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<pre id='vimCodeElement'>
<span class="Comment">//: Allow code for recipes to be pulled in from multiple places.</span>
<span class="Comment">//:</span>
<span class="Comment">//: TODO: switch recipe.steps to a more efficient data structure.</span>
<span class="Delimiter">:(scenario tangle_before)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
+label1
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 0 in location 1</span>
<span class="traceContains">+mem: storing 0 in location 2</span>
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">3</span>
<span class="Comment">//: while loading recipes, load before/after fragments</span>
<span class="Delimiter">:(before "End Globals")</span>
map<string <span class="Comment">/*</span><span class="Comment">label</span><span class="Comment">*/</span><span class="Delimiter">,</span> recipe> Before_fragments<span class="Delimiter">,</span> After_fragments<span class="Delimiter">;</span>
set<string <span class="Comment">/*</span><span class="Comment">label</span><span class="Comment">*/</span>> Fragments_used<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Setup")</span>
Before_fragments<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
After_fragments<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
Fragments_used<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
<span class="Delimiter">:(before "End Command Handlers")</span>
else if <span class="Delimiter">(</span>command == <span class="Constant">"before"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
string label = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
recipe tmp = slurp_recipe<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="CommentedCode">//? cerr << "adding before fragment " << label << '\n'; //? 1</span>
Before_fragments[label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>Before_fragments[label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> tmp<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> tmp<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>end<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
else if <span class="Delimiter">(</span>command == <span class="Constant">"after"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
string label = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
recipe tmp = slurp_recipe<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="CommentedCode">//? cerr << "adding after fragment " << label << '\n'; //? 1</span>
After_fragments[label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>After_fragments[label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> tmp<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> tmp<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>end<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
<span class="Comment">//: after all recipes are loaded, insert fragments at appropriate labels.</span>
<span class="Delimiter">:(after "int main")</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>insert_fragments<span class="Delimiter">);</span>
<span class="Comment">//; We might need to perform multiple passes, in case inserted fragments</span>
<span class="Comment">//: include more labels that need further insertions. Track which labels we've</span>
<span class="Comment">//: already processed using an extra field.</span>
<span class="Delimiter">:(before "End instruction Fields")</span>
mutable bool tangle_done<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End instruction Constructor")</span>
tangle_done = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(code)</span>
void insert_fragments<span class="Delimiter">(</span>const recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
bool made_progress = <span class="Constant">true</span><span class="Delimiter">;</span>
while <span class="Delimiter">(</span>made_progress<span class="Delimiter">)</span> <span class="Delimiter">{</span>
made_progress = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Comment">// create a new vector because insertions invalidate iterators</span>
vector<instruction> result<span class="Delimiter">;</span>
for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>Recipe[r]<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
const instruction inst = Recipe[r]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>!inst<span class="Delimiter">.</span>is_label || inst<span class="Delimiter">.</span>tangle_done<span class="Delimiter">)</span> <span class="Delimiter">{</span>
result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>inst<span class="Delimiter">);</span>
<span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
inst<span class="Delimiter">.</span>tangle_done = <span class="Constant">true</span><span class="Delimiter">;</span>
made_progress = <span class="Constant">true</span><span class="Delimiter">;</span>
Fragments_used<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>label<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>Before_fragments<span class="Delimiter">.</span>find<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>label<span class="Delimiter">)</span> != Before_fragments<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//? cerr << "loading code before " << inst.label << '\n'; //? 1</span>
result<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>result<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> Before_fragments[inst<span class="Delimiter">.</span>label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> Before_fragments[inst<span class="Delimiter">.</span>label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>end<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>inst<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>After_fragments<span class="Delimiter">.</span>find<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>label<span class="Delimiter">)</span> != After_fragments<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//? cerr << "loading code after " << inst.label << '\n'; //? 1</span>
result<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>result<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> After_fragments[inst<span class="Delimiter">.</span>label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> After_fragments[inst<span class="Delimiter">.</span>label]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>end<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
Recipe[r]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>swap<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Comment">//: warn about unapplied fragments</span>
<span class="Delimiter">:(before "End Globals")</span>
bool Transform_check_insert_fragments_Ran = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End One-time Setup")</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_insert_fragments<span class="Delimiter">);</span> <span class="Comment">// final transform</span>
<span class="Delimiter">:(code)</span>
void check_insert_fragments<span class="Delimiter">(</span>unused recipe_ordinal<span class="Delimiter">)</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>Transform_check_insert_fragments_Ran<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
Transform_check_insert_fragments_Ran = <span class="Constant">true</span><span class="Delimiter">;</span>
