1
2
3 :(scenario return)
4 def main [
5 1:num, 2:num <- f 34
6 ]
7 def f [
8 12:num <- next-ingredient
9 13:num <- add 1, 12:num
10 return 12:num, 13:num
11 ]
12 +mem: storing 34 in location 1
13 +mem: storing 35 in location 2
14
15 :(scenario reply)
16 def main [
17 1:num, 2:num <- f 34
18 ]
19 def f [
20 12:num <- next-ingredient
21 13:num <- add 1, 12:num
22 reply 12:num, 13:num
23 ]
24 +mem: storing 34 in location 1
25 +mem: storing 35 in location 2
26
27 :(before "End Primitive Recipe Declarations")
28 RETURN,
29 :(before "End Primitive Recipe Numbers")
30 put(Recipe_ordinal, "return", RETURN);
31 put(Recipe_ordinal, "reply", RETURN);
32 :(before "End Primitive Recipe Checks")
33 case RETURN: {
34 break;
35 }
36 :(before "End Primitive Recipe Implementations")
37 case RETURN: {
38
39 if (Trace_stream) {
40 trace(9999, "trace") << current_instruction().name << ": decrementing callstack depth from " << Trace_stream->callstack_depth << end();
41 --Trace_stream->callstack_depth;
42 if (Trace_stream->callstack_depth < 0) {
43 Current_routine->calls.clear();
44 goto stop_running_current_routine;
45 }
46 }
47 Current_routine->calls.pop_front();
48
49 if (Current_routine->calls.empty()) goto stop_running_current_routine;
50 for (int i = 0; i < SIZE(ingredients); ++i)
51 trace(9998, "run") << "result " << i << " is " << to_string(ingredients.at(i)) << end();
52
53 copy(ingredients.begin(), ingredients.end(), inserter(products, products.begin()));
54
55 break;
56 }
57
58
59
60 :(before "End Checks")
61 Transform.push_back(check_types_of_return_instructions);
62 :(code)
63 void check_types_of_return_instructions(const recipe_ordinal r) {
64 const recipe& caller = get(Recipe, r);
65 trace(9991, "transform") << "--- check types of return instructions in recipe " << caller.name << end();
66 for (int i = 0; i < SIZE(caller.steps); ++i) {
67 const instruction& caller_instruction = caller.steps.at(i);
68 if (caller_instruction.is_label) continue;
69 if (caller_instruction.products.empty()) continue;
70 if (caller_instruction.operation < MAX_PRIMITIVE_RECIPES) continue;
71 const recipe& callee = get(Recipe, caller_instruction.operation);
72 for (int i = 0; i < SIZE(callee.steps); ++i) {
73 const instruction& return_inst = callee.steps.at(i);
74 if (return_inst.operation != RETURN) continue;
75
76 if (SIZE(caller_instruction.products) > SIZE(return_inst.ingredients)) {
77 raise << maybe(caller.name) << "too few values returned from " << callee.name << '\n' << end();
78 break;
79 }
80 for (int i = 0; i < SIZE(caller_instruction.products); ++i) {
81 reagent lhs = return_inst.ingredients.at(i);
82 reagent rhs = caller_instruction.products.at(i);
83
84 if (!types_coercible(rhs, lhs)) {
85 raise << maybe(callee.name) << return_inst.name << " ingredient '" << lhs.original_string << "' can't be saved in '" << rhs.original_string << "'\n" << end();
86 raise << " ['" << to_string(lhs.type) << "' vs '" << to_string(rhs.type) << "']\n" << end();
87 goto finish_return_check;
88 }
89 }
90
91
92 for (int i = 0; i < SIZE(caller_instruction.products); ++i) {
93 if (has_property(return_inst.ingredients.at(i), "same-as-ingredient")) {
94 string_tree* tmp = property(return_inst.ingredients.at(i), "same-as-ingredient");
95 if (!tmp || !tmp->atom) {
96 raise << maybe(caller.name) << "'same-as-ingredient' metadata should take exactly one value in '" << to_original_string(return_inst) << "'\n" << end();
97 goto finish_return_check;
98 }
99 int ingredient_index = to_integer(tmp->value);
100 if (ingredient_index >= SIZE(caller_instruction.ingredients)) {
101 raise << maybe(caller.name) << "too few ingredients in '" << to_original_string(caller_instruction) << "'\n" << end();
102 goto finish_return_check;
103 }
104 if (!is_dummy(caller_instruction.products.at(i)) && !is_literal(caller_instruction.ingredients.at(ingredient_index)) && caller_instruction.products.at(i).name != caller_instruction.ingredients.at(ingredient_index).name) {
105 raise << maybe(caller.name) << "'" << to_original_string(caller_instruction) << "' should write to '" << caller_instruction.ingredients.at(ingredient_index).original_string << "' rather than '" << caller_instruction.products.at(i).original_string << "'\n" << end();
106 }
107 }
108 }
109 finish_return_check:;
110 }
111 }
112 }
113
114 :(scenario return_type_mismatch)
115 % Hide_errors = true;
116 def main [
117 3:num <- f 2
118 ]
119 def f [
120 12:num <- next-ingredient
121 13:num <- copy 35
122 14:point <- copy 12:point/raw
123 return 14:point
124 ]
125 +error: f: return ingredient '14:point' can't be saved in '3:num'
126
127
128
129
130
131
132
133
134 :(scenario return_same_as_ingredient)
135 % Hide_errors = true;
136 def main [
137 1:num <- copy 0
138 2:num <- test1 1:num
139 ]
140 def test1 [
141 10:num <- next-ingredient
142 return 10:num/same-as-ingredient:0
143 ]
144 +error: main: '2:num <- test1 1:num' should write to '1:num' rather than '2:num'
145
146 :(scenario return_same_as_ingredient_dummy)
147 def main [
148 1:num <- copy 0
149 _ <- test1 1:num
150 ]
151 def test1 [
152 10:num <- next-ingredient
153 return 10:num/same-as-ingredient:0
154 ]
155 $error: 0
156
157 :(code)
158 string to_string(const vector<double>& in) {
159 if (in.empty()) return "[]";
160 ostringstream out;
161 if (SIZE(in) == 1) {
162 out << no_scientific(in.at(0));
163 return out.str();
164 }
165 out << "[";
166 for (int i = 0; i < SIZE(in); ++i) {
167 if (i > 0) out << ", ";
168 out << no_scientific(in.at(i));
169 }
170 out << "]";
171 return out.str();
172 }