103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
//: Phase 2: Filter loaded recipes through an extensible list of 'transforms'.
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//:
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//: The process of running Mu code:
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//: load -> transform -> run
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//:
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//: The hope is that this framework of transform tools will provide a
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//: deconstructed alternative to conventional compilers.
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//:
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//: We're going to have many transforms in Mu, and getting their order right
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//: (not the same as ordering of layers) is a well-known problem. Some tips:
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//: a) Design each layer to rely on as few previous layers as possible.
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//:
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//: b) When positioning transforms, try to find the tightest constraint in
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//: each transform relative to previous layers.
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//:
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//: c) Even so you'll periodically need to try adjusting each transform
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//: relative to those in previous layers to find a better arrangement.
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:(before "End recipe Fields")
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int transformed_until;
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:(before "End recipe Constructor")
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transformed_until = -1;
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:(before "End Types")
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typedef void (*transform_fn)(const recipe_ordinal);
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:(before "End Globals")
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vector<transform_fn> Transform;
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:(before "End One-time Setup")
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initialize_transforms();
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:(code)
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void initialize_transforms() {
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// Begin Transforms
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// Begin Instruction Inserting/Deleting Transforms
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// End Instruction Inserting/Deleting Transforms
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// Begin Instruction Modifying Transforms
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// End Instruction Modifying Transforms
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// End Transforms
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// Begin Checks
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// End Checks
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}
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void transform_all() {
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trace(100, "transform") << "=== transform_all()" << end();
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// Begin transform_all
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for (int t = 0; t < SIZE(Transform); ++t) {
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for (map<recipe_ordinal, recipe>::iterator p = Recipe.begin(); p != Recipe.end(); ++p) {
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recipe& r = p->second;
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if (r.transformed_until != t-1) continue;
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// End Transform Checks
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(*Transform.at(t))(/*recipe_ordinal*/p->first);
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r.transformed_until = t;
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}
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}
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parse_int_reagents(); // do this after all other transforms have run
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// End transform_all
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}
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//: Even though a run will involve many calls to transform_all() for tests,
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//: our logical model is to load all code, then transform all code, then run.
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//: If you load new code that should cause already-transformed recipes to
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//: change, that's not supported. To help detect such situations and raise
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//: helpful errors we track a count of the number of calls made to
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//: transform_all().
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:(before "End Globals")
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int Num_calls_to_transform_all = 0;
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:(after "void transform_all()")
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++Num_calls_to_transform_all;
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:(code)
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void parse_int_reagents() {
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trace(101, "transform") << "--- parsing any uninitialized reagents as integers" << end();
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for (map<recipe_ordinal, recipe>::iterator p = Recipe.begin(); p != Recipe.end(); ++p) {
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recipe& r = p->second;
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if (r.steps.empty()) continue;
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for (int index = 0; index < SIZE(r.steps); ++index) {
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instruction& inst = r.steps.at(index);
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for (int i = 0; i < SIZE(inst.ingredients); ++i) {
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populate_value(inst.ingredients.at(i));
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}
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for (int i = 0; i < SIZE(inst.products); ++i) {
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populate_value(inst.products.at(i));
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}
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}
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}
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}
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void populate_value(reagent& r) {
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if (r.initialized) return;
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// End Reagent-parsing Exceptions
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if (!is_integer(r.name)) return;
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r.set_value(to_integer(r.name));
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}
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// helper for tests -- temporarily suppress run
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void transform(string form) {
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load(form);
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transform_all();
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}
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