643 lines
21 KiB
C++
643 lines
21 KiB
C++
//: Advanced notation for the common/easy case where a recipe takes some fixed
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//: number of ingredients and yields some fixed number of products.
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:(scenario recipe_with_header)
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def main [
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1:num/raw <- add2 3, 5
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]
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def add2 x:num, y:num -> z:num [
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local-scope
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load-ingredients
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z:num <- add x, y
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return z
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]
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+mem: storing 8 in location 1
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//: When loading recipes save any header.
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:(before "End recipe Fields")
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bool has_header;
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vector<reagent> ingredients;
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vector<reagent> products;
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:(before "End recipe Constructor")
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has_header = false;
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:(before "End Recipe Refinements")
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if (in.peek() != '[') {
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trace("parse") << "recipe has a header; parsing" << end();
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load_recipe_header(in, result);
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}
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:(code)
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void load_recipe_header(istream& in, recipe& result) {
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result.has_header = true;
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while (has_data(in) && in.peek() != '[' && in.peek() != '\n') {
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string s = next_word(in);
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if (s.empty()) {
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assert(!has_data(in));
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raise << "incomplete recipe header at end of file (0)\n" << end();
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return;
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}
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if (s == "<-")
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raise << "recipe " << result.name << " should say '->' and not '<-'\n" << end();
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if (s == "->") break;
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result.ingredients.push_back(reagent(s));
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trace("parse") << "header ingredient: " << result.ingredients.back().original_string << end();
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skip_whitespace_but_not_newline(in);
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}
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while (has_data(in) && in.peek() != '[' && in.peek() != '\n') {
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string s = next_word(in);
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if (s.empty()) {
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assert(!has_data(in));
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raise << "incomplete recipe header at end of file (1)\n" << end();
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return;
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}
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result.products.push_back(reagent(s));
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trace("parse") << "header product: " << result.products.back().original_string << end();
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skip_whitespace_but_not_newline(in);
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}
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// End Load Recipe Header(result)
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}
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:(scenario recipe_handles_stray_comma)
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def main [
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1:num/raw <- add2 3, 5
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]
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def add2 x:num, y:num -> z:num, [
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local-scope
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load-ingredients
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z:num <- add x, y
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return z
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]
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+mem: storing 8 in location 1
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:(scenario recipe_handles_stray_comma_2)
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def main [
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foo
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]
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def foo, [
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1:num/raw <- add 2, 2
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]
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def bar [
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1:num/raw <- add 2, 3
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]
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+mem: storing 4 in location 1
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:(scenario recipe_handles_wrong_arrow)
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% Hide_errors = true;
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def foo a:num <- b:num [
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]
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+error: recipe foo should say '->' and not '<-'
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:(scenario recipe_handles_missing_bracket)
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% Hide_errors = true;
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def main
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]
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+error: main: recipe body must begin with '['
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:(scenario recipe_handles_missing_bracket_2)
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% Hide_errors = true;
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def main
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local-scope
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{
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}
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]
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# doesn't overflow line when reading header
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-parse: header ingredient: local-scope
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+error: main: recipe body must begin with '['
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:(scenario recipe_handles_missing_bracket_3)
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% Hide_errors = true;
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def main # comment
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local-scope
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{
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}
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]
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# doesn't overflow line when reading header
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-parse: header ingredient: local-scope
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+error: main: recipe body must begin with '['
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:(after "Begin debug_string(recipe x)")
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out << "ingredients:\n";
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for (int i = 0; i < SIZE(x.ingredients); ++i)
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out << " " << debug_string(x.ingredients.at(i)) << '\n';
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out << "products:\n";
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for (int i = 0; i < SIZE(x.products); ++i)
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out << " " << debug_string(x.products.at(i)) << '\n';
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//: If a recipe never mentions any ingredients or products, assume it has a header.
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:(scenario recipe_without_ingredients_or_products_has_header)
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def test [
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1:num <- copy 34
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]
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+parse: recipe test has a header
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:(before "End Recipe Body(result)")
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if (!result.has_header) {
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result.has_header = true;
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for (int i = 0; i < SIZE(result.steps); ++i) {
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const instruction& inst = result.steps.at(i);
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if ((inst.name == "reply" && !inst.ingredients.empty())
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|| (inst.name == "return" && !inst.ingredients.empty())
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|| inst.name == "next-ingredient"
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|| inst.name == "ingredient"
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|| inst.name == "rewind-ingredients") {
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result.has_header = false;
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break;
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}
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}
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}
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if (result.has_header) {
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trace("parse") << "recipe " << result.name << " has a header" << end();
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}
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//: Support type abbreviations in headers.
