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<span class="Comment">//: A program is a book of 'recipes' (functions)</span>
<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span class="Comment">//: Each recipe is stored at a specific page number, or ordinal.</span>
map&lt;recipe_ordinal<span class="Delimiter">,</span> recipe&gt; Recipe<span class="Delimiter">;</span>
<span class="Comment">//: You can also refer to each recipe by its name.</span>
map&lt;string<span class="Delimiter">,</span> recipe_ordinal&gt; Recipe_ordinal<span class="Delimiter">;</span>
recipe_ordinal Next_recipe_ordinal = <span class="Constant">1</span><span class="Delimiter">;</span>

<span class="Comment">//: Ordinals are like numbers, except you can't do arithmetic on them. Ordinal</span>
<span class="Comment">//: 1 is not less than 2, it's just different. Phone numbers are ordinals;</span>
<span class="Comment">//: adding two phone numbers is meaningless. Here each recipe does something</span>
<span class="Comment">//: incommensurable with any other recipe.</span>
<span class="Delimiter">:(after &quot;Types&quot;)</span>
typedef long long int recipe_ordinal<span class="Delimiter">;</span>

<span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span class="Comment">// Recipes are lists of instructions. To perform or 'run' a recipe, the</span>
<span class="Comment">// computer runs its instructions.</span>
struct recipe <span class="Delimiter">{</span>
  string name<span class="Delimiter">;</span>
  vector&lt;instruction&gt; steps<span class="Delimiter">;</span>
  <span class="Comment">// End recipe Fields</span>
<span class="Delimiter">};</span>

<span class="Delimiter">:(before &quot;struct recipe&quot;)</span>
<span class="Comment">// Each instruction is either of the form:</span>
<span class="Comment">//   product1, product2, product3, ... &lt;- operation ingredient1, ingredient2, ingredient3, ...</span>
<span class="Comment">// or just a single 'label' starting with a non-alphanumeric character</span>
<span class="Comment">//   +label</span>
<span class="Comment">// Labels don't do anything, they're just waypoints.</span>
struct instruction <span class="Delimiter">{</span>
  bool is_label<span class="Delimiter">;</span>
  string label<span class="Delimiter">;</span>  <span class="Comment">// only if is_label</span>
  string name<span class="Delimiter">;</span>  <span class="Comment">// only if !is_label</span>
  recipe_ordinal operation<span class="Delimiter">;</span>  <span class="Comment">// Recipe_ordinal[name]</span>
  vector&lt;reagent&gt; ingredients<span class="Delimiter">;</span>  <span class="Comment">// only if !is_label</span>
  vector&lt;reagent&gt; products<span class="Delimiter">;</span>  <span class="Comment">// only if !is_label</span>
  instruction<span class="Delimiter">();</span>
  void clear<span class="Delimiter">();</span>
  string to_string<span class="Delimiter">()</span> const<span class="Delimiter">;</span>
<span class="Delimiter">};</span>

<span class="Delimiter">:(before &quot;struct instruction&quot;)</span>
<span class="Comment">// Ingredients and products are a single species -- a reagent. Reagents refer</span>
<span class="Comment">// either to numbers or to locations in memory along with 'type' tags telling</span>
<span class="Comment">// us how to interpret them. They also can contain arbitrary other lists of</span>
<span class="Comment">// properties besides types, but we're getting ahead of ourselves.</span>
struct reagent <span class="Delimiter">{</span>
  string original_string<span class="Delimiter">;</span>
  vector&lt;pair&lt;string<span class="Delimiter">,</span> vector&lt;string&gt; &gt; &gt; properties<span class="Delimiter">;</span>
  string name<span class="Delimiter">;</span>
  double value<span class="Delimiter">;</span>
  bool initialized<span class="Delimiter">;</span>
  vector&lt;type_ordinal&gt; types<span class="Delimiter">;</span>
  reagent<span class="Delimiter">(</span>string s<span class="Delimiter">);</span>
  reagent<span class="Delimiter">();</span>
  void set_value<span class="Delimiter">(</span>double v<span class="Delimiter">)</span> <span class="Delimiter">{</span> value = v<span class="Delimiter">;</span> initialized = <span class="Constant">true</span><span class="Delimiter">;</span> <span class="Delimiter">}</span>
  string to_string<span class="Delimiter">()</span> const<span class="Delimiter">;</span>
<span class="Delimiter">};</span>