for <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> recipe>::iterator p = Before_fragments<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Before_fragments<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>Fragments_used<span class="Delimiter">.</span>find<span class="Delimiter">(</span>p<span class="Delimiter">-></span>first<span class="Delimiter">)</span> == Fragments_used<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
raise << <span class="Constant">"could not locate insert before "</span> << p<span class="Delimiter">-></span>first << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
for <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> recipe>::iterator p = After_fragments<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != After_fragments<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>Fragments_used<span class="Delimiter">.</span>find<span class="Delimiter">(</span>p<span class="Delimiter">-></span>first<span class="Delimiter">)</span> == Fragments_used<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
raise << <span class="Constant">"could not locate insert after "</span> << p<span class="Delimiter">-></span>first << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario tangle_before_and_after)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
+label1
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
after +label1 [
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 0 in location 1</span>
<span class="traceContains">+mem: storing 0 in location 2</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="traceContains">+mem: storing 0 in location 4</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">4</span>
<span class="Delimiter">:(scenario tangle_keeps_labels_separate)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
+label1
+label2
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
after +label1 [
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
before +label2 [
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
after +label2 [
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 0 in location 1</span>
<span class="traceContains">+mem: storing 0 in location 2</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="Comment"># 'after' fragments for earlier label always go before 'before' fragments for later label</span>
<span class="traceContains">+mem: storing 0 in location 4</span>
<span class="Comment"># label2</span>
<span class="traceContains">+mem: storing 0 in location 5</span>
<span class="traceContains">+mem: storing 0 in location 6</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">6</span>
<span class="Delimiter">:(scenario tangle_stacks_multiple_fragments)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
+label1
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
after +label1 [
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
before +label1 [
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
after +label1 [
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 0 in location 1</span>
<span class="Comment"># 'before' fragments stack in order</span>
<span class="traceContains">+mem: storing 0 in location 2</span>
<span class="traceContains">+mem: storing 0 in location 4</span>
<span class="Comment"># label1</span>
<span class="Comment"># 'after' fragments stack in reverse order</span>
<span class="traceContains">+mem: storing 0 in location 5</span>
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="traceContains">+mem: storing 0 in location 6</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">6</span>
<span class="Delimiter">:(scenario tangle_supports_fragments_with_multiple_instructions)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
+label1
<span class="Constant">6</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
after +label1 [
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span class="Constant">5</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+mem: storing 0 in location 1</span>
<span class="traceContains">+mem: storing 0 in location 2</span>
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 0 in location 4</span>
<span class="traceContains">+mem: storing 0 in location 5</span>
<span class="traceContains">+mem: storing 0 in location 6</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">6</span>
<span class="Delimiter">:(scenario tangle_tangles_into_all_labels_with_same_name)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span>
+label1
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span>
recipe2
]
recipe recipe2 [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">11</span>
+label1
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">11</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">12</span>
]
after +label1 [
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">12</span>
]
<span class="traceContains">+mem: storing 10 in location 1</span>
<span class="traceContains">+mem: storing 12 in location 2</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 12 in location 3</span>
<span class="traceContains">+mem: storing 10 in location 4</span>
<span class="Comment"># recipe2</span>
<span class="traceContains">+mem: storing 11 in location 1</span>
<span class="traceContains">+mem: storing 12 in location 2</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 12 in location 3</span>
<span class="traceContains">+mem: storing 11 in location 4</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">8</span>
<span class="Delimiter">:(scenario tangle_tangles_into_all_labels_with_same_name_2)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span>
+label1
+label1
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">12</span>
]
after +label1 [
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">12</span>
]
<span class="traceContains">+mem: storing 10 in location 1</span>
<span class="traceContains">+mem: storing 12 in location 2</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 12 in location 3</span>
<span class="traceContains">+mem: storing 12 in location 2</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 12 in location 3</span>
<span class="traceContains">+mem: storing 10 in location 4</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">6</span>
<span class="Delimiter">:(scenario tangle_tangles_into_all_labels_with_same_name_3)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span>
+label1
+foo
<span class="Constant">4</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span>
]
before +label1 [
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">12</span>
]
after +label1 [
<span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">12</span>
]
after +foo [
+label1
]
<span class="traceContains">+mem: storing 10 in location 1</span>
<span class="traceContains">+mem: storing 12 in location 2</span>
<span class="Comment"># label1</span>
<span class="traceContains">+mem: storing 12 in location 3</span>
<span class="traceContains">+mem: storing 12 in location 2</span>
<span class="Comment"># +foo/label1</span>
<span class="traceContains">+mem: storing 12 in location 3</span>
<span class="traceContains">+mem: storing 10 in location 4</span>
<span class="Comment"># nothing else</span>
$mem: <span class="Constant">6</span>
</pre>
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