i << <span class="Constant">" is "</span> << to_string<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> << end<span class="Delimiter">();</span> +<span id="L52" class="LineNr"> 52 </span> <span class="Comment">// make return products available to caller</span> +<span id="L53" class="LineNr"> 53 </span> copy<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> ingredients<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> inserter<span class="Delimiter">(</span>products<span class="Delimiter">,</span> products<span class="Delimiter">.</span>begin<span class="Delimiter">()));</span> +<span id="L54" class="LineNr"> 54 </span> <span class="Comment">// End Reply</span> +<span id="L55" class="LineNr"> 55 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// continue to process rest of *caller* instruction</span> +<span id="L56" class="LineNr"> 56 </span><span class="Delimiter">}</span> +<span id="L57" class="LineNr"> 57 </span> +<span id="L58" class="LineNr"> 58 </span><span class="Comment">//: Types in return instructions are checked ahead of time.</span> +<span id="L59" class="LineNr"> 59 </span> +<span id="L60" class="LineNr"> 60 </span><span class="Delimiter">:(before "End Checks")</span> +<span id="L61" class="LineNr"> 61 </span>Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_types_of_return_instructions<span class="Delimiter">);</span> <span class="Comment">// idempotent</span> +<span id="L62" class="LineNr"> 62 </span><span class="Delimiter">:(code)</span> +<span id="L63" class="LineNr"> 63 </span><span class="Normal">void</span> check_types_of_return_instructions<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L64" class="LineNr"> 64 </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="L65" class="LineNr"> 65 </span> trace<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 types of return instructions in recipe "</span> << caller<span class="Delimiter">.</span>name << end<span class="Delimiter">();</span> +<span id="L66" class="LineNr"> 66 </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 < SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L67" class="LineNr"> 67 </span> <span class="Normal">const</span> instruction& caller_instruction = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> +<span id="L68" class="LineNr"> 68 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>is_label<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> +<span id="L69" class="LineNr"> 69 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> +<span id="L70" class="LineNr"> 70 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>operation < MAX_PRIMITIVE_RECIPES<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> +<span id="L71" class="LineNr"> 71 </span> <span class="Normal">const</span> recipe& callee = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> caller_instruction<span class="Delimiter">.</span>operation<span class="Delimiter">);</span> +<span id="L72" class="LineNr"> 72 </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 < SIZE<span class="Delimiter">(</span>callee<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L73" class="LineNr"> 73 </span> <span class="Normal">const</span> instruction& return_inst = callee<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> +<span id="L74" class="LineNr"> 74 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>operation != RETURN<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> +<span id="L75" class="LineNr"> 75 </span> <span class="Comment">// check types with the caller</span> +<span id="L76" class="LineNr"> 76 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">)</span> > SIZE<span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">))</span> <span class="Delimiter">{</span> +<span id="L77" class="LineNr"> 77 </span> raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"too few values returned from "</span> << callee<span class="Delimiter">.</span>name << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> +<span id="L78" class="LineNr"> 78 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L79" class="LineNr"> 79 </span> <span class="Delimiter">}</span> +<span id="L80" class="LineNr"> 80 </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 < SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L81" class="LineNr"> 81 </span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> lhs = return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> +<span id="L82" class="LineNr"> 82 </span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> rhs = caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span> +<span id="L83" class="LineNr"> 83 </span> <span class="Comment">// End Check RETURN Copy(lhs, rhs)</span> +<span id="L84" class="LineNr"> 84 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>rhs<span class="Delimiter">,</span> lhs<span class="Delimiter">))</span> <span class="Delimiter">{</span> +<span id="L85" class="LineNr"> 85 </span> raise << maybe<span class="Delimiter">(</span>callee<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << return_inst<span class="Delimiter">.</span>name << <span class="Constant">" ingredient '"</span> << lhs<span class="Delimiter">.