<span class="Delimiter">:(before &quot;struct reagent&quot;)</span>
struct property <span class="Delimiter">{</span>
  vector&lt;string&gt; values<span class="Delimiter">;</span>
<span class="Delimiter">};</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span class="Comment">// Locations refer to a common 'memory'. Each location can store a number.</span>
map&lt;long long int<span class="Delimiter">,</span> double&gt; Memory<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>
Memory<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>

<span class="Delimiter">:(after &quot;Types&quot;)</span>
<span class="Comment">// Mu types encode how the numbers stored in different parts of memory are</span>
<span class="Comment">// interpreted. A location tagged as a 'character' type will interpret the</span>
<span class="Comment">// number 97 as the letter 'a', while a different location of type 'number'</span>
<span class="Comment">// would not.</span>
<span class="Comment">//</span>
<span class="Comment">// Unlike most computers today, mu stores types in a single big table, shared</span>
<span class="Comment">// by all the mu programs on the computer. This is useful in providing a</span>
<span class="Comment">// seamless experience to help understand arbitrary mu programs.</span>
typedef long long int type_ordinal<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
map&lt;string<span class="Delimiter">,</span> type_ordinal&gt; Type_ordinal<span class="Delimiter">;</span>
map&lt;type_ordinal<span class="Delimiter">,</span> type_info&gt; Type<span class="Delimiter">;</span>
type_ordinal Next_type_ordinal = <span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">:(code)</span>
void setup_types<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  Type<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>  Type_ordinal<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
  Type_ordinal[<span class="Constant">&quot;literal&quot;</span>] = <span class="Constant">0</span><span class="Delimiter">;</span>
  Next_type_ordinal = <span class="Constant">1</span><span class="Delimiter">;</span>
  <span class="Comment">// Mu Types Initialization</span>
  type_ordinal number = Type_ordinal[<span class="Constant">&quot;number&quot;</span>] = Next_type_ordinal++<span class="Delimiter">;</span>
  Type_ordinal[<span class="Constant">&quot;location&quot;</span>] = Type_ordinal[<span class="Constant">&quot;number&quot;</span>]<span class="Delimiter">;</span>  <span class="Comment">// wildcard type: either a pointer or a scalar</span>
  Type[number]<span class="Delimiter">.</span>name = <span class="Constant">&quot;number&quot;</span><span class="Delimiter">;</span>
  type_ordinal address = Type_ordinal[<span class="Constant">&quot;address&quot;</span>] = Next_type_ordinal++<span class="Delimiter">;</span>
  Type[address]<span class="Delimiter">.</span>name = <span class="Constant">&quot;address&quot;</span><span class="Delimiter">;</span>
  type_ordinal boolean = Type_ordinal[<span class="Constant">&quot;boolean&quot;</span>] = Next_type_ordinal++<span class="Delimiter">;</span>
  Type[boolean]<span class="Delimiter">.</span>name = <span class="Constant">&quot;boolean&quot;</span><span class="Delimiter">;</span>
  type_ordinal character = Type_ordinal[<span class="Constant">&quot;character&quot;</span>] = Next_type_ordinal++<span class="Delimiter">;</span>
  Type[character]<span class="Delimiter">.</span>name = <span class="Constant">&quot;character&quot;</span><span class="Delimiter">;</span>
  <span class="Comment">// Array types are a special modifier to any other type. For example,</span>
  <span class="Comment">// array:number or array:address:boolean.</span>
  type_ordinal array = Type_ordinal[<span class="Constant">&quot;array&quot;</span>] = Next_type_ordinal++<span class="Delimiter">;</span>
  Type[array]<span class="Delimiter">.</span>name = <span class="Constant">&quot;array&quot;</span><span class="Delimiter">;</span>
  <span class="Comment">// End Mu Types Initialization</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
setup_types<span class="Delimiter">();</span>