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:(scenario type_abbreviations_in_recipe_headers)
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def main [
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local-scope
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a:text <- foo
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1:char/raw <- index *a, 0
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]
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def foo -> a:text [ # 'text' is an abbreviation
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local-scope
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load-ingredients
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a <- new [abc]
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]
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+mem: storing 97 in location 1
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:(before "End Expand Type Abbreviations(caller)")
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for (long int i = 0; i < SIZE(caller.ingredients); ++i)
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expand_type_abbreviations(caller.ingredients.at(i).type);
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for (long int i = 0; i < SIZE(caller.products); ++i)
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expand_type_abbreviations(caller.products.at(i).type);
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//: Rewrite 'load-ingredients' to instructions to create all reagents in the header.
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:(before "End Rewrite Instruction(curr, recipe result)")
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if (curr.name == "load-ingredients" || curr.name == "load-inputs") {
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curr.clear();
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recipe_ordinal op = get(Recipe_ordinal, "next-ingredient-without-typechecking");
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for (int i = 0; i < SIZE(result.ingredients); ++i) {
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curr.operation = op;
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curr.name = "next-ingredient-without-typechecking";
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curr.products.push_back(result.ingredients.at(i));
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result.steps.push_back(curr);
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curr.clear();
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}
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}
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if (curr.name == "next-ingredient-without-typechecking") {
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raise << maybe(result.name) << "never call 'next-ingredient-without-typechecking' directly\n" << end();
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curr.clear();
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}
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//: internal version of next-ingredient; don't call this directly
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:(before "End Primitive Recipe Declarations")
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NEXT_INGREDIENT_WITHOUT_TYPECHECKING,
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:(before "End Primitive Recipe Numbers")
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put(Recipe_ordinal, "next-ingredient-without-typechecking", NEXT_INGREDIENT_WITHOUT_TYPECHECKING);
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:(before "End Primitive Recipe Checks")
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case NEXT_INGREDIENT_WITHOUT_TYPECHECKING: {
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break;
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}
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:(before "End Primitive Recipe Implementations")
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case NEXT_INGREDIENT_WITHOUT_TYPECHECKING: {
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assert(!Current_routine->calls.empty());
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if (current_call().next_ingredient_to_process < SIZE(current_call().ingredient_atoms)) {
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products.push_back(
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current_call().ingredient_atoms.at(current_call().next_ingredient_to_process));
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assert(SIZE(products) == 1); products.resize(2); // push a new vector
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products.at(1).push_back(1);
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++current_call().next_ingredient_to_process;
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}
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else {
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products.resize(2);
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// pad the first product with sufficient zeros to match its type
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products.at(0).resize(size_of(current_instruction().products.at(0)));
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products.at(1).push_back(0);
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}
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break;
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}
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//: more useful error messages if someone forgets 'load-ingredients'
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:(scenario load_ingredients_missing_error)
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% Hide_errors = true;
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def foo a:num [
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local-scope
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b:num <- add a:num, 1
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]
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+error: foo: tried to read ingredient 'a' in 'b:num <- add a:num, 1' but it hasn't been written to yet
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+error: did you forget 'load-ingredients'?
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:(after "use-before-set Error")
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if (is_present_in_ingredients(caller, ingredient.name))
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raise << " did you forget 'load-ingredients'?\n" << end();
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:(scenario load_ingredients_missing_error_2)
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% Hide_errors = true;
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def foo a:num [
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local-scope
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b:num <- add a, 1
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]
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+error: foo: missing type for 'a' in 'b:num <- add a, 1'
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+error: did you forget 'load-ingredients'?
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:(after "missing-type Error 1")
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if (is_present_in_ingredients(get(Recipe, get(Recipe_ordinal, recipe_name)), x.name))
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raise << " did you forget 'load-ingredients'?\n" << end();
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:(code)
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bool is_present_in_ingredients(const recipe& callee, const string& ingredient_name) {
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for (int i = 0; i < SIZE(callee.ingredients); ++i) {
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if (callee.ingredients.at(i).name == ingredient_name)
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return true;
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}
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return false;
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}
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//:: Check all calls against headers.
