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<span class="SalientComment">//:: Container definitions can contain type parameters.</span>
<span class="Comment">//:</span>
<span class="Comment">//: Extremely hacky initial implementation. We still don't support the full</span>
<span class="Comment">//: complexity of type trees inside container definitions. So for example you</span>
<span class="Comment">//: can't have a container element with this type:</span>
<span class="Comment">//: (map (array address character) (list number))</span>
<span class="Delimiter">:(scenario size_of_shape_shifting_container)</span>
container foo:_t [
x:_t
y:number
]
recipe main [
<span class="Constant">1</span>:foo:number<span class="Special"> <- </span>merge <span class="Constant">12</span><span class="Delimiter">,</span> <span class="Constant">13</span>
<span class="Constant">3</span>:foo:point<span class="Special"> <- </span>merge <span class="Constant">14</span><span class="Delimiter">,</span> <span class="Constant">15</span><span class="Delimiter">,</span> <span class="Constant">16</span>
]
<span class="traceContains">+mem: storing 12 in location 1</span>
<span class="traceContains">+mem: storing 13 in location 2</span>
<span class="traceContains">+mem: storing 14 in location 3</span>
<span class="traceContains">+mem: storing 15 in location 4</span>
<span class="traceContains">+mem: storing 16 in location 5</span>
<span class="Delimiter">:(before "End Globals")</span>
<span class="Comment">// We'll use large type ordinals to mean "the following type of the variable".</span>
const int START_TYPE_INGREDIENTS = <span class="Constant">2000</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Test Run Initialization")</span>
assert<span class="Delimiter">(</span>Next_type_ordinal < START_TYPE_INGREDIENTS<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End type_info Fields")</span>
map<string<span class="Delimiter">,</span> type_ordinal> type_ingredient_names<span class="Delimiter">;</span>
<span class="Comment">//: Suppress unknown type checks in shape-shifting containers.</span>
<span class="Delimiter">:(before "Check Container Field Types(info)")</span>
if <span class="Delimiter">(</span>!info<span class="Delimiter">.</span>type_ingredient_names<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End container Name Refinements")</span>
if <span class="Delimiter">(</span>name<span class="Delimiter">.</span>find<span class="Delimiter">(</span><span class="Constant">':'</span><span class="Delimiter">)</span> != string::npos<span class="Delimiter">)</span> <span class="Delimiter">{</span>
trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">"container has type ingredients; parsing"</span> << end<span class="Delimiter">();</span>
read_type_ingredients<span class="Delimiter">(</span>name<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
void read_type_ingredients<span class="Delimiter">(</span>string& name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
string save_name = name<span class="Delimiter">;</span>
istringstream in<span class="Delimiter">(</span>save_name<span class="Delimiter">);</span>
name = slurp_until<span class="Delimiter">(</span>in<span class="Delimiter">,</span> <span class="Constant">':'</span><span class="Delimiter">);</span>
if <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span>
put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
type_info& info = get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">));</span>
long long int next_type_ordinal = START_TYPE_INGREDIENTS<span class="Delimiter">;</span>
while <span class="Delimiter">(</span>!in<span class="Delimiter">.</span>eof<span class="Delimiter">())</span> <span class="Delimiter">{</span>
string curr = slurp_until<span class="Delimiter">(</span>in<span class="Delimiter">,</span> <span class="Constant">':'</span><span class="Delimiter">);</span>
if <span class="Delimiter">(</span>info<span class="Delimiter">.</span>type_ingredient_names<span class="Delimiter">.</span>find<span class="Delimiter">(</span>curr<span class="Delimiter">)</span> != info<span class="Delimiter">.</span>type_ingredient_names<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
raise_error << <span class="Constant">"can't repeat type ingredient names in a single container definition</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
put<span class="Delimiter">(</span>info<span class="Delimiter">.</span>type_ingredient_names<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> next_type_ordinal++<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End insert_container Special Uses(type_name)")</span>
<span class="Comment">// check for use of type ingredients</span>
if <span class="Delimiter">(</span>type_name<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == <span class="Constant">'_'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
*curr_type = new type_tree<span class="Delimiter">(</span>get<span class="Delimiter">(</span>info<span class="Delimiter">.</span>type_ingredient_names<span class="Delimiter">,</span> type_name<span class="Delimiter">));</span>
trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"parse"</span><span class="Delimiter">)</span> << <span class="Constant">" type: "</span> << get<span class="Delimiter">(</span>info<span class="Delimiter">.</span>type_ingredient_names<span class="Delimiter">,</span> type_name<span class="Delimiter">)</span> << end<span class="Delimiter">();</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Container Type Checks")</span>
if <span class="Delimiter">(</span>type<span class="Delimiter">-></span>value >= START_TYPE_INGREDIENTS
&& <span class="Delimiter">(</span>type<span class="Delimiter">-></span>value - START_TYPE_INGREDIENTS<span class="Delimiter">)</span> < SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-></span>value<span class="Delimiter">).</span>type_ingredient_names<span class="Delimiter">))</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End size_of(type) Container Cases")</span>
if <span class="Delimiter">(</span>t<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>value >= START_TYPE_INGREDIENTS<span class="Delimiter">)</span> <span class="Delimiter">{</span>
trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"type"</span><span class="Delimiter">)</span> << <span class="Constant">"checking size of type ingredient</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
long long int size = size_of_type_ingredient<span class="Delimiter">(</span>t<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> type<span class="Delimiter">-></span>right<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>!size<span class="Delimiter">)</span>
raise_error << <span class="Constant">"illegal type '"</span> << debug_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> << <span class="Constant">"' seems to be missing a type ingredient or three</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
result += size<span class="Delimiter">;</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
<span class="Comment">// shape-shifting version of size_of</span>
long long int size_of_type_ingredient<span class="Delimiter">(</span>const type_tree* element_template<span class="Delimiter">,</span> const type_tree* rest_of_use<span class="Delimiter">)</span> <span class="Delimiter">{</span>
long long int type_ingredient_index = element_template<span class="Delimiter">-></span>value - START_TYPE_INGREDIENTS<span class="Delimiter">;</span>
const type_tree* curr = rest_of_use<span class="Delimiter">;</span>
if <span class="Delimiter">(</span>!curr<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
while <span class="Delimiter">(</span>type_ingredient_index > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
--type_ingredient_index<span class="Delimiter">;</span>
curr = curr<span class="Delimiter">-></span>right<span class="Delimiter">;</span>
if <span class="Delimiter">(</span>!curr<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
assert<span class="Delimiter">(</span>curr<span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>!curr<span class="Delimiter">-></span>left<span class="Delimiter">);</span> <span class="Comment">// unimplemented</span>
if <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> curr<span class="Delimiter">-></span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span class="Comment">// temporarily while we're still ironing out kinks; eventually replace with a raise_error</span>
<span class="CommentedCode">//? DUMP("");</span>
cerr << <span class="Constant">"missing type "</span> << debug_string<span class="Delimiter">(</span>curr<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
exit<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> curr<span class="Delimiter">-></span>value<span class="Delimiter">));</span>
trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"type"</span><span class="Delimiter">)</span> << <span class="Constant">"type deduced to be "</span> << get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> curr<span class="Delimiter">-></span>value<span class="Delimiter">).</span>name << <span class="Constant">"$"</span> << end<span class="Delimiter">();</span>
type_tree tmp<span class="Delimiter">(</span>curr<span class="Delimiter">-></span>value<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>curr<span class="Delimiter">-></span>right<span class="Delimiter">)</span>
tmp<span class="Delimiter">.</span>right = new type_tree<span class="Delimiter">(</span>*curr<span class="Delimiter">-></span>right<span class="Delimiter">);</span>
<span class="Identifier">return</span> size_of<span class="Delimiter">(</span>&tmp<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario get_on_shape_shifting_container)</span>
container foo:_t [
x:_t
y:number
]
recipe main [
<span class="Constant">1</span>:foo:point<span class="Special"> <- </span>merge <span class="Constant">14</span><span class="Delimiter">,</span> <span class="Constant">15</span><span class="Delimiter">,</span> <span class="Constant">16</span>
<span class="Constant">2</span>:number<span class="Special"> <- </span>get <span class="Constant">1</span>:foo:point<span class="Delimiter">,</span> y:offset
]
