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<pre id='vimCodeElement'>
<span class="Comment">//: For convenience, make some common types shorter.</span>
<span class="Comment">//:</span>
<span class="Comment">//: a) Rewrite '&t' to 'address:t' and '@t' to 'array:type' (with the</span>
<span class="Comment">//: ability to chain any combination of the two). This is not extensible.</span>
<span class="Comment">//:</span>
<span class="Comment">//: b) Provide a facility to create new type names out of old ones.</span>
<span class="SalientComment">//:: a) expanding '&' and '@'</span>
<span class="Delimiter">:(scenarios load)</span>
<span class="Delimiter">:(scenario abbreviations_for_address_and_array)</span>
def main [
f <span class="Constant">1</span>:&number <span class="Comment"># abbreviation for 'address:number'</span>
f <span class="Constant">2</span>:@number <span class="Comment"># abbreviation for 'array:number'</span>
f <span class="Constant">3</span>:&@number <span class="Comment"># combining '&' and '@'</span>
f <span class="Constant">4</span>:&&@&@number <span class="Comment"># ..any number of times</span>
f <span class="Constant">5</span>:array:&number:<span class="Constant">3</span> <span class="Comment"># abbreviations take precedence over ':'</span>
f <span class="Delimiter">{</span><span class="Constant">6</span>: <span class="Delimiter">(</span>array &number <span class="Constant">3</span><span class="Delimiter">)}</span> <span class="Comment"># support for dilated reagents and more complex parse trees</span>
f <span class="Constant">7</span>:@number:<span class="Constant">3</span> <span class="Comment"># *not* the same as array:number:3</span>
]
<span class="traceContains">+parse: ingredient: {1: ("address" "number")}</span>
<span class="traceContains">+parse: ingredient: {2: ("array" "number")}</span>
<span class="traceContains">+parse: ingredient: {3: ("address" "array" "number")}</span>
<span class="traceContains">+parse: ingredient: {4: ("address" "address" "array" "address" "array" "number")}</span>
<span class="traceContains">+parse: ingredient: {5: ("array" ("address" "number") "3")}</span>
<span class="traceContains">+parse: ingredient: {6: ("array" ("address" "number") "3")}</span>
<span class="Comment"># not what you want</span>
<span class="traceContains">+parse: ingredient: {7: (("array" "number") "3")}</span>
<span class="Delimiter">:(scenario abbreviation_error)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
f <span class="Constant">1</span>:&&@& <span class="Comment"># abbreviations without payload</span>
]
<span class="traceContains">+error: invalid type abbreviation &&@&</span>
<span class="Delimiter">:(before "End Parsing Reagent Type Property(type_names)")</span>
string_tree* new_type_names = replace_address_and_array_symbols<span class="Delimiter">(</span>type_names<span class="Delimiter">);</span>
<span class="Normal">delete</span> type_names<span class="Delimiter">;</span>
type_names = new_type_names<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Parsing Dilated Reagent Type Property(type_names)")</span>
string_tree* new_type_names = replace_address_and_array_symbols<span class="Delimiter">(</span>type_names<span class="Delimiter">);</span>
<span class="Normal">delete</span> type_names<span class="Delimiter">;</span>
type_names = new_type_names<span class="Delimiter">;</span>
<span class="Delimiter">:(code)</span>
<span class="Comment">// simple version; lots of unnecessary allocations; always creates a new pointer</span>
string_tree* replace_address_and_array_symbols<span class="Delimiter">(</span>string_tree* orig<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>orig == <span class="Constant">NULL</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>orig<span class="Delimiter">-></span>atom<span class="Delimiter">)</span>
<span class="Identifier">return</span> replace_address_and_array_symbols<span class="Delimiter">(</span>orig<span class="Delimiter">-></span>value<span class="Delimiter">);</span>
<span class="Identifier">return</span> <span class="Normal">new</span> string_tree<span class="Delimiter">(</span>replace_address_and_array_symbols<span class="Delimiter">(</span>orig<span class="Delimiter">-></span>left<span class="Delimiter">),</span>
replace_address_and_array_symbols<span class="Delimiter">(</span>orig<span class="Delimiter">-></span>right<span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Comment">// todo: unicode</span>
string_tree* replace_address_and_array_symbols<span class="Delimiter">(</span><span class="Normal">const</span> string& type_name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>type_name<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <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> && 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="Identifier">return</span> <span class="Normal">new</span> string_tree<span class="Delimiter">(</span>type_name<span class="Delimiter">);</span>
string_tree* result = <span class="Constant">NULL</span><span class="Delimiter">;</span>
string_tree* curr = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">while</span> <span class="Delimiter">(</span>i < SIZE<span class="Delimiter">(</span>type_name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
string_tree* new_node = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>type_name<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == <span class="Constant">'&'</span><span class="Delimiter">)</span>
new_node = <span class="Normal">new</span> string_tree<span class="Delimiter">(</span><span class="Constant">"address"</span><span class="Delimiter">);</span>
<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>type_name<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == <span class="Constant">'@'</span><span class="Delimiter">)</span>
new_node = <span class="Normal">new</span> string_tree<span class="Delimiter">(</span><span class="Constant">"array"</span><span class="Delimiter">);</span>
<span class="Normal">else</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>result == <span class="Constant">NULL</span><span class="Delimiter">)</span>
result = curr = <span class="Normal">new</span> string_tree<span class="Delimiter">(</span>new_node<span class="Delimiter">,</span> <span class="Constant">NULL</span><span class="Delimiter">);</span>
<span class="Normal">else</span> <span class="Delimiter">{</span>
curr<span class="Delimiter">-></span>right = <span class="Normal">new</span> string_tree<span class="Delimiter">(</span>new_node<span class="Delimiter">,</span> <span class="Constant">NULL</span><span class="Delimiter">);</span>
curr = curr<span class="Delimiter">-></span>right<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
++i<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>i < SIZE<span class="Delimiter">(</span>type_name<span class="Delimiter">))</span>
curr<span class="Delimiter">-></span>right = <span class="Normal">new</span> string_tree<span class="Delimiter">(</span>type_name<span class="Delimiter">.</span>substr<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
<span class="Normal">else</span>
raise << <span class="Constant">"invalid type abbreviation "</span> << type_name << <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: b) extensible type abbreviations</span>
<span class="Delimiter">:(before "End Globals")</span>
map<string<span class="Delimiter">,</span> type_tree*> Type_abbreviations<span class="Delimiter">;</span>
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