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//: make some recipes more friendly by trying to auto-convert their ingredients to text
void test_rewrite_stashes_to_text() {
transform(
"def main [\n"
" local-scope\n"
" n:num <- copy 34\n"
" stash n\n"
"]\n"
);
CHECK_TRACE_CONTENTS(
"transform: {stash_2_0: (\"address\" \"array\" \"character\")} <- to-text-line {n: \"number\"}\n"
"transform: stash {stash_2_0: (\"address\" \"array\" \"character\")}\n"
);
}
void test_rewrite_traces_to_text() {
transform(
"def main [\n"
" local-scope\n"
" n:num <- copy 34\n"
" trace 2, [app], n\n"
"]\n"
);
CHECK_TRACE_CONTENTS(
"transform: {trace_2_2: (\"address\" \"array\" \"character\")} <- to-text-line {n: \"number\"}\n"
"transform: trace {2: \"literal\"}, {\"app\": \"literal-string\"}, {trace_2_2: (\"address\" \"array\" \"character\")}\n"
);
}
//: special case: rewrite attempts to stash contents of most arrays to avoid
//: passing addresses around
void test_rewrite_stashes_of_arrays() {
transform(
"def main [\n"
" local-scope\n"
" n:&:@:num <- new number:type, 3\n"
" stash *n\n"
"]\n"
);
CHECK_TRACE_CONTENTS(
"transform: {stash_2_0: (\"address\" \"array\" \"character\")} <- array-to-text-line {n: (\"address\" \"array\" \"number\")}\n"
"transform: stash {stash_2_0: (\"address\" \"array\" \"character\")}\n"
);
}
void test_ignore_stashes_of_static_arrays() {
transform(
"def main [\n"
" local-scope\n"
" n:@:num:3 <- create-array\n"
" stash n\n"
"]\n"
);
CHECK_TRACE_CONTENTS(
"transform: stash {n: (\"array\" \"number\" \"3\")}\n"
);
}
void test_rewrite_stashes_of_recipe_header_products() {
transform(
"container foo [\n"
" x:num\n"
"]\n"
"def bar -> x:foo [\n"
" local-scope\n"
" load-ingredients\n"
" x <- merge 34\n"
" stash x\n"
"]\n"
);
CHECK_TRACE_CONTENTS(
"transform: stash {stash_2_0: (\"address\" \"array\" \"character\")}\n"
);
}
//: misplaced; should be in instruction inserting/deleting transforms, but has
//: prerequisites: deduce_types_from_header and check_or_set_types_by_name
:(after "Transform.push_back(deduce_types_from_header)")
Transform.push_back(convert_ingredients_to_text); // idempotent
:(code)
void convert_ingredients_to_text(const recipe_ordinal r) {
recipe& caller = get(Recipe, r);
trace(101, "transform") << "--- convert some ingredients to text in recipe " << caller.name << end();
// in recipes without named locations, 'stash' is still not extensible
if (contains_numeric_locations(caller)) return;
convert_ingredients_to_text(caller);
}
void convert_ingredients_to_text(recipe& caller) {
vector<instruction> new_instructions;
for (int i = 0; i < SIZE(caller.steps); ++i) {
instruction& inst = caller.steps.at(i);
// all these cases are getting hairy. how can we make this extensible?
if (inst.name == "stash") {
for (int j = 0; j < SIZE(inst.ingredients); ++j) {
if (is_literal_text(inst.ingredients.at(j))) continue;
ostringstream ingredient_name;
ingredient_name << "stash_" << i << '_' << j << ":address:array:character";
convert_ingredient_to_text(inst.ingredients.at(j), new_instructions, ingredient_name.str());
}
}
else if (inst.name == "trace") {
for (int j = /*skip*/2; j < SIZE(inst.ingredients); ++j) {
if (is_literal_text(inst.ingredients.at(j))) continue;
ostringstream ingredient_name;
ingredient_name << "trace_" << i << '_' << j << ":address:array:character";
convert_ingredient_to_text(inst.ingredients.at(j), new_instructions, ingredient_name.str());
}
}
else if (inst.name_before_rewrite == "append") {
// override only variants that try to append to a string
// Beware: this hack restricts how much 'append' can be overridden. Any
// new variants that match:
// append _:text, ___
// will never ever get used.
if (is_literal_text(inst.ingredients.at(0)) || is_mu_text(inst.ingredients.at(0))) {
for (int j = /*skip base*/1; j < SIZE(inst.ingredients); ++j) {
ostringstream ingredient_name;
ingredient_name << "append_" << i << '_' << j << ":address:array:character";
convert_ingredient_to_text(inst.ingredients.at(j), new_instructions, ingredient_name.str());
}
}
}
trace(103, "transform") << to_string(inst) << end();
new_instructions.push_back(inst);
}
caller.steps.swap(new_instructions);
}
// add an instruction to convert reagent 'r' to text in list 'out', then
// replace r with converted text
void convert_ingredient_to_text(reagent& r, vector<instruction>& out, const string& tmp_var) {
if (!r.type) return; // error; will be handled elsewhere
if (is_mu_text(r)) return;
// don't try to extend static arrays
if (is_static_array(r)) return;
instruction def;
if (is_lookup_of_address_of_array(r)) {
def.name = "array-to-text-line";
reagent/*copy*/ tmp = r;
drop_one_lookup(tmp);
def.ingredients.push_back(tmp);
}
else {
def.name = "to-text-line";
def.ingredients.push_back(r);
}
def.products.push_back(reagent(tmp_var));
trace(103, "transform") << to_string(def) << end();
out.push_back(def);
r.clear(); // reclaim old memory
r = reagent(tmp_var);
}
bool is_lookup_of_address_of_array(reagent/*copy*/ x) {
if (x.type->atom) return false;
if (x.type->left->name != "address") return false;
if (!canonize_type(x)) return false;
return is_mu_array(x);
}
bool is_static_array(const reagent& x) {
// no canonize_type()
return !x.type->atom && x.type->left->atom && x.type->left->name == "array";
}
//: Supporting 'append' above requires remembering what name an instruction
//: had before any rewrites or transforms.
:(before "End instruction Fields")
string name_before_rewrite;
:(before "End instruction Clear")
name_before_rewrite.clear();
:(before "End next_instruction(curr)")
curr->name_before_rewrite = curr->name;
:(code)
void test_append_other_types_to_text() {
run(
"def main [\n"
" local-scope\n"
" n:num <- copy 11\n"
" c:char <- copy 111/o\n"
" a:text <- append [abc], 10, n, c\n"
" expected:text <- new [abc1011o]\n"
" 10:bool/raw <- equal a, expected\n"
"]\n"
);
}
//: Make sure that the new system is strictly better than just the 'stash'
//: primitive by itself.
void test_rewrite_stash_continues_to_fall_back_to_default_implementation() {
run(
// type without a to-text implementation
"container foo [\n"
" x:num\n"
" y:num\n"
"]\n"
"def main [\n"
" local-scope\n"
" x:foo <- merge 34, 35\n"
" stash x\n"
"]\n"
);
CHECK_TRACE_CONTENTS(
"app: 34 35\n"
);
}
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