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<span class="Comment">//: Arrays contain a variable number of elements of the same type. Their value</span>
<span class="Comment">//: starts with the length of the array.</span>
<span class="Comment">//:</span>
<span class="Comment">//: You can create arrays of containers, but containers can only contain</span>
<span class="Comment">//: elements of a fixed size, so you can't create containers containing arrays.</span>
<span class="Comment">//: Create containers containing addresses to arrays instead.</span>
<span class="Comment">//: You can create arrays using 'create-array'.</span>
<span class="Delimiter">:(scenario create_array)</span>
def main [
<span class="Comment"># create an array occupying locations 1 (for the size) and 2-4 (for the elements)</span>
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
]
<span class="traceContains">+run: creating array of size 4</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
CREATE_ARRAY<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"create-array"</span><span class="Delimiter">,</span> CREATE_ARRAY<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> CREATE_ARRAY: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'create-array' needs one product and no ingredients but got '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
reagent product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize_type<span class="Delimiter">(</span>product<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_array<span class="Delimiter">(</span>product<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'create-array' cannot create non-array "</span> << product<span class="Delimiter">.</span>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!product<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"create array of what? "</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">// 'create-array' will need to check properties rather than types</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!product<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"create array of what size? "</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_integer<span class="Delimiter">(</span>product<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'create-array' product should specify size of array after its element type, but got "</span> << product<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>name << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> CREATE_ARRAY: <span class="Delimiter">{</span>
reagent product = current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize<span class="Delimiter">(</span>product<span class="Delimiter">);</span>
<span class="Normal">int</span> base_address = product<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
<span class="Normal">int</span> array_size = to_integer<span class="Delimiter">(</span>product<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>name<span class="Delimiter">);</span>
<span class="Comment">// initialize array size, so that size_of will work</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> base_address<span class="Delimiter">,</span> array_size<span class="Delimiter">);</span> <span class="Comment">// in array elements</span>
<span class="Normal">int</span> size = size_of<span class="Delimiter">(</span>product<span class="Delimiter">);</span> <span class="Comment">// in locations</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">"creating array of size "</span> << size << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Comment">// initialize array</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">1</span><span class="Delimiter">;</span> i <= size_of<span class="Delimiter">(</span>product<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> base_address+i<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Comment">// dummy product; doesn't actually do anything</span>
products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>array_size<span class="Delimiter">);</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario copy_array)</span>
<span class="Comment"># Arrays can be copied around with a single instruction just like numbers,</span>
<span class="Comment"># no matter how large they are.</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:array:number<span class="Special"> <- </span>copy <span class="Constant">1</span>:array:number:<span class="Constant">3</span>
]
<span class="traceContains">+mem: storing 3 in location 5</span>
<span class="traceContains">+mem: storing 14 in location 6</span>
<span class="traceContains">+mem: storing 15 in location 7</span>
<span class="traceContains">+mem: storing 16 in location 8</span>
<span class="Delimiter">:(scenario copy_array_indirect)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:address:array:number<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
<span class="Constant">6</span>:array:number<span class="Special"> <- </span>copy *<span class="Constant">5</span>:address:array:number
]
<span class="traceContains">+mem: storing 3 in location 6</span>
<span class="traceContains">+mem: storing 14 in location 7</span>
<span class="traceContains">+mem: storing 15 in location 8</span>
<span class="traceContains">+mem: storing 16 in location 9</span>
<span class="Delimiter">:(scenario stash_array)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:array:number:<span class="Constant">3</span>
]
<span class="traceContains">+app: foo: 3 14 15 16</span>
<span class="Comment">//: disable the size mismatch check since the destination array need not be initialized</span>
<span class="Delimiter">:(before "End size_mismatch(x) Cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>type && x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"array"</span><span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End size_of(reagent) Cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>r<span class="Delimiter">.</span>type && r<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"array"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!r<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"'"</span> << r<span class="Delimiter">.</span>original_string << <span class="Constant">"' is an array of what?</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> <span class="Constant">1</span> + get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> r<span class="Delimiter">.</span>value<span class="Delimiter">)</span>*size_of<span class="Delimiter">(</span>array_element<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Comment">//: arrays are disallowed inside containers unless their length is fixed in</span>
<span class="Comment">//: advance</span>
<span class="Delimiter">:(scenario container_contains_array)</span>
container foo [
<span class="Normal">x</span>:array:number:<span class="Constant">3</span>
]
$error: <span class="Constant">0</span>
<span class="Delimiter">:(scenario container_disallows_dynamic_array_element)</span>
<span class="Special">% Hide_errors = true;</span>
container foo [
<span class="Normal">x</span>:array:number
]
<span class="traceContains">+error: container 'foo' cannot determine size of element x</span>
<span class="Delimiter">:(before "End Load Container Element Definition")</span>
<span class="Delimiter">{</span>
<span class="Normal">const</span> type_tree* type = info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>type<span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-></span>name == <span class="Constant">"array"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-></span>right<span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << <span class="Constant">"container '"</span> << name << <span class="Constant">"' doesn't specify type of array elements for "</span> << info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>name << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">)</span> <span class="Delimiter">{</span> <span class="Comment">// array has no length</span>
raise << <span class="Constant">"container '"</span> << name << <span class="Constant">"' cannot determine size of element "</span> << info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>name << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: To access elements of an array, use 'index'</span>