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:(scenario show_clear_error_on_bad_call)
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% Hide_errors = true;
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def main [
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1:num <- foo 34
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]
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def foo x:point -> y:num [
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local-scope
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load-ingredients
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return 35
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]
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+error: main: ingredient 0 has the wrong type at '1:num <- foo 34'
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:(scenario show_clear_error_on_bad_call_2)
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% Hide_errors = true;
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def main [
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1:point <- foo 34
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]
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def foo x:num -> y:num [
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local-scope
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load-ingredients
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return x
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]
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+error: main: product 0 has the wrong type at '1:point <- foo 34'
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:(after "Transform.push_back(check_instruction)")
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Transform.push_back(check_calls_against_header); // idempotent
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:(code)
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void check_calls_against_header(const recipe_ordinal r) {
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const recipe& caller = get(Recipe, r);
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trace(9991, "transform") << "--- type-check calls inside recipe " << caller.name << end();
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for (int i = 0; i < SIZE(caller.steps); ++i) {
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const instruction& inst = caller.steps.at(i);
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if (is_primitive(inst.operation)) continue;
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const recipe& callee = get(Recipe, inst.operation);
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if (!callee.has_header) continue;
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for (long int i = 0; i < min(SIZE(inst.ingredients), SIZE(callee.ingredients)); ++i) {
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// ingredients coerced from call to callee
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if (!types_coercible(callee.ingredients.at(i), inst.ingredients.at(i))) {
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raise << maybe(caller.name) << "ingredient " << i << " has the wrong type at '" << to_original_string(inst) << "'\n" << end();
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raise << " ['" << to_string(callee.ingredients.at(i).type) << "' vs '" << to_string(inst.ingredients.at(i).type) << "']\n" << end();
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}
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}
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for (long int i = 0; i < min(SIZE(inst.products), SIZE(callee.products)); ++i) {
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if (is_dummy(inst.products.at(i))) continue;
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// products coerced from callee to call
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if (!types_coercible(inst.products.at(i), callee.products.at(i))) {
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raise << maybe(caller.name) << "product " << i << " has the wrong type at '" << to_original_string(inst) << "'\n" << end();
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raise << " ['" << to_string(inst.products.at(i).type) << "' vs '" << to_string(callee.products.at(i).type) << "']\n" << end();
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}
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}
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}
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}
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//:: Check types going in and out of all recipes with headers.
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:(scenarios transform)
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:(scenario recipe_headers_are_checked)
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% Hide_errors = true;
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def add2 x:num, y:num -> z:num [
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local-scope
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load-ingredients
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z:&:num <- copy 0/unsafe
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return z
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]
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+error: add2: replied with the wrong type at 'return z'
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:(before "End Checks")
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Transform.push_back(check_return_instructions_against_header); // idempotent
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:(code)
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void check_return_instructions_against_header(const recipe_ordinal r) {
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const recipe& caller_recipe = get(Recipe, r);
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if (!caller_recipe.has_header) return;
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trace(9991, "transform") << "--- checking return instructions against header for " << caller_recipe.name << end();
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for (int i = 0; i < SIZE(caller_recipe.steps); ++i) {
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const instruction& inst = caller_recipe.steps.at(i);
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if (inst.name != "reply" && inst.name != "return") continue;
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if (SIZE(caller_recipe.products) != SIZE(inst.ingredients)) {
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raise << maybe(caller_recipe.name) << "replied with the wrong number of products at '" << to_original_string(inst) << "'\n" << end();
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continue;
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}
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for (int i = 0; i < SIZE(caller_recipe.products); ++i) {
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if (!types_match(caller_recipe.products.at(i), inst.ingredients.at(i)))
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raise << maybe(caller_recipe.name) << "replied with the wrong type at '" << to_original_string(inst) << "'\n" << end();
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}
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}
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}
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:(scenario recipe_headers_are_checked_2)
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% Hide_errors = true;
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def add2 x:num, y:num [
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local-scope
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load-ingredients
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z:&:num <- copy 0/unsafe
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return z
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]
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+error: add2: replied with the wrong number of products at 'return z'
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:(scenario recipe_headers_are_checked_against_pre_transformed_instructions)
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% Hide_errors = true;
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def foo -> x:num [
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local-scope
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x:num <- copy 0
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z:bool <- copy false
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return-if z, z