<span class="traceContains">+mem: storing 16 in location 2</span>
<span class="Delimiter">:(before "End GET field Cases")</span>
const type_tree* type = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>type<span class="Delimiter">-></span>value >= START_TYPE_INGREDIENTS<span class="Delimiter">)</span> <span class="Delimiter">{</span>
long long int size = size_of_type_ingredient<span class="Delimiter">(</span>type<span class="Delimiter">,</span> base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>!size<span class="Delimiter">)</span>
raise_error << <span class="Constant">"illegal field type '"</span> << debug_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> << <span class="Constant">"' seems to be missing a type ingredient or three</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
src += size<span class="Delimiter">;</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario get_on_shape_shifting_container_2)</span>
container foo:_t [
x:_t
y:number
]
recipe main [
<span class="Constant">1</span>:foo:point<span class="Special"> <- </span>merge <span class="Constant">14</span><span class="Delimiter">,</span> <span class="Constant">15</span><span class="Delimiter">,</span> <span class="Constant">16</span>
<span class="Constant">2</span>:point<span class="Special"> <- </span>get <span class="Constant">1</span>:foo:point<span class="Delimiter">,</span> x:offset
]
<span class="traceContains">+mem: storing 14 in location 2</span>
<span class="traceContains">+mem: storing 15 in location 3</span>
<span class="Delimiter">:(scenario get_on_shape_shifting_container_3)</span>
container foo:_t [
x:_t
y:number
]
recipe main [
<span class="Constant">1</span>:foo:address:point<span class="Special"> <- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> <span class="Constant">48</span> <span class="Comment"># unsafe</span>
<span class="Constant">2</span>:address:point<span class="Special"> <- </span>get <span class="Constant">1</span>:foo:address:point<span class="Delimiter">,</span> x:offset
]
<span class="traceContains">+mem: storing 34 in location 2</span>
<span class="Delimiter">:(before "End element_type Special-cases")</span>
if <span class="Delimiter">(</span>contains_type_ingredient<span class="Delimiter">(</span>element<span class="Delimiter">))</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>!canonized_base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">)</span>
raise_error << <span class="Constant">"illegal type '"</span> << debug_string<span class="Delimiter">(</span>canonized_base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> << <span class="Constant">"' seems to be missing a type ingredient or three</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
replace_type_ingredient<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">,</span> canonized_base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
bool contains_type_ingredient<span class="Delimiter">(</span>const reagent& x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Identifier">return</span> contains_type_ingredient<span class="Delimiter">(</span>x<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
bool contains_type_ingredient<span class="Delimiter">(</span>const type_tree* type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
if <span class="Delimiter">(</span>type<span class="Delimiter">-></span>value >= START_TYPE_INGREDIENTS<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Identifier">return</span> contains_type_ingredient<span class="Delimiter">(</span>type<span class="Delimiter">-></span>left<span class="Delimiter">)</span> || contains_type_ingredient<span class="Delimiter">(</span>type<span class="Delimiter">-></span>right<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
void replace_type_ingredient<span class="Delimiter">(</span>type_tree* element_type<span class="Delimiter">,</span> const type_tree* callsite_type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>!callsite_type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// error but it's already been raised above</span>
if <span class="Delimiter">(</span>!element_type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
if <span class="Delimiter">(</span>element_type<span class="Delimiter">-></span>value >= START_TYPE_INGREDIENTS<span class="Delimiter">)</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>!has_nth_type<span class="Delimiter">(</span>callsite_type<span class="Delimiter">,</span> element_type<span class="Delimiter">-></span>value-START_TYPE_INGREDIENTS<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise_error << <span class="Constant">"illegal type '"</span> << debug_string<span class="Delimiter">(</span>callsite_type<span class="Delimiter">)</span> << <span class="Constant">"' seems to be missing a type ingredient or three</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
const type_tree* replacement = nth_type<span class="Delimiter">(</span>callsite_type<span class="Delimiter">,</span> element_type<span class="Delimiter">-></span>value-START_TYPE_INGREDIENTS<span class="Delimiter">);</span>
