https://github.com/akkartik/mu/blob/master/998check_type_pointers.cc
 1 //: enable this when tracking down null types
 2 //: (but it interferes with edit/; since recipes created in the environment
 3 //: can raise warnings here which will stop running the entire environment)
 4 //? :(before "End Transform All")
 5 //? check_type_pointers();
 6 //? 
 7 //? :(code)
 8 //? void check_type_pointers() {
 9 //?   for (map<recipe_ordinal, recipe>::iterator p = Recipe.begin(); p != Recipe.end(); ++p) {
10 //?     if (any_type_ingredient_in_header(p->first)) continue;
11 //?     const recipe& r = p->second;
12 //?     for (long long int i = 0; i < SIZE(r.steps); ++i) {
13 //?       const instruction& inst = r.steps.at(i);
14 //?       for (long long int j = 0; j < SIZE(inst.ingredients); ++j) {
15 //?         if (!inst.ingredients.at(j).type) {
16 //?           raise_error << maybe(r.name) << " '" << inst.to_string() << "' -- " << inst.ingredients.at(j).to_string() << " has no type\n" << end();
17 //?           return;
18 //?         }
19 //?         if (!inst.ingredients.at(j).properties.at(0).second) {
20 //?           raise_error << maybe(r.name) << " '" << inst.to_string() << "' -- " << inst.ingredients.at(j).to_string() << " has no type name\n" << end();
21 //?           return;
22 //?         }
23 //?       }
24 //?       for (long long int j = 0; j < SIZE(inst.products); ++j) {
25 //?         if (!inst.products.at(j).type) {
26 //?           raise_error << maybe(r.name) << " '" << inst.to_string() << "' -- " << inst.products.at(j).to_string() << " has no type\n" << end();
27 //?           return;
28 //?         }
29 //?         if (!inst.products.at(j).properties.at(0).second) {
30 //?           raise_error << maybe(r.name) << " '" << inst.to_string() << "' -- " << inst.products.at(j).to_string() << " has no type name\n" << end();
31 //?           return;
32 //?         }
33 //?       }
34 //?     }
35 //?   }
36 //? }