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]
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+error: foo: replied with the wrong type at 'return-if z, z'
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:(scenario recipe_headers_check_for_duplicate_names)
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% Hide_errors = true;
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def foo x:num, x:num -> z:num [
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local-scope
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load-ingredients
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return z
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]
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+error: foo: 'x' can't repeat in the ingredients
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:(scenario recipe_headers_check_for_duplicate_names_2)
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% Hide_errors = true;
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def foo x:num, x:num [ # no result
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local-scope
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load-ingredients
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]
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+error: foo: 'x' can't repeat in the ingredients
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:(scenario recipe_headers_check_for_missing_types)
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% Hide_errors = true;
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def main [
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foo 0
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]
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def foo a [ # no type for 'a'
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]
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+error: foo: ingredient 'a' has no type
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:(before "End recipe Fields")
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map<string, int> ingredient_index;
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:(after "Begin Instruction Modifying Transforms")
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Transform.push_back(check_header_ingredients); // idempotent
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:(code)
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void check_header_ingredients(const recipe_ordinal r) {
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recipe& caller_recipe = get(Recipe, r);
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caller_recipe.ingredient_index.clear();
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trace(9991, "transform") << "--- checking return instructions against header for " << caller_recipe.name << end();
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for (int i = 0; i < SIZE(caller_recipe.ingredients); ++i) {
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if (caller_recipe.ingredients.at(i).type == NULL)
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raise << maybe(caller_recipe.name) << "ingredient '" << caller_recipe.ingredients.at(i).name << "' has no type\n" << end();
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if (contains_key(caller_recipe.ingredient_index, caller_recipe.ingredients.at(i).name))
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raise << maybe(caller_recipe.name) << "'" << caller_recipe.ingredients.at(i).name << "' can't repeat in the ingredients\n" << end();
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put(caller_recipe.ingredient_index, caller_recipe.ingredients.at(i).name, i);
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}
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}
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//: Deduce types from the header if possible.
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:(scenarios run)
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:(scenario deduce_instruction_types_from_recipe_header)
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def main [
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1:num/raw <- add2 3, 5
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]
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def add2 x:num, y:num -> z:num [
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local-scope
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load-ingredients
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z <- add x, y # no type for z
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return z
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]
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+mem: storing 8 in location 1
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:(after "Begin Type Modifying Transforms")
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Transform.push_back(deduce_types_from_header); // idempotent
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:(code)
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void deduce_types_from_header(const recipe_ordinal r) {
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recipe& caller_recipe = get(Recipe, r);
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if (caller_recipe.products.empty()) return;
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trace(9991, "transform") << "--- deduce types from header for " << caller_recipe.name << end();
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map<string, const type_tree*> header_type;
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for (int i = 0; i < SIZE(caller_recipe.ingredients); ++i) {
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if (!caller_recipe.ingredients.at(i).type) continue; // error handled elsewhere
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put(header_type, caller_recipe.ingredients.at(i).name, caller_recipe.ingredients.at(i).type);
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trace(9993, "transform") << "type of " << caller_recipe.ingredients.at(i).name << " is " << names_to_string(caller_recipe.ingredients.at(i).type) << end();
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}
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for (int i = 0; i < SIZE(caller_recipe.products); ++i) {
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if (!caller_recipe.products.at(i).type) continue; // error handled elsewhere
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put(header_type, caller_recipe.products.at(i).name, caller_recipe.products.at(i).type);
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trace(9993, "transform") << "type of " << caller_recipe.products.at(i).name << " is " << names_to_string(caller_recipe.products.at(i).type) << end();
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}
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for (int i = 0; i < SIZE(caller_recipe.steps); ++i) {
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instruction& inst = caller_recipe.steps.at(i);
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trace(9992, "transform") << "instruction: " << to_string(inst) << end();
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for (int i = 0; i < SIZE(inst.ingredients); ++i) {
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if (inst.ingredients.at(i).type) continue;
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if (header_type.find(inst.ingredients.at(i).name) == header_type.end())
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continue;
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if (!contains_key(header_type, inst.ingredients.at(i).name)) continue; // error handled elsewhere
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inst.ingredients.at(i).type = new type_tree(*get(header_type, inst.ingredients.at(i).name));
|
|
trace(9993, "transform") << "type of " << inst.ingredients.at(i).name << " is " << names_to_string(inst.ingredients.at(i).type) << end();
|
|
}
|
|
for (int i = 0; i < SIZE(inst.products); ++i) {
|
|
trace(9993, "transform") << " product: " << to_string(inst.products.at(i)) << end();
|
|
if (inst.products.at(i).type) continue;
|
|
if (header_type.find(inst.products.at(i).name) == header_type.end())
|
|
continue;
|
|
if (!contains_key(header_type, inst.products.at(i).name)) continue; // error handled elsewhere
|
|
inst.products.at(i).type = new type_tree(*get(header_type, inst.products.at(i).name));
|
|
trace(9993, "transform") << "type of " << inst.products.at(i).name << " is " << names_to_string(inst.products.at(i).type) << end();
|
|
}
|
|
}
|
|
}
|
|
|
|
//: One final convenience: no need to say what to return if the information is
|
|
//: in the header.