<span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span class="Comment">// You can construct arbitrary new types. New types are either 'containers'</span>
<span class="Comment">// with multiple 'elements' of other types, or 'exclusive containers' containing</span>
<span class="Comment">// one of multiple 'variants'. (These are similar to C structs and unions,</span>
<span class="Comment">// respectively, though exclusive containers implicitly include a tag element</span>
<span class="Comment">// recording which variant they should be interpreted as.)</span>
<span class="Comment">//</span>
<span class="Comment">// For example, storing bank balance and name for an account might require a</span>
<span class="Comment">// container, but if bank accounts may be either for individuals or groups,</span>
<span class="Comment">// with different properties for each, that may require an exclusive container</span>
<span class="Comment">// whose variants are individual-account and joint-account containers.</span>
enum kind_of_type <span class="Delimiter">{</span>
  primitive<span class="Delimiter">,</span>
  container<span class="Delimiter">,</span>
  exclusive_container
<span class="Delimiter">};</span>

struct type_info <span class="Delimiter">{</span>
  string name<span class="Delimiter">;</span>
  kind_of_type kind<span class="Delimiter">;</span>
  long long int size<span class="Delimiter">;</span>  <span class="Comment">// only if type is not primitive; primitives and addresses have size 1 (except arrays are dynamic)</span>
  vector&lt;vector&lt;type_ordinal&gt; &gt; elements<span class="Delimiter">;</span>
  vector&lt;string&gt; element_names<span class="Delimiter">;</span>
  <span class="Comment">// End type_info Fields</span>
  type_info<span class="Delimiter">()</span> :kind<span class="Delimiter">(</span>primitive<span class="Delimiter">),</span> size<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{}</span>
<span class="Delimiter">};</span>

enum primitive_recipes <span class="Delimiter">{</span>
  IDLE = <span class="Constant">0</span><span class="Delimiter">,</span>
  COPY<span class="Delimiter">,</span>
  <span class="Comment">// End Primitive Recipe Declarations</span>
  MAX_PRIMITIVE_RECIPES<span class="Delimiter">,</span>
<span class="Delimiter">};</span>
<span class="Delimiter">:(code)</span>
<span class="Comment">//: It's all very well to construct recipes out of other recipes, but we need</span>
<span class="Comment">//: to know how to do *something* out of the box. For the following</span>
<span class="Comment">//: recipes there are only codes, no entries in the book, because mu just knows</span>
<span class="Comment">//: what to do for them.</span>
void setup_recipes<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  Recipe<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>  Recipe_ordinal<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
  Recipe_ordinal[<span class="Constant">&quot;idle&quot;</span>] = IDLE<span class="Delimiter">;</span>
  <span class="Comment">// Primitive Recipe Numbers</span>
  Recipe_ordinal[<span class="Constant">&quot;copy&quot;</span>] = COPY<span class="Delimiter">;</span>
  <span class="Comment">// End Primitive Recipe Numbers</span>
<span class="Delimiter">}</span>
<span class="Comment">//: We could just reset the recipe table after every test, but that gets slow</span>
<span class="Comment">//: all too quickly. Instead, initialize the common stuff just once at</span>
<span class="Comment">//: startup. Later layers will carefully undo each test's additions after</span>
<span class="Comment">//: itself.</span>
<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
setup_recipes<span class="Delimiter">();</span>
assert<span class="Delimiter">(</span>MAX_PRIMITIVE_RECIPES &lt; <span class="Constant">100</span><span class="Delimiter">);</span>  <span class="Comment">// level 0 is primitives; until 99</span>
Next_recipe_ordinal = <span class="Constant">100</span><span class="Delimiter">;</span>
<span class="Comment">// End Load Recipes</span>
<span class="Delimiter">:(before &quot;End Test Run Initialization&quot;)</span>
assert<span class="Delimiter">(</span>Next_recipe_ordinal &lt; <span class="Constant">1000</span><span class="Delimiter">);</span>  <span class="Comment">// recipes being tested didn't overflow into test space</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>
Next_recipe_ordinal = <span class="Constant">1000</span><span class="Delimiter">;</span>  <span class="Comment">// consistent new numbers for each test</span>

