1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
//: Calls can also generate products, using 'reply' or 'return'.
:(scenario return)
def main [
1:num, 2:num <- f 34
]
def f [
12:num <- next-ingredient
13:num <- add 1, 12:num
reply 12:num, 13:num
]
+mem: storing 34 in location 1
+mem: storing 35 in location 2
:(before "End Primitive Recipe Declarations")
RETURN,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "return", RETURN);
put(Recipe_ordinal, "reply", RETURN); // synonym while teaching
:(before "End Primitive Recipe Checks")
case RETURN: {
break; // checks will be performed by a transform below
}
:(before "End Primitive Recipe Implementations")
case RETURN: {
// Starting Reply
if (Trace_stream) {
trace(9999, "trace") << "reply: decrementing callstack depth from " << Trace_stream->callstack_depth << end();
--Trace_stream->callstack_depth;
if (Trace_stream->callstack_depth < 0) {
Current_routine->calls.clear();
goto stop_running_current_routine;
}
}
Current_routine->calls.pop_front();
// just in case 'main' returns a value, drop it for now
if (Current_routine->calls.empty()) goto stop_running_current_routine;
for (int i = 0; i < SIZE(ingredients); ++i)
trace(9998, "run") << "result " << i << " is " << to_string(ingredients.at(i)) << end();
// make reply products available to caller
copy(ingredients.begin(), ingredients.end(), inserter(products, products.begin()));
// End Reply
break; // continue to process rest of *caller* instruction
}
//: Types in reply instructions are checked ahead of time.
:(before "End Checks")
Transform.push_back(check_types_of_reply_instructions);
:(code)
void check_types_of_reply_instructions(recipe_ordinal r) {
const recipe& caller = get(Recipe, r);
trace(9991, "transform") << "--- check types of reply instructions in recipe " << caller.name << end();
for (int i = 0; i < SIZE(caller.steps); ++i) {
const instruction& caller_instruction = caller.steps.at(i);
if (caller_instruction.is_label) continue;
if (caller_instruction.products.empty()) continue;
if (caller_instruction.operation < MAX_PRIMITIVE_RECIPES) continue;
const recipe& callee = get(Recipe, caller_instruction.operation);
for (int i = 0; i < SIZE(callee.steps); ++i) {
const instruction& reply_inst = callee.steps.at(i);
if (reply_inst.operation != RETURN) continue;
// check types with the caller
if (SIZE(caller_instruction.products) > SIZE(reply_inst.ingredients)) {
raise << maybe(caller.name) << "too few values returned from " << callee.name << '\n' << end();
break;
}
for (int i = 0; i < SIZE(caller_instruction.products); ++i) {
reagent/*copy*/ lhs = reply_inst.ingredients.at(i);
reagent/*copy*/ rhs = caller_instruction.products.at(i);
// End Check RETURN Copy(lhs, rhs)
if (!types_coercible(rhs, lhs)) {
raise << maybe(callee.name) << reply_inst.name << " ingredient '" << lhs.original_string << "' can't be saved in '" << rhs.original_string << "'\n" << end();
raise << " ['" << to_string(lhs.type) << "' vs '" << to_string(rhs.type) << "']\n" << end();
goto finish_reply_check;
}
}
// check that any reply ingredients with /same-as-ingredient connect up
// the corresponding ingredient and product in the caller.
for (int i = 0; i < SIZE(caller_instruction.products); ++i) {
if (has_property(reply_inst.ingredients.at(i), "same-as-ingredient")) {
string_tree* tmp = property(reply_inst.ingredients.at(i), "same-as-ingredient");
if (!tmp || !tmp->atom) {
raise << maybe(caller.name) << "'same-as-ingredient' metadata should take exactly one value in '" << to_original_string(reply_inst) << "'\n" << end();
goto finish_reply_check;
}
int ingredient_index = to_integer(tmp->value);
if (ingredient_index >= SIZE(caller_instruction.ingredients)) {
raise << maybe(caller.name) << "too few ingredients in '" << to_original_string(caller_instruction) << "'\n" << end();
goto finish_reply_check;
}
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) {
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();
}
}
}
finish_reply_check:;
}
}
}
:(scenario return_type_mismatch)
% Hide_errors = true;
def main [
3:num <- f 2
]
def f [
12:num <- next-ingredient
13:num <- copy 35
14:point <- copy 12:point/raw
return 14:point
]
+error: f: return ingredient '14:point' can't be saved in '3:num'
//: In mu we'd like to assume that any instruction doesn't modify its
//: ingredients unless they're also products. The /same-as-ingredient inside
//: the recipe's 'reply' will help catch accidental misuse of such
//: 'ingredient-products' (sometimes called in-out parameters in other languages).
:(scenario return_same_as_ingredient)
% Hide_errors = true;
def main [
1:num <- copy 0
2:num <- test1 1:num # call with different ingredient and product
]
def test1 [
10:num <- next-ingredient
return 10:num/same-as-ingredient:0
]
+error: main: '2:num <- test1 1:num' should write to '1:num' rather than '2:num'
:(scenario return_same_as_ingredient_dummy)
def main [
1:num <- copy 0
_ <- test1 1:num # call with different ingredient and product
]
def test1 [
10:num <- next-ingredient
return 10:num/same-as-ingredient:0
]
$error: 0
:(code)
string to_string(const vector<double>& in) {
if (in.empty()) return "[]";
ostringstream out;
if (SIZE(in) == 1) {
out << no_scientific(in.at(0));
return out.str();
}
out << "[";
for (int i = 0; i < SIZE(in); ++i) {
if (i > 0) out << ", ";
out << no_scientific(in.at(i));
}
out << "]";
return out.str();
}
|