|
|
|
|
:(scenario return_based_on_header)
|
|
def main [
|
|
1:num/raw <- add2 3, 5
|
|
]
|
|
def add2 x:num, y:num -> z:num [
|
|
local-scope
|
|
load-ingredients
|
|
z <- add x, y
|
|
return
|
|
]
|
|
+mem: storing 8 in location 1
|
|
|
|
:(after "Transform.push_back(check_header_ingredients)")
|
|
Transform.push_back(fill_in_return_ingredients); // idempotent
|
|
|
|
:(code)
|
|
void fill_in_return_ingredients(const recipe_ordinal r) {
|
|
recipe& caller_recipe = get(Recipe, r);
|
|
trace(9991, "transform") << "--- fill in return ingredients from header for recipe " << caller_recipe.name << end();
|
|
if (!caller_recipe.has_header) return;
|
|
for (int i = 0; i < SIZE(caller_recipe.steps); ++i) {
|
|
instruction& inst = caller_recipe.steps.at(i);
|
|
if (inst.name == "reply" || inst.name == "return")
|
|
add_header_products(inst, caller_recipe);
|
|
}
|
|
// fall through return
|
|
if (!caller_recipe.steps.empty()) {
|
|
const instruction& final_instruction = caller_recipe.steps.at(SIZE(caller_recipe.steps)-1);
|
|
if (final_instruction.name == "reply" || final_instruction.name == "return")
|
|
return;
|
|
}
|
|
instruction inst;
|
|
inst.name = "return";
|
|
add_header_products(inst, caller_recipe);
|
|
caller_recipe.steps.push_back(inst);
|
|
}
|
|
|
|
void add_header_products(instruction& inst, const recipe& caller_recipe) {
|
|
assert(inst.name == "reply" || inst.name == "return");
|
|
// collect any products with the same names as ingredients
|
|
for (int i = 0; i < SIZE(caller_recipe.products); ++i) {
|
|
// if the ingredient is missing, add it from the header
|
|
if (SIZE(inst.ingredients) == i)
|
|
inst.ingredients.push_back(caller_recipe.products.at(i));
|
|
// if it's missing /same_as_ingredient, try to fill it in
|
|
if (contains_key(caller_recipe.ingredient_index, caller_recipe.products.at(i).name) && !has_property(inst.ingredients.at(i), "same_as_ingredient")) {
|
|
ostringstream same_as_ingredient;
|
|
same_as_ingredient << get(caller_recipe.ingredient_index, caller_recipe.products.at(i).name);
|
|
inst.ingredients.at(i).properties.push_back(pair<string, string_tree*>("same-as-ingredient", new string_tree(same_as_ingredient.str())));
|
|
}
|
|
}
|
|
}
|
|
|
|
:(scenario explicit_return_ignores_header)
|
|
def main [
|
|
1:num/raw, 2:num/raw <- add2 3, 5
|
|
]
|
|
def add2 a:num, b:num -> y:num, z:num [
|
|
local-scope
|
|
load-ingredients
|
|
y <- add a, b
|
|
z <- subtract a, b
|
|
return a, z
|
|
]
|
|
+mem: storing 3 in location 1
|
|
+mem: storing -2 in location 2
|
|
|
|
:(scenario return_on_fallthrough_based_on_header)
|
|
def main [
|
|
1:num/raw <- add2 3, 5
|
|
]
|
|
def add2 x:num, y:num -> z:num [
|
|
local-scope
|
|
load-ingredients
|
|
z <- add x, y
|
|
]
|
|
+transform: instruction: return {z: "number"}
|
|
+mem: storing 8 in location 1
|
|
|
|
:(scenario return_on_fallthrough_already_exists)
|
|
def main [
|
|
1:num/raw <- add2 3, 5