<span class="Delimiter">:(scenario index)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>index <span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 14 in location 5</span>
<span class="Delimiter">:(scenario index_direct_offset)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span class="Constant">6</span>:number<span class="Special"> <- </span>index <span class="Constant">1</span>:array:number<span class="Delimiter">,</span> <span class="Constant">5</span>:number
]
<span class="traceContains">+mem: storing 14 in location 6</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
INDEX<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"index"</span><span class="Delimiter">,</span> INDEX<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> INDEX: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'index' expects exactly 2 ingredients in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
reagent base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize_type<span class="Delimiter">(</span>base<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_array<span class="Delimiter">(</span>base<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'index' on a non-array "</span> << base<span class="Delimiter">.</span>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
reagent product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize_type<span class="Delimiter">(</span>product<span class="Delimiter">);</span>
reagent element<span class="Delimiter">;</span>
element<span class="Delimiter">.</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*array_element<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>product<span class="Delimiter">,</span> element<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'index' on "</span> << base<span class="Delimiter">.</span>original_string << <span class="Constant">" can't be saved in "</span> << product<span class="Delimiter">.</span>original_string << <span class="Constant">"; type should be "</span> << names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> INDEX: <span class="Delimiter">{</span>
reagent base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize<span class="Delimiter">(</span>base<span class="Delimiter">);</span>
<span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</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">"base address is "</span> << base_address << end<span class="Delimiter">();</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"tried to access location 0 in '"</span> << to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
reagent offset = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
canonize<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
vector<<span class="Normal">double</span>> offset_val<span class="Delimiter">(</span>read_memory<span class="Delimiter">(</span>offset<span class="Delimiter">));</span>
type_tree* element_type = array_element<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> < <span class="Constant">0</span> || offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> >= get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> base_address<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"invalid index "</span> << no_scientific<span class="Delimiter">(</span>offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">int</span> src = base_address + <span class="Constant">1</span> + offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>*size_of<span class="Delimiter">(</span>element_type<span class="Delimiter">);</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">"address to copy is "</span> << src << end<span class="Delimiter">();</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">"its type is "</span> << get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> element_type<span class="Delimiter">-></span>value<span class="Delimiter">).</span>name << end<span class="Delimiter">();</span>
reagent tmp<span class="Delimiter">;</span>
tmp<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>src<span class="Delimiter">);</span>
tmp<span class="Delimiter">.</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*element_type<span class="Delimiter">);</span>
products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>read_memory<span class="Delimiter">(</span>tmp<span class="Delimiter">));</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
type_tree* array_element<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>left<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>!type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>left<span class="Delimiter">-></span>left<span class="Delimiter">);</span>
<span class="Identifier">return</span> type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>left<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> type<span class="Delimiter">-></span>right<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario index_indirect)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:address:array:number<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
<span class="Constant">6</span>:number<span class="Special"> <- </span>index *<span class="Constant">5</span>:address:array:number<span class="Delimiter">,</span> <span class="Constant">1</span>
]
<span class="traceContains">+mem: storing 15 in location 6</span>
<span class="Delimiter">:(scenario index_out_of_bounds)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">7</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">8</span>:address:array:point<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
index *<span class="Constant">8</span>:address:array:point<span class="Delimiter">,</span> <span class="Constant">4</span> <span class="Comment"># less than size of array in locations, but larger than its length in elements</span>
]
<span class="traceContains">+error: main: invalid index 4</span>
<span class="Delimiter">:(scenario index_out_of_bounds_2)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
<span class="Constant">1</span>:array:point:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">7</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">8</span>:address:array:point<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
index *<span class="Constant">8</span>:address:array:point<span class="Delimiter">,</span> -<span class="Constant">1</span>
]
<span class="traceContains">+error: main: invalid index -1</span>
<span class="Delimiter">:(scenario index_product_type_mismatch)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
<span class="Constant">1</span>:array:point:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">7</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">8</span>:address:array:point<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
<span class="Constant">9</span>:number<span class="Special"> <- </span>index *<span class="Constant">8</span>:address:array:point<span class="Delimiter">,</span> <span class="Constant">0</span>
]
<span class="traceContains">+error: main: 'index' on *8:address:array:point can't be saved in 9:number; type should be point</span>
<span class="Comment">//: we might want to call 'index' without saving the results, say in a sandbox</span>
<span class="Delimiter">:(scenario index_without_product)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
index <span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">0</span>
]
<span class="Comment"># just don't die</span>
<span class="SalientComment">//:: To write to elements of containers, you need their address.</span>
<span class="Delimiter">:(scenario index_address)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:address:number<span class="Special"> <- </span>index-address <span class="Constant">1</span>:array:number<span class="Delimiter">,</span> <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 2 in location 5</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
INDEX_ADDRESS<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"index-address"</span><span class="Delimiter">,</span> INDEX_ADDRESS<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> INDEX_ADDRESS: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'index-address' expects exactly 2 ingredients in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