^L

<span class="SalientComment">//:: Helpers</span>

<span class="Delimiter">:(code)</span>
instruction::instruction<span class="Delimiter">()</span> :is_label<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">),</span> operation<span class="Delimiter">(</span>IDLE<span class="Delimiter">)</span> <span class="Delimiter">{}</span>
void instruction::clear<span class="Delimiter">()</span> <span class="Delimiter">{</span> is_label=<span class="Constant">false</span><span class="Delimiter">;</span> label<span class="Delimiter">.</span>clear<span class="Delimiter">();</span> operation=IDLE<span class="Delimiter">;</span> ingredients<span class="Delimiter">.</span>clear<span class="Delimiter">();</span> products<span class="Delimiter">.</span>clear<span class="Delimiter">();</span> <span class="Delimiter">}</span>

<span class="Comment">// Reagents have the form &lt;name&gt;:&lt;type&gt;:&lt;type&gt;:.../&lt;property&gt;/&lt;property&gt;/...</span>
reagent::reagent<span class="Delimiter">(</span>string s<span class="Delimiter">)</span> :original_string<span class="Delimiter">(</span>s<span class="Delimiter">),</span> value<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">),</span> initialized<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
  istringstream in<span class="Delimiter">(</span>s<span class="Delimiter">);</span>
  in &gt;&gt; std::noskipws<span class="Delimiter">;</span>
  <span class="Comment">// properties</span>
  while <span class="Delimiter">(</span>!in<span class="Delimiter">.</span>eof<span class="Delimiter">())</span> <span class="Delimiter">{</span>
    istringstream row<span class="Delimiter">(</span>slurp_until<span class="Delimiter">(</span>in<span class="Delimiter">,</span> <span class="Constant">'/'</span><span class="Delimiter">));</span>
    row &gt;&gt; std::noskipws<span class="Delimiter">;</span>
    string name = slurp_until<span class="Delimiter">(</span>row<span class="Delimiter">,</span> <span class="Constant">':'</span><span class="Delimiter">);</span>
    vector&lt;string&gt; values<span class="Delimiter">;</span>
    while <span class="Delimiter">(</span>!row<span class="Delimiter">.</span>eof<span class="Delimiter">())</span>
      values<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>slurp_until<span class="Delimiter">(</span>row<span class="Delimiter">,</span> <span class="Constant">':'</span><span class="Delimiter">));</span>
    properties<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair&lt;string<span class="Delimiter">,</span> vector&lt;string&gt; &gt;<span class="Delimiter">(</span>name<span class="Delimiter">,</span> values<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// structures for the first row of properties</span>
  name = properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>first<span class="Delimiter">;</span>
  for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    string type = properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
    if <span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">.</span>find<span class="Delimiter">(</span>type<span class="Delimiter">)</span> == Type_ordinal<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//?       cerr &lt;&lt; type &lt;&lt; &quot; is &quot; &lt;&lt; Next_type_ordinal &lt;&lt; '\n'; //? 1</span>
      Type_ordinal[type] = Next_type_ordinal++<span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
    types<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>Type_ordinal[type]<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>name<span class="Delimiter">)</span> &amp;&amp; types<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
    types<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
    properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><span class="Constant">&quot;literal&quot;</span><span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>name == <span class="Constant">&quot;_&quot;</span> &amp;&amp; types<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
    types<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
    properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><span class="Constant">&quot;dummy&quot;</span><span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