</span>original_string << <span class="Constant">"' can't be saved in '"</span> << rhs<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> +<span id="L86" class="LineNr"> 86 </span> raise << <span class="Constant">" ['"</span> << to_string<span class="Delimiter">(</span>lhs<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="Constant">"' vs '"</span> << to_string<span class="Delimiter">(</span>rhs<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="Constant">"']</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> +<span id="L87" class="LineNr"> 87 </span> <span class="Identifier">goto</span> finish_return_check<span class="Delimiter">;</span> +<span id="L88" class="LineNr"> 88 </span> <span class="Delimiter">}</span> +<span id="L89" class="LineNr"> 89 </span> <span class="Delimiter">}</span> +<span id="L90" class="LineNr"> 90 </span> <span class="Comment">// check that any return ingredients with /same-as-ingredient connect up</span> +<span id="L91" class="LineNr"> 91 </span> <span class="Comment">// the corresponding ingredient and product in the caller.</span> +<span id="L92" class="LineNr"> 92 </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 < SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L93" class="LineNr"> 93 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>has_property<span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">"same-as-ingredient"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span> +<span id="L94" class="LineNr"> 94 </span> string_tree* tmp = property<span class="Delimiter">(</span>return_inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">"same-as-ingredient"</span><span class="Delimiter">);</span> +<span id="L95" class="LineNr"> 95 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!tmp || !tmp<span class="Delimiter">-></span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L96" class="LineNr"> 96 </span> raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'same-as-ingredient' metadata should take exactly one value in '"</span> << to_original_string<span class="Delimiter">(</span>return_inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> +<span id="L97" class="LineNr"> 97 </span> <span class="Identifier">goto</span> finish_return_check<span class="Delimiter">;</span> +<span id="L98" class="LineNr"> 98 </span> <span class="Delimiter">}</span> +<span id="L99" class="LineNr"> 99 </span> <span class="Normal">int</span> ingredient_index = to_integer<span class="Delimiter">(</span>tmp<span class="Delimiter">-></span>value<span class="Delimiter">);</span> +<span id="L100" class="LineNr">100 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index >= SIZE<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">))</span> <span class="Delimiter">{</span> +<span id="L101" class="LineNr">101 </span> raise << maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"too few ingredients in '"</span> << to_original_string<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> +<span id="L102" class="LineNr">102 </span> <span class="Identifier">goto</span> finish_return_check<span class="Delimiter">;</span> +<span id="L103" class="LineNr">103 </span> <span class="Delimiter">}</span> +<span id="L104" class="LineNr">104 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>!is_dummy<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> && !is_literal<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">))</span> && caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name != caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">).</span>name<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L105" class="LineNr">105 </span> raise << maybe<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>caller_instruction<span class="Delimiter">)</span> << <span class="Constant">"' should write to '"</span> << caller_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">).</span>original_string << <span class="Constant">"' rather than '"</span> << caller_instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> +<span id="L106" class="LineNr">106 </span> <span class="Delimiter">}</span> +<span id="L107" class="LineNr">107 </span> <span class="Delimiter">}</span> +<span id="L108" class="LineNr">108 </span> <span class="Delimiter">}</span> +<span id="L109" class="LineNr">109 </span> <span class="Normal">finish_return_check</span>:<span class="Delimiter">;</span> +<span id="L110" class="LineNr">110 </span> <span class="Delimiter">}</span> +<span id="L111" class="LineNr">111 </span> <span class="Delimiter">}</span> +<span id="L112" class="LineNr">112 </span><span class="Delimiter">}</span> +<span id="L113" class="LineNr">113 </span> +<span id="L114" class="LineNr">114 </span><span class="Delimiter">:(scenario return_type_mismatch)</span> +<span id="L115" class="LineNr">115 </span><span class="Special">% Hide_errors = true;</span> +<span id="L116" class="LineNr">116 </span><span class="muRecipe">def</span> main [ +<span id="L117" class="LineNr">117 </span> <span class="Constant">3</span>:num<span class="Special"> <- </span>f <span class="Constant">2</span> +<span id="L118" class="LineNr">118 </span>] +<span id="L119" class="LineNr">119 </span><span class="muRecipe">def</span> f [ +<span id="L120" class="LineNr">120 </span> <span class="Constant">12</span>:num<span class="Special"> <- </span>next-ingredient +<span id="L121" class="LineNr">121 </span> <span class="Constant">13</span>:num<span class="Special"> <- </span>copy <span class="Constant">35</span> +<span id="L122" class="LineNr">122 </span> <span class="Constant">14</span>:point<span class="Special"> <- </span>copy <span class="Constant">12</span>:point/<span class="Special">raw</span> +<span id="L123" class="LineNr">123 </span> <span class="Identifier">return</span> <span class="Constant">14</span>:point +<span id="L124" class="LineNr">124 </span>] +<span