|
|
]
|
|
def add2 x:num, y:num -> z:num [
|
|
local-scope
|
|
load-ingredients
|
|
z <- add x, y # no type for z
|
|
return z
|
|
]
|
|
+transform: instruction: return {z: ()}
|
|
-transform: instruction: return z:num
|
|
+mem: storing 8 in location 1
|
|
|
|
:(scenario return_causes_error_in_empty_recipe)
|
|
% Hide_errors = true;
|
|
def foo -> x:num [
|
|
]
|
|
+error: foo: tried to read ingredient 'x' in 'return x:num' but it hasn't been written to yet
|
|
|
|
:(scenario return_after_conditional_return_based_on_header)
|
|
def main [
|
|
1:num/raw <- add2 3, 5
|
|
]
|
|
def add2 x:num, y:num -> z:num [
|
|
local-scope
|
|
load-ingredients
|
|
z <- add x, y # no type for z
|
|
return-if false, 34
|
|
]
|
|
+mem: storing 8 in location 1
|
|
|
|
:(scenario recipe_headers_perform_same_ingredient_check)
|
|
% Hide_errors = true;
|
|
def main [
|
|
1:num <- copy 34
|
|
2:num <- copy 34
|
|
3:num <- add2 1:num, 2:num
|
|
]
|
|
def add2 x:num, y:num -> x:num [
|
|
local-scope
|
|
load-ingredients
|
|
]
|
|
+error: main: '3:num <- add2 1:num, 2:num' should write to '1:num' rather than '3:num'
|
|
|
|
//: One special-case is recipe 'main'. Make sure it's only ever taking in text
|
|
//: ingredients, and returning a single number.
|
|
|
|
:(scenario recipe_header_ingredients_constrained_for_main)
|
|
% Hide_errors = true;
|
|
def main x:num [
|
|
]
|
|
+error: ingredients of recipe 'main' must all be text (address:array:character)
|
|
|
|
:(scenario recipe_header_products_constrained_for_main)
|
|
% Hide_errors = true;
|
|
def main -> x:text [
|
|
]
|
|
+error: recipe 'main' must return at most a single product, a number
|
|
|
|
:(scenario recipe_header_products_constrained_for_main_2)
|
|
% Hide_errors = true;
|
|
def main -> x:num, y:num [
|
|
]
|
|
+error: recipe 'main' must return at most a single product, a number
|
|
|
|
:(after "Transform.push_back(expand_type_abbreviations)")
|
|
Transform.push_back(check_recipe_header_constraints);
|
|
:(code)
|
|
void check_recipe_header_constraints(const recipe_ordinal r) {
|
|
const recipe& caller = get(Recipe, r);
|
|
if (caller.name != "main") return;
|
|
trace(9992, "transform") << "check recipe header constraints for recipe " << caller.name << end();
|
|
if (!caller.has_header) return;
|
|
reagent/*local*/ expected_ingredient("x:address:array:character");
|
|
for (int i = 0; i < SIZE(caller.ingredients); ++i) {
|
|
if (!types_strictly_match(expected_ingredient, caller.ingredients.at(i))) {
|
|
raise << "ingredients of recipe 'main' must all be text (address:array:character)\n" << end();
|
|
break;
|
|
}
|
|
}
|
|
int nprod = SIZE(caller.products);
|
|
reagent/*local*/ expected_product("x:number");
|
|
if (nprod > 1
|
|
|| (nprod == 1 && !types_strictly_match(expected_product, caller.products.at(0)))) {
|
|
raise << "recipe 'main' must return at most a single product, a number\n" << end();
|
|
}
|
|
}
|