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//: Calls can take ingredients just like primitives. To access a recipe's
//: ingredients, use 'next-ingredient'.
:(scenario next_ingredient)
def main [
f 2
]
def f [
12:num <- next-ingredient
13:num <- add 1, 12:num
]
+mem: storing 3 in location 13
:(scenario next_ingredient_missing)
def main [
f
]
def f [
_, 12:num <- next-ingredient
]
+mem: storing 0 in location 12
:(before "End call Fields")
vector<vector<double> > ingredient_atoms;
vector<reagent> ingredients;
int next_ingredient_to_process;
:(before "End call Constructor")
next_ingredient_to_process = 0;
:(before "End Call Housekeeping")
for (int i = 0; i < SIZE(ingredients); ++i) {
current_call().ingredient_atoms.push_back(ingredients.at(i));
reagent/*copy*/ ingredient = call_instruction.ingredients.at(i);
// End Compute Call Ingredient
current_call().ingredients.push_back(ingredient);
// End Populate Call Ingredient
}
:(before "End Primitive Recipe Declarations")
NEXT_INGREDIENT,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "next-ingredient", NEXT_INGREDIENT);
:(before "End Primitive Recipe Checks")
case NEXT_INGREDIENT: {
if (!inst.ingredients.empty()) {
raise << maybe(get(Recipe, r).name) << "'next-ingredient' didn't expect any ingredients in '" << inst.original_string << "'\n" << end();
break;
}
break;
}
:(before "End Primitive Recipe Implementations")
case NEXT_INGREDIENT: {
assert(!Current_routine->calls.empty());
if (current_call().next_ingredient_to_process < SIZE(current_call().ingredient_atoms)) {
reagent/*copy*/ product = current_instruction().products.at(0);
// End Preprocess NEXT_INGREDIENT product
if (current_recipe_name() == "main") {
// no ingredient types since the call might be implicit; assume ingredients are always strings
// todo: how to test this?
if (!is_mu_text(product))
raise << "main: wrong type for ingredient '" << product.original_string << "'\n" << end();
}
else if (!types_coercible(product,
current_call().ingredients.at(current_call().next_ingredient_to_process))) {
raise << maybe(current_recipe_name()) << "wrong type for ingredient '" << product.original_string << "'\n" << end();
// End next-ingredient Type Mismatch Error
}
products.push_back(
current_call().ingredient_atoms.at(current_call().next_ingredient_to_process));
assert(SIZE(products) == 1); products.resize(2); // push a new vector
products.at(1).push_back(1);
++current_call().next_ingredient_to_process;
}
else {
if (SIZE(current_instruction().products) < 2)
raise << maybe(current_recipe_name()) << "no ingredient to save in '" << current_instruction().products.at(0).original_string << "'\n" << end();
if (current_instruction().products.empty()) break;
products.resize(2);
// pad the first product with sufficient zeros to match its type
products.at(0).resize(size_of(current_instruction().products.at(0)));
products.at(1).push_back(0);
}
break;
}
:(scenario next_ingredient_fail_on_missing)
% Hide_errors = true;
def main [
f
]
def f [
11:num <- next-ingredient
]
+error: f: no ingredient to save in '11:num'
:(scenario rewind_ingredients)
def main [
f 2
]
def f [
12:num <- next-ingredient # consume ingredient
_, 1:bool <- next-ingredient # will not find any ingredients
rewind-ingredients
13:num, 2:bool <- next-ingredient # will find ingredient again
]
+mem: storing 2 in location 12
+mem: storing 0 in location 1
+mem: storing 2 in location 13
+mem: storing 1 in location 2
:(before "End Primitive Recipe Declarations")
REWIND_INGREDIENTS,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "rewind-ingredients", REWIND_INGREDIENTS);
:(before "End Primitive Recipe Checks")
case REWIND_INGREDIENTS: {
break;
}
:(before "End Primitive Recipe Implementations")
case REWIND_INGREDIENTS: {
current_call().next_ingredient_to_process = 0;
break;
}
:(scenario ingredient)
def main [
f 1, 2
]
def f [
12:num <- ingredient 1 # consume second ingredient first
13:num, 1:bool <- next-ingredient # next-ingredient tries to scan past that
]
+mem: storing 2 in location 12
+mem: storing 0 in location 1
:(before "End Primitive Recipe Declarations")
INGREDIENT,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "ingredient", INGREDIENT);
:(before "End Primitive Recipe Checks")
case INGREDIENT: {
if (SIZE(inst.ingredients) != 1) {
raise << maybe(get(Recipe, r).name) << "'ingredient' expects exactly one ingredient, but got '" << inst.original_string << "'\n" << end();
break;
}
if (!is_literal(inst.ingredients.at(0)) && !is_mu_number(inst.ingredients.at(0))) {
raise << maybe(get(Recipe, r).name) << "'ingredient' expects a literal ingredient, but got '" << inst.ingredients.at(0).original_string << "'\n" << end();
break;
}
break;
}
:(before "End Primitive Recipe Implementations")
case INGREDIENT: {
if (static_cast<int>(ingredients.at(0).at(0)) < SIZE(current_call().ingredient_atoms)) {
current_call().next_ingredient_to_process = ingredients.at(0).at(0);
products.push_back(
current_call().ingredient_atoms.at(current_call().next_ingredient_to_process));
assert(SIZE(products) == 1); products.resize(2); // push a new vector
products.at(1).push_back(1);
++current_call().next_ingredient_to_process;
}
else {
if (SIZE(current_instruction().products) > 1) {
products.resize(2);
products.at(0).push_back(0); // todo: will fail noisily if we try to read a compound value
products.at(1).push_back(0);
}
}
break;
}
//: a particularly common array type is the text, or address:array:character
:(code)
bool is_mu_text(reagent/*copy*/ x) {
// End Preprocess is_mu_text(reagent x)
return x.type
&& !x.type->atom
&& x.type->left->atom
&& x.type->left->value == get(Type_ordinal, "address")
&& x.type->right
&& !x.type->right->atom
&& x.type->right->left->atom
&& x.type->right->left->value == get(Type_ordinal, "array")
&& x.type->right->right
&& !x.type->right->right->atom
&& x.type->right->right->left->value == get(Type_ordinal, "character")
&& x.type->right->right->right == NULL;
}
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