reagent base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize_type<span class="Delimiter">(</span>base<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_array<span class="Delimiter">(</span>base<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'index-address' on a non-array "</span> << base<span class="Delimiter">.</span>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
reagent product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize_type<span class="Delimiter">(</span>product<span class="Delimiter">);</span>
reagent element<span class="Delimiter">;</span>
element<span class="Delimiter">.</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span><span class="Constant">"address"</span><span class="Delimiter">,</span> get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"address"</span><span class="Delimiter">),</span>
<span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*array_element<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">)));</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>product<span class="Delimiter">,</span> element<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'index' on "</span> << base<span class="Delimiter">.</span>original_string << <span class="Constant">" can't be saved in "</span> << product<span class="Delimiter">.</span>original_string << <span class="Constant">"; type should be "</span> << names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> INDEX_ADDRESS: <span class="Delimiter">{</span>
reagent base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize<span class="Delimiter">(</span>base<span class="Delimiter">);</span>
<span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"tried to access location 0 in '"</span> << to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
reagent offset = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
canonize<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
vector<<span class="Normal">double</span>> offset_val<span class="Delimiter">(</span>read_memory<span class="Delimiter">(</span>offset<span class="Delimiter">));</span>
type_tree* element_type = array_element<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> < <span class="Constant">0</span> || offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> >= get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> base_address<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"invalid index "</span> << no_scientific<span class="Delimiter">(</span>offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">int</span> result = base_address + <span class="Constant">1</span> + offset_val<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>*size_of<span class="Delimiter">(</span>element_type<span class="Delimiter">);</span>
products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario index_address_out_of_bounds)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
<span class="Constant">1</span>:array:point:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">7</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">8</span>:address:array:point<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
index-address *<span class="Constant">8</span>:address:array:point<span class="Delimiter">,</span> <span class="Constant">4</span> <span class="Comment"># less than size of array in locations, but larger than its length in elements</span>
]
<span class="traceContains">+error: main: invalid index 4</span>
<span class="Delimiter">:(scenario index_address_out_of_bounds_2)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
<span class="Constant">1</span>:array:point:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">7</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">8</span>:address:array:point<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
index-address *<span class="Constant">8</span>:address:array:point<span class="Delimiter">,</span> -<span class="Constant">1</span>
]
<span class="traceContains">+error: main: invalid index -1</span>
<span class="Delimiter">:(scenario index_address_product_type_mismatch)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
<span class="Constant">1</span>:array:point:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">7</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">8</span>:address:array:point<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe
<span class="Constant">9</span>:address:number<span class="Special"> <- </span>index-address *<span class="Constant">8</span>:address:array:point<span class="Delimiter">,</span> <span class="Constant">0</span>
]
<span class="traceContains">+error: main: 'index' on *8:address:array:point can't be saved in 9:address:number; type should be (address point)</span>
<span class="SalientComment">//:: compute the length of an array</span>
<span class="Delimiter">:(scenario array_length)</span>
def main [
<span class="Constant">1</span>:array:number:<span class="Constant">3</span><span class="Special"> <- </span>create-array
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">14</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">15</span>
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">16</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>length <span class="Constant">1</span>:array:number:<span class="Constant">3</span>
]
<span class="traceContains">+mem: storing 3 in location 5</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
LENGTH<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"length"</span><span class="Delimiter">,</span> LENGTH<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> LENGTH: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'length' expects exactly 2 ingredients in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
reagent x = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize_type<span class="Delimiter">(</span>x<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_array<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << <span class="Constant">"tried to calculate length of non-array "</span> << x<span class="Delimiter">.</span>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> LENGTH: <span class="Delimiter">{</span>
reagent x = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize<span class="Delimiter">(</span>x<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>value == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"tried to access location 0 in '"</span> << to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> x<span class="Delimiter">.</span>value<span class="Delimiter">));</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">//: optimization: none of the instructions in this layer use 'ingredients' so</span>
<span class="Comment">//: stop copying potentially huge arrays into it.</span>
<span class="Delimiter">:(before "End should_copy_ingredients Special-cases")</span>
recipe_ordinal r = current_instruction<span class="Delimiter">().</span>operation<span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>r == CREATE_ARRAY || r == INDEX || r == INDEX_ADDRESS || r == LENGTH<span class="Delimiter">)</span>
<span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Comment">//: a particularly common array type is the string, or address:array:character</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">bool</span> is_mu_string<span class="Delimiter">(</span><span class="Normal">const</span> reagent& x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Identifier">return</span> x<span class="Delimiter">.</span>type
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"address"</span><span class="Delimiter">)</span>
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"shared"</span><span class="Delimiter">)</span>
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"array"</span><span class="Delimiter">)</span>
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"character"</span><span class="Delimiter">)</span>
&& x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right<span class="Delimiter">-></span>right == <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
</pre>
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