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<title>Mu - 062convert_ingredients_to_text.cc</title>
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<span class="Comment">//: make some functions more friendly by trying to auto-convert their ingredients to text</span>
<span class="Delimiter">:(scenarios transform)</span>
<span class="Delimiter">:(scenario rewrite_stashes_to_text)</span>
<span class="muRecipe">def</span> main [
local-scope
<span class="Normal">n</span>:num<span class="Special"> <- </span>copy <span class="Constant">34</span>
stash n
]
<span class="traceContains">+transform: {stash_2_0: ("address" "array" "character")} <- to-text-line {n: "number"}</span>
<span class="traceContains">+transform: stash {stash_2_0: ("address" "array" "character")}</span>
<span class="Delimiter">:(scenario rewrite_traces_to_text)</span>
<span class="muRecipe">def</span> main [
local-scope
<span class="Normal">n</span>:num<span class="Special"> <- </span>copy <span class="Constant">34</span>
trace <span class="Constant">2</span><span class="Delimiter">,</span> [app]<span class="Delimiter">,</span> n
]
<span class="traceContains">+transform: {trace_2_2: ("address" "array" "character")} <- to-text-line {n: "number"}</span>
<span class="traceContains">+transform: trace {2: "literal"}, {"app": "literal-string"}, {trace_2_2: ("address" "array" "character")}</span>
<span class="Comment">//: special case: rewrite attempts to stash contents of most arrays to avoid</span>
<span class="Comment">//: passing addresses around</span>
<span class="Delimiter">:(scenario rewrite_stashes_of_arrays)</span>
<span class="muRecipe">def</span> main [
local-scope
<span class="Normal">n</span>:&:@:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span><span class="Delimiter">,</span> <span class="Constant">3</span>
stash *n
]
<span class="traceContains">+transform: {stash_2_0: ("address" "array" "character")} <- array-to-text-line {n: ("address" "array" "number")}</span>
<span class="traceContains">+transform: stash {stash_2_0: ("address" "array" "character")}</span>
<span class="Delimiter">:(scenario ignore_stashes_of_static_arrays)</span>
<span class="muRecipe">def</span> main [
local-scope
<span class="Normal">n</span>:@:num:<span class="Constant">3</span><span class="Special"> <- </span>create-array
stash n
]
<span class="traceContains">+transform: stash {n: ("array" "number" "3")}</span>
<span class="Delimiter">:(scenario rewrite_stashes_of_recipe_header_products)</span>
<span class="muData">container</span> foo [
<span class="Normal">x</span>:num
]
<span class="muRecipe">def</span> bar<span class="muRecipe"> -> </span>x:foo [
local-scope
load-ingredients
x<span class="Special"> <- </span>merge <span class="Constant">34</span>
stash x
]
<span class="traceContains">+transform: stash {stash_2_0: ("address" "array" "character")}</span>
<span class="Comment">//: misplaced; should be in instruction inserting/deleting transforms, but has</span>
<span class="Comment">//: prerequisites: deduce_types_from_header and check_or_set_types_by_name</span>
<span class="Delimiter">:(after "Transform.push_back(deduce_types_from_header)")</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>convert_ingredients_to_text<span class="Delimiter">);</span> <span class="Comment">// idempotent</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> convert_ingredients_to_text<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
recipe& caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"--- convert some ingredients to text in recipe "</span> << caller<span class="Delimiter">.</span>name << end<span class="Delimiter">();</span>
<span class="Comment">// in recipes without named locations, 'stash' is still not extensible</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>contains_numeric_locations<span class="Delimiter">(</span>caller<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
convert_ingredients_to_text<span class="Delimiter">(</span>caller<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Normal">void</span> convert_ingredients_to_text<span class="Delimiter">(</span>recipe& caller<span class="Delimiter">)</span> <span class="Delimiter">{</span>
vector<instruction> new_instructions<span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
instruction& inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span class="Comment">// all these cases are getting hairy. how can we make this extensible?</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">"stash"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span> j < SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_literal_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
ostringstream ingredient_name<span class="Delimiter">;</span>
ingredient_name << <span class="Constant">"stash_"</span> << i << <span class="Constant">'_'</span> << j << <span class="Constant">":address:array:character"</span><span class="Delimiter">;</span>
convert_ingredient_to_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">),</span> new_instructions<span class="Delimiter">,</span> ingredient_name<span class="Delimiter">.</span>str<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">"trace"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Comment">/*</span><span class="Comment">skip</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">;</span> j < SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_literal_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
ostringstream ingredient_name<span class="Delimiter">;</span>
ingredient_name << <span class="Constant">"trace_"</span> << i << <span class="Constant">'_'</span> << j << <span class="Constant">":address:array:character"</span><span class="Delimiter">;</span>
convert_ingredient_to_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">),</span> new_instructions<span class="Delimiter">,</span> ingredient_name<span class="Delimiter">.</span>str<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>old_name == <span class="Constant">"append"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// override only variants that try to append to a string</span>
