diff options
author | Kartik K. Agaram <vc@akkartik.com> | 2016-04-24 00:36:30 -0700 |
---|---|---|
committer | Kartik K. Agaram <vc@akkartik.com> | 2016-04-24 00:36:30 -0700 |
commit | 15936c91a9f8023dc868a021029f84b45aa50176 (patch) | |
tree | 7a08ab9c577b62f74f6a41096a1a1673c1bcaf3f /033exclusive_container.cc | |
parent | c9a5a7badacd8dba9b5d7cf683301c8ead4b1f12 (diff) | |
download | mu-15936c91a9f8023dc868a021029f84b45aa50176.tar.gz |
2863
Finally after much massaging, the 'address' and 'new' layers are adjacent.
Diffstat (limited to '033exclusive_container.cc')
-rw-r--r-- | 033exclusive_container.cc | 414 |
1 files changed, 0 insertions, 414 deletions
diff --git a/033exclusive_container.cc b/033exclusive_container.cc deleted file mode 100644 index 4a7a5e40..00000000 --- a/033exclusive_container.cc +++ /dev/null @@ -1,414 +0,0 @@ -//: Exclusive containers contain exactly one of a fixed number of 'variants' -//: of different types. -//: -//: They also implicitly contain a tag describing precisely which variant is -//: currently stored in them. - -:(before "End Mu Types Initialization") -//: We'll use this container as a running example, with two number elements. -{ -type_ordinal tmp = put(Type_ordinal, "number-or-point", Next_type_ordinal++); -get_or_insert(Type, tmp); // initialize -get(Type, tmp).kind = EXCLUSIVE_CONTAINER; -get(Type, tmp).name = "number-or-point"; -get(Type, tmp).elements.push_back(reagent("i:number")); -get(Type, tmp).elements.push_back(reagent("p:point")); -} - -//: Tests in this layer often explicitly setup memory before reading it as an -//: array. Don't do this in general. I'm tagging exceptions with /raw to -//: avoid errors. -:(scenario copy_exclusive_container) -# Copying exclusive containers copies all their contents and an extra location for the tag. -def main [ - 1:number <- copy 1 # 'point' variant - 2:number <- copy 34 - 3:number <- copy 35 - 4:number-or-point <- copy 1:number-or-point/unsafe -] -+mem: storing 1 in location 4 -+mem: storing 34 in location 5 -+mem: storing 35 in location 6 - -:(before "End size_of(type) Cases") -if (t.kind == EXCLUSIVE_CONTAINER) { - // size of an exclusive container is the size of its largest variant - // (So like containers, it can't contain arrays.) - int result = 0; - for (int i = 0; i < SIZE(t.elements); ++i) { - reagent tmp; - tmp.type = new type_tree(*type); - int size = size_of(variant_type(tmp, i)); - if (size > result) result = size; - } - // ...+1 for its tag. - return result+1; -} - -//:: To access variants of an exclusive container, use 'maybe-convert'. -//: It always returns an address (so that you can modify it) or null (to -//: signal that the conversion failed (because the container contains a -//: different variant). - -//: 'maybe-convert' requires a literal in ingredient 1. We'll use a synonym -//: called 'variant'. -:(before "End Mu Types Initialization") -put(Type_ordinal, "variant", 0); - -:(scenario maybe_convert) -def main [ - 12:number <- copy 1 - 13:number <- copy 35 - 14:number <- copy 36 - 20:point, 22:boolean <- maybe-convert 12:number-or-point/unsafe, 1:variant -] -# point -+mem: storing 35 in location 20 -+mem: storing 36 in location 21 -# boolean -+mem: storing 1 in location 22 - -:(scenario maybe_convert_fail) -def main [ - 12:number <- copy 1 - 13:number <- copy 35 - 14:number <- copy 36 - 20:number, 21:boolean <- maybe-convert 12:number-or-point/unsafe, 0:variant -] -# number: no write -# boolean -+mem: storing 0 in location 21 - -:(before "End Primitive Recipe Declarations") -MAYBE_CONVERT, -:(before "End Primitive Recipe Numbers") -put(Recipe_ordinal, "maybe-convert", MAYBE_CONVERT); -:(before "End Primitive Recipe Checks") -case MAYBE_CONVERT: { - const recipe& caller = get(Recipe, r); - if (SIZE(inst.ingredients) != 2) { - raise << maybe(caller.name) << "'maybe-convert' expects exactly 2 ingredients in '" << to_original_string(inst) << "'\n" << end(); - break; - } - reagent base = inst.ingredients.at(0); - canonize_type(base); - if (!base.type || !base.type->value || get(Type, base.type->value).kind != EXCLUSIVE_CONTAINER) { - raise << maybe(caller.name) << "first ingredient of 'maybe-convert' should be an exclusive-container, but got " << base.original_string << '\n' << end(); - break; - } - if (!is_literal(inst.ingredients.at(1))) { - raise << maybe(caller.name) << "second ingredient of 'maybe-convert' should have type 'variant', but got " << inst.ingredients.at(1).original_string << '\n' << end(); - break; - } - if (inst.products.empty()) break; - if (SIZE(inst.products) != 2) { - raise << maybe(caller.name) << "'maybe-convert' expects exactly 2 products in '" << to_original_string(inst) << "'\n" << end(); - break; - } - reagent product = inst.products.at(0); - if (!canonize_type(product)) break; - reagent& offset = inst.ingredients.at(1); - populate_value(offset); - if (offset.value >= SIZE(get(Type, base.type->value).elements)) { - raise << maybe(caller.name) << "invalid tag " << offset.value << " in '" << to_original_string(inst) << '\n' << end(); - break; - } - reagent variant = variant_type(base, offset.value); - if (!types_coercible(product, variant)) { - raise << maybe(caller.name) << "'maybe-convert " << base.original_string << ", " << inst.ingredients.at(1).original_string << "' should write to " << to_string(variant.type) << " but " << product.name << " has type " << to_string(product.type) << '\n' << end(); - break; - } - if (!is_mu_boolean(inst.products.at(1))) { - raise << maybe(get(Recipe, r).name) << "second product yielded by 'maybe-convert' should be a boolean, but tried to write to " << inst.products.at(1).original_string << '\n' << end(); - break; - } - break; -} -:(before "End Primitive Recipe Implementations") -case MAYBE_CONVERT: { - reagent base = current_instruction().ingredients.at(0); - canonize(base); - int base_address = base.value; - if (base_address == 0) { - raise << maybe(current_recipe_name()) << "tried to access location 0 in '" << to_original_string(current_instruction()) << "'\n" << end(); - break; - } - int tag = current_instruction().ingredients.at(1).value; - reagent product = current_instruction().products.at(0); - canonize(product); - reagent did_conversion_happen = current_instruction().products.at(1); - canonize(did_conversion_happen); - // optimization: directly write results to only update first product when necessary - if (tag == static_cast<int>(get_or_insert(Memory, base_address))) { - const reagent variant = variant_type(base, tag); - for (int i = 0; i < size_of(variant); ++i) { - double val = get_or_insert(Memory, base_address+1+i); - trace(9999, "mem") << "storing " << no_scientific(val) << " in location " << product.value+i << end(); - put(Memory, product.value+i, val); - } - trace(9999, "mem") << "storing 1 in location " << did_conversion_happen.value << end(); - put(Memory, did_conversion_happen.value, 1); - } - else { - trace(9999, "mem") << "storing 0 in location " << did_conversion_happen.value << end(); - put(Memory, did_conversion_happen.value, 0); - } - goto finish_instruction; -} - -:(code) -const reagent variant_type(const reagent& canonized_base, int tag) { - assert(tag >= 0); - assert(contains_key(Type, canonized_base.type->value)); - assert(!get(Type, canonized_base.type->value).name.empty()); - const type_info& info = get(Type, canonized_base.type->value); - assert(info.kind == EXCLUSIVE_CONTAINER); - reagent element = info.elements.at(tag); - // End variant_type Special-cases - return element; -} - -:(scenario maybe_convert_product_type_mismatch) -% Hide_errors = true; -def main [ - 12:number <- copy 1 - 13:number <- copy 35 - 14:number <- copy 36 - 20:number, 21:boolean <- maybe-convert 12:number-or-point/unsafe, 1:variant -] -+error: main: 'maybe-convert 12:number-or-point/unsafe, 1:variant' should write to point but 20 has type number - -//:: Allow exclusive containers to be defined in mu code. - -:(scenario exclusive_container) -exclusive-container foo [ - x:number - y:number -] -+parse: --- defining exclusive-container foo -+parse: element: {x: "number"} -+parse: element: {y: "number"} - -:(before "End Command Handlers") -else if (command == "exclusive-container") { - insert_container(command, EXCLUSIVE_CONTAINER, in); -} - -//: arrays are disallowed inside exclusive containers unless their length is -//: fixed in advance - -:(scenario exclusive_container_contains_array) -exclusive-container foo [ - x:array:number:3 -] -$error: 0 - -:(scenario exclusive_container_disallows_dynamic_array_element) -% Hide_errors = true; -exclusive-container foo [ - x:array:number -] -+error: container 'foo' cannot determine size of element x - -//:: To construct exclusive containers out of variant types, use 'merge'. -:(scenario lift_to_exclusive_container) -exclusive-container foo [ - x:number - y:number -] - -def main [ - 1:number <- copy 34 - 2:foo <- merge 0/x, 1:number # tag must be a literal when merging exclusive containers - 4:foo <- merge 1/y, 1:number -] -+mem: storing 0 in location 2 -+mem: storing 34 in location 3 -+mem: storing 1 in location 4 -+mem: storing 