reagent::reagent<span class="Delimiter">()</span> :value<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">),</span> initialized<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// The first property is special, so ensure we always have it.</span>
  <span class="Comment">// Other properties can be pushed back, but the first must always be</span>
  <span class="Comment">// assigned to.</span>
  properties<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair&lt;string<span class="Delimiter">,</span> vector&lt;string&gt; &gt;<span class="Delimiter">(</span><span class="Constant">&quot;&quot;</span><span class="Delimiter">,</span> vector&lt;string&gt;<span class="Delimiter">()));</span>
<span class="Delimiter">}</span>

string reagent::to_string<span class="Delimiter">()</span> const <span class="Delimiter">{</span>
  ostringstream out<span class="Delimiter">;</span>
  out &lt;&lt; <span class="Constant">&quot;{name: </span><span class="cSpecial">\&quot;</span><span class="Constant">&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\&quot;</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>!properties<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
    out &lt;&lt; <span class="Constant">&quot;, properties: [&quot;</span><span class="Delimiter">;</span>
    for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>properties<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      out &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\&quot;</span><span class="Constant">&quot;</span> &lt;&lt; properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\&quot;</span><span class="Constant">: &quot;</span><span class="Delimiter">;</span>
      for <span class="Delimiter">(</span>long long int j = <span class="Constant">0</span><span class="Delimiter">;</span> j &lt; SIZE<span class="Delimiter">(</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
        if <span class="Delimiter">(</span>j &gt; <span class="Constant">0</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Constant">':'</span><span class="Delimiter">;</span>
        out &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\&quot;</span><span class="Constant">&quot;</span> &lt;&lt; properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\&quot;</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
      if <span class="Delimiter">(</span>i &lt; SIZE<span class="Delimiter">(</span>properties<span class="Delimiter">)</span>-<span class="Constant">1</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Constant">&quot;, &quot;</span><span class="Delimiter">;</span>
      else out &lt;&lt; <span class="Constant">&quot;]&quot;</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  out &lt;&lt; <span class="Constant">&quot;}&quot;</span><span class="Delimiter">;</span>
<span class="CommentedCode">//?   if (properties.at(0).second.empty()) cerr &lt;&lt; out.str(); //? 1</span>
  <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

string instruction::to_string<span class="Delimiter">()</span> const <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>is_label<span class="Delimiter">)</span> <span class="Identifier">return</span> label<span class="Delimiter">;</span>
  ostringstream out<span class="Delimiter">;</span>
  for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>i &gt; <span class="Constant">0</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Constant">&quot;, &quot;</span><span class="Delimiter">;</span>
    out &lt;&lt; products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>original_string<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>!products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> out &lt;&lt; <span class="Constant">&quot; &lt;- &quot;</span><span class="Delimiter">;</span>
  out &lt;&lt; name &lt;&lt; <span class="Constant">' '</span><span class="Delimiter">;</span>
  for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>i &gt; <span class="Constant">0</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Constant">&quot;, &quot;</span><span class="Delimiter">;</span>
    out &lt;&lt; ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>original_string<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

string slurp_until<span class="Delimiter">(</span>istream&amp; in<span class="Delimiter">,</span> char delim<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  ostringstream out<span class="Delimiter">;</span>
  char c<span class="Delimiter">;</span>
  while <span class="Delimiter">(</span>in &gt;&gt; c<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>c == delim<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      <span class="Comment">// drop the delim</span>
      <span class="Identifier">break</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
    out &lt;&lt; c<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

void dump_memory<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  for <span class="Delimiter">(</span>map&lt;long long int<span class="Delimiter">,</span> double&gt;::iterator p = Memory<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Memory<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    cout &lt;&lt; p<span class="Delimiter">-&gt;</span>first &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; p<span class="Delimiter">-&gt;</span>second &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span class="PreProc">#include </span><span class="Constant">&lt;map&gt;</span>
using std::map<span class="Delimiter">;</span>
<span class="PreProc">#include</span><span class="Constant">&lt;utility&gt;</span>
using std::pair<span class="Delimiter">;</span>
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