<span class="Comment">// Beware: this hack restricts how much 'append' can be overridden. Any</span>
<span class="Comment">// new variants that match:</span>
<span class="Comment">// append _:text, ___</span>
<span class="Comment">// will never ever get used.</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_literal_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span> || is_mu_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span> j < SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
ostringstream ingredient_name<span class="Delimiter">;</span>
ingredient_name << <span class="Constant">"append_"</span> << i << <span class="Constant">'_'</span> << j << <span class="Constant">":address:array:character"</span><span class="Delimiter">;</span>
convert_ingredient_to_text<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">),</span> new_instructions<span class="Delimiter">,</span> ingredient_name<span class="Delimiter">.</span>str<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << to_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << end<span class="Delimiter">();</span>
new_instructions<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>inst<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>swap<span class="Delimiter">(</span>new_instructions<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Comment">// add an instruction to convert reagent 'r' to text in list 'out', then</span>
<span class="Comment">// replace r with converted text</span>
<span class="Normal">void</span> convert_ingredient_to_text<span class="Delimiter">(</span>reagent& r<span class="Delimiter">,</span> vector<instruction>& out<span class="Delimiter">,</span> <span class="Normal">const</span> string& tmp_var<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> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// error; will be handled elsewhere</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_text<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Comment">// don't try to extend static arrays</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_static_array<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
instruction def<span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_lookup_of_address_of_array<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Delimiter">{</span>
def<span class="Delimiter">.</span>name = <span class="Constant">"array-to-text-line"</span><span class="Delimiter">;</span>
reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> tmp = r<span class="Delimiter">;</span>
drop_one_lookup<span class="Delimiter">(</span>tmp<span class="Delimiter">);</span>
def<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>tmp<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Delimiter">{</span>
def<span class="Delimiter">.</span>name = <span class="Constant">"to-text-line"</span><span class="Delimiter">;</span>
def<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
def<span class="Delimiter">.</span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>tmp_var<span class="Delimiter">));</span>
trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << to_string<span class="Delimiter">(</span>def<span class="Delimiter">)</span> << end<span class="Delimiter">();</span>
out<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>def<span class="Delimiter">);</span>
r<span class="Delimiter">.</span>clear<span class="Delimiter">();</span> <span class="Comment">// reclaim old memory</span>
r = reagent<span class="Delimiter">(</span>tmp_var<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Normal">bool</span> is_lookup_of_address_of_array<span class="Delimiter">(</span>reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>left<span class="Delimiter">-></span>name != <span class="Constant">"address"</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!canonize_type<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Identifier">return</span> is_mu_array<span class="Delimiter">(</span>x<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Normal">bool</span> is_static_array<span class="Delimiter">(</span><span class="Normal">const</span> reagent& x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// no canonize_type()</span>
<span class="Identifier">return</span> !x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>atom && x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>left<span class="Delimiter">-></span>atom && x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>left<span class="Delimiter">-></span>name == <span class="Constant">"array"</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenarios run)</span>
<span class="Delimiter">:(scenario append_other_types_to_text)</span>
<span class="muRecipe">def</span> main [
local-scope
<span class="Normal">n</span>:num<span class="Special"> <- </span>copy <span class="Constant">11</span>
<span class="Normal">c</span>:character<span class="Special"> <- </span>copy <span class="Constant">111</span>/o
<span class="Normal">a</span>:text<span class="Special"> <- </span>append [abc]<span class="Delimiter">,</span> <span class="Constant">10</span><span class="Delimiter">,</span> n<span class="Delimiter">,</span> c
<span class="Normal">expected</span>:text<span class="Special"> <- </span><span class="Normal">new</span> [abc1011o]
<span class="Constant">10</span>:<span class="Normal">bool</span>/<span class="Special">raw <- </span>equal a<span class="Delimiter">,</span> expected
]
<span class="Comment">//: Make sure that the new system is strictly better than just the 'stash'</span>
<span class="Comment">//: primitive by itself.</span>
<span class="Delimiter">:(scenario rewrite_stash_continues_to_fall_back_to_default_implementation)</span>
<span class="Comment"># type without a to-text implementation</span>
<span class="muData">container</span> foo [
<span class="Normal">x</span>:num
<span class="Normal">y</span>:num
]
<span class="muRecipe">def</span> main [
local-scope
<span class="Normal">x</span>:foo<span class="Special"> <- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> <span class="Constant">35</span>
stash x
]
<span class="traceContains">+app: 34 35</span>
</pre>
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