34 in location 5 - -//: type-checking for 'merge' on exclusive containers - -:(scenario merge_handles_exclusive_container) -exclusive-container foo [ - x:number - y:bar -] -container bar [ - z:number -] -def main [ - 1:foo <- merge 0/x, 34 -] -+mem: storing 0 in location 1 -+mem: storing 34 in location 2 -$error: 0 - -:(scenario merge_requires_literal_tag_for_exclusive_container) -% Hide_errors = true; -exclusive-container foo [ - x:number - y:bar -] -container bar [ - z:number -] -def main [ - local-scope - 1:number <- copy 0 - 2:foo <- merge 1:number, 34 -] -+error: main: ingredient 0 of 'merge' should be a literal, for the tag of exclusive-container foo - -:(before "End valid_merge Cases") -case EXCLUSIVE_CONTAINER: { - assert(state.data.top().container_element_index == 0); - trace(9999, "transform") << "checking exclusive container " << to_string(container) << " vs ingredient " << ingredient_index << end(); - if (!is_literal(ingredients.at(ingredient_index))) { - raise << maybe(caller.name) << "ingredient " << ingredient_index << " of 'merge' should be a literal, for the tag of exclusive-container " << container_info.name << '\n' << end(); - return; - } - reagent ingredient = ingredients.at(ingredient_index); // unnecessary copy just to keep this function from modifying caller - populate_value(ingredient); - if (ingredient.value >= SIZE(container_info.elements)) { - raise << maybe(caller.name) << "invalid tag at " << ingredient_index << " for " << container_info.name << " in '" << to_original_string(inst) << '\n' << end(); - return; - } - reagent variant = variant_type(container, ingredient.value); - trace(9999, "transform") << "tag: " << ingredient.value << end(); - // replace union with its variant - state.data.pop(); - state.data.push(merge_check_point(variant, 0)); - ++ingredient_index; - break; -} - -:(scenario merge_check_container_containing_exclusive_container) -container foo [ - x:number - y:bar -] -exclusive-container bar [ - x:number - y:number -] -def main [ - 1:foo <- merge 23, 1/y, 34 -] -+mem: storing 23 in location 1 -+mem: storing 1 in location 2 -+mem: storing 34 in location 3 -$error: 0 - -:(scenario merge_check_container_containing_exclusive_container_2) -% Hide_errors = true; -container foo [ - x:number - y:bar -] -exclusive-container bar [ - x:number - y:number -] -def main [ - 1:foo <- merge 23, 1/y, 34, 35 -] -+error: main: too many ingredients in '1:foo <- merge 23, 1/y, 34, 35' - -:(scenario merge_check_exclusive_container_containing_container) -exclusive-container foo [ - x:number - y:bar -] -container bar [ - x:number - y:number -] -def main [ - 1:foo <- merge 1/y, 23, 34 -] -+mem: storing 1 in location 1 -+mem: storing 23 in location 2 -+mem: storing 34 in location 3 -$error: 0 - -:(scenario merge_check_exclusive_container_containing_container_2) -exclusive-container foo [ - x:number - y:bar -] -container bar [ - x:number - y:number -] -def main [ - 1:foo <- merge 0/x, 23 -] -$error: 0 - -:(scenario merge_check_exclusive_container_containing_container_3) -% Hide_errors = true; -exclusive-container foo [ - x:number - y:bar -] -container bar [ - x:number - y:number -] -def main [ - 1:foo <- merge 1/y, 23 -] -+error: main: too few ingredients in '1:foo <- merge 1/y, 23' - -:(scenario merge_check_exclusive_container_containing_container_4) -exclusive-container foo [ - x:number - y:bar -] -container bar [ - a:number - b:number -] -def main [ - 1:bar <- merge 23, 24 - 3:foo <- merge 1/y, 1:bar -] -$error: 0 - -//: Since the different variants of an exclusive-container might have -//: different sizes, relax the size mismatch check for 'merge' instructions. -:(before "End size_mismatch(x) Cases") -if (current_step_index() < SIZE(Current_routine->steps()) - && current_instruction().operation == MERGE - && !current_instruction().products.empty() - && current_instruction().products.at(0).type) { - reagent x = current_instruction().products.at(0); - canonize(x); - if (get(Type, x.type->value).kind == EXCLUSIVE_CONTAINER) - return size_of(x) < SIZE(data); -} - -:(scenario merge_exclusive_container_with_mismatched_sizes) -container foo [ - x:number - y:number -] - -exclusive-container bar [ - x:number - y:foo -] - -def main [ - 1:number <- copy 34 - 2:number <- copy 35 - 3:bar <- merge 0/x, 1:number - 6:bar <- merge 1/foo, 1:number, 2:number -] -+mem: storing 0 in location 3 -+mem: storing 34 in location 4 -# bar is always 3 large so location 5 is skipped -+mem: storing 1 in location 6 -+mem: storing 34 in location 7 -+mem: storing 35 in location 8 |