element_type<span class="Delimiter">-></span>value = replacement<span class="Delimiter">-></span>value<span class="Delimiter">;</span>
element_type<span class="Delimiter">-></span>left = replacement<span class="Delimiter">-></span>left ? new type_tree<span class="Delimiter">(</span>*replacement<span class="Delimiter">-></span>left<span class="Delimiter">)</span> : <span class="Constant">NULL</span><span class="Delimiter">;</span>
element_type<span class="Delimiter">-></span>right = replacement<span class="Delimiter">-></span>right ? new type_tree<span class="Delimiter">(</span>*replacement<span class="Delimiter">-></span>right<span class="Delimiter">)</span> : <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
replace_type_ingredient<span class="Delimiter">(</span>element_type<span class="Delimiter">-></span>right<span class="Delimiter">,</span> callsite_type<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
const type_tree* nth_type<span class="Delimiter">(</span>const type_tree* base<span class="Delimiter">,</span> long long int n<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>n >= <span class="Constant">0</span><span class="Delimiter">);</span>
if <span class="Delimiter">(</span>n == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> base<span class="Delimiter">;</span>
<span class="Identifier">return</span> nth_type<span class="Delimiter">(</span>base<span class="Delimiter">-></span>right<span class="Delimiter">,</span> n-<span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
bool has_nth_type<span class="Delimiter">(</span>const type_tree* base<span class="Delimiter">,</span> long long int n<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>n >= <span class="Constant">0</span><span class="Delimiter">);</span>
if <span class="Delimiter">(</span>base == <span class="Constant">NULL</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
if <span class="Delimiter">(</span>n == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Identifier">return</span> has_nth_type<span class="Delimiter">(</span>base<span class="Delimiter">-></span>right<span class="Delimiter">,</span> n-<span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario get_on_shape_shifting_container_error)</span>
<span class="Special">% Hide_errors = true;</span>
container foo:_t [
x:_t
y:number
]
recipe main [
<span class="Constant">10</span>:foo:point<span class="Special"> <- </span>merge <span class="Constant">14</span><span class="Delimiter">,</span> <span class="Constant">15</span><span class="Delimiter">,</span> <span class="Constant">16</span>
<span class="Constant">1</span>:number<span class="Special"> <- </span>get <span class="Constant">10</span>:foo<span class="Delimiter">,</span> <span class="Constant">1</span>:offset
]
<span class="traceContains">+error: illegal type 'foo' seems to be missing a type ingredient or three</span>
<span class="Comment">//: get-address similarly</span>
<span class="Delimiter">:(scenario get_address_on_shape_shifting_container)</span>
container foo:_t [
x:_t
y:number
]
recipe main [
<span class="Constant">10</span>:foo:point<span class="Special"> <- </span>merge <span class="Constant">14</span><span class="Delimiter">,</span> <span class="Constant">15</span><span class="Delimiter">,</span> <span class="Constant">16</span>
<span class="Constant">1</span>:address:number<span class="Special"> <- </span>get-address <span class="Constant">10</span>:foo:point<span class="Delimiter">,</span> <span class="Constant">1</span>:offset
]
<span class="traceContains">+mem: storing 12 in location 1</span>
<span class="Delimiter">:(before "End GET_ADDRESS field Cases")</span>
const type_tree* type = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>type<span class="Delimiter">-></span>value >= START_TYPE_INGREDIENTS<span class="Delimiter">)</span> <span class="Delimiter">{</span>
long long int size = size_of_type_ingredient<span class="Delimiter">(</span>type<span class="Delimiter">,</span> base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>!size<span class="Delimiter">)</span>
raise_error << <span class="Constant">"illegal type '"</span> << debug_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> << <span class="Constant">"' seems to be missing a type ingredient or three</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
result += size<span class="Delimiter">;</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario get_on_shape_shifting_container_inside_shape_shifting_container)</span>
container foo:_t [
x:_t
y:number
]
container bar [
x:foo:point
y:number
]
recipe main [
<span class="Constant">1</span>:bar<span class="Special"> <- </span>merge <span class="Constant">14</span><span class="Delimiter">,</span> <span class="Constant">15</span><span class="Delimiter">,</span> <span class="Constant">16</span><span class="Delimiter">,</span> <span class="Constant">17</span>
<span class="Constant">2</span>:number<span class="Special"> <- </span>get <span class="Constant">1</span>:bar<span class="Delimiter">,</span> <span class="Constant">1</span>:offset
]
<span class="traceContains">+mem: storing 17 in location 2</span>
</pre>
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