id="L125" class="LineNr">125 </span><span class="traceContains">+error: f: return ingredient '14:point' can't be saved in '3:num'</span> +<span id="L126" class="LineNr">126 </span> +<span id="L127" class="LineNr">127 </span><span class="Comment">//: In Mu we'd like to assume that any instruction doesn't modify its</span> +<span id="L128" class="LineNr">128 </span><span class="Comment">//: ingredients unless they're also products. The /same-as-ingredient inside</span> +<span id="L129" class="LineNr">129 </span><span class="Comment">//: the recipe's 'return' indicates that an ingredient is intended to be</span> +<span id="L130" class="LineNr">130 </span><span class="Comment">//: modified in place, and will help catch accidental misuse of such</span> +<span id="L131" class="LineNr">131 </span><span class="Comment">//: 'ingredient-products' (sometimes called in-out parameters in other</span> +<span id="L132" class="LineNr">132 </span><span class="Comment">//: languages).</span> +<span id="L133" class="LineNr">133 </span> +<span id="L134" class="LineNr">134 </span><span class="Delimiter">:(scenario return_same_as_ingredient)</span> +<span id="L135" class="LineNr">135 </span><span class="Special">% Hide_errors = true;</span> +<span id="L136" class="LineNr">136 </span><span class="muRecipe">def</span> main [ +<span id="L137" class="LineNr">137 </span> <span class="Constant">1</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> +<span id="L138" class="LineNr">138 </span> <span class="Constant">2</span>:num<span class="Special"> <- </span>test1 <span class="Constant">1</span>:num <span class="Comment"># call with different ingredient and product</span> +<span id="L139" class="LineNr">139 </span>] +<span id="L140" class="LineNr">140 </span><span class="muRecipe">def</span> test1 [ +<span id="L141" class="LineNr">141 </span> <span class="Constant">10</span>:num<span class="Special"> <- </span>next-ingredient +<span id="L142" class="LineNr">142 </span> <span class="Identifier">return</span> <span class="Constant">10</span>:num/same-as-ingredient:<span class="Constant">0</span> +<span id="L143" class="LineNr">143 </span>] +<span id="L144" class="LineNr">144 </span><span class="traceContains">+error: main: '2:num <- test1 1:num' should write to '1:num' rather than '2:num'</span> +<span id="L145" class="LineNr">145 </span> +<span id="L146" class="LineNr">146 </span><span class="Delimiter">:(scenario return_same_as_ingredient_dummy)</span> +<span id="L147" class="LineNr">147 </span><span class="muRecipe">def</span> main [ +<span id="L148" class="LineNr">148 </span> <span class="Constant">1</span>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> +<span id="L149" class="LineNr">149 </span> _<span class="Special"> <- </span>test1 <span class="Constant">1</span>:num <span class="Comment"># call with different ingredient and product</span> +<span id="L150" class="LineNr">150 </span>] +<span id="L151" class="LineNr">151 </span><span class="muRecipe">def</span> test1 [ +<span id="L152" class="LineNr">152 </span> <span class="Constant">10</span>:num<span class="Special"> <- </span>next-ingredient +<span id="L153" class="LineNr">153 </span> <span class="Identifier">return</span> <span class="Constant">10</span>:num/same-as-ingredient:<span class="Constant">0</span> +<span id="L154" class="LineNr">154 </span>] +<span id="L155" class="LineNr">155 </span>$error: <span class="Constant">0</span> +<span id="L156" class="LineNr">156 </span> +<span id="L157" class="LineNr">157 </span><span class="Delimiter">:(code)</span> +<span id="L158" class="LineNr">158 </span>string to_string<span class="Delimiter">(</span><span class="Normal">const</span> vector<<span class="Normal">double</span>>& in<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L159" class="LineNr">159 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">"[]"</span><span class="Delimiter">;</span> +<span id="L160" class="LineNr">160 </span> ostringstream out<span class="Delimiter">;</span> +<span id="L161" class="LineNr">161 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>in<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L162" class="LineNr">162 </span> out << no_scientific<span class="Delimiter">(</span>in<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span> +<span id="L163" class="LineNr">163 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> +<span id="L164" class="LineNr">164 </span> <span class="Delimiter">}</span> +<span id="L165" class="LineNr">165 </span> out << <span class="Constant">"["</span><span class="Delimiter">;</span> +<span id="L166" class="LineNr">166 </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 < SIZE<span class="Delimiter">(</span>in<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L167" class="LineNr">167 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>i > <span class="Constant">0</span><span class="Delimiter">)</span> out << <span class="Constant">", "</span><span class="Delimiter">;</span> +<span id="L168" class="LineNr">168 </span> out << no_scientific<span class="Delimiter">(</span>in<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span> +<span id="L169" class="LineNr">169 </span> <span class="Delimiter">}</span> +<span id="L170" class="LineNr">170 </span> out << <span class="Constant">"]"</span><span class="Delimiter">;</span> +<span id="L171" class="LineNr">171 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span> +<span id="L172" class="LineNr">172 </span><span class="Delimiter">}</span> </pre> </body> </html> |