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Merge branch 'master' of https://git.scc.kit.edu/pse-typinferenz/typicalc
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commit
874b648caf
@ -1,9 +1,6 @@
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package edu.kit.typicalc.model;
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import edu.kit.typicalc.model.step.InferenceStep;
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import edu.kit.typicalc.model.step.StepFactory;
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import edu.kit.typicalc.model.step.StepFactoryDefault;
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import edu.kit.typicalc.model.step.StepFactoryWithLet;
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import edu.kit.typicalc.model.step.*;
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import edu.kit.typicalc.model.term.AbsTerm;
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import edu.kit.typicalc.model.term.AppTerm;
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import edu.kit.typicalc.model.term.ConstTerm;
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@ -133,7 +130,43 @@ public class Tree implements TermVisitorTree {
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@Override
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public InferenceStep visit(LetTerm letTerm, Map<VarTerm, TypeAbstraction> typeAssumptions, Type conclusionType) {
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return null; // TODO
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TypeInfererLet typeInfererLet = new TypeInfererLet(
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letTerm.getVariableDefinition(), typeAssumptions, typeVarFactory);
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Type premiseType = typeVarFactory.nextTypeVariable();
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Constraint newConstraint = new Constraint(conclusionType, premiseType);
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InferenceStep premise;
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if (typeInfererLet.getType().isPresent()) {
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Map<VarTerm, TypeAbstraction> extendedTypeAssumptions = new HashMap<>(typeAssumptions);
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extendedTypeAssumptions.replaceAll((key, value) -> {
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Type newType = value.getInnerType();
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for (Substitution substitution : typeInfererLet.getMGU().get()) {
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if (value.getQuantifiedVariables().contains(substitution.getVariable())) {
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continue;
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}
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newType = newType.substitute(substitution);
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}
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return new TypeAbstraction(newType, value.getQuantifiedVariables());
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});
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List<TypeVariable> variablesToQuantify = new ArrayList<>();
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// TODO variablesToQuantify berechnen
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TypeAbstraction newTypeAbstraction = new TypeAbstraction(typeInfererLet.getType().get(),
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variablesToQuantify);
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extendedTypeAssumptions.put(letTerm.getVariable(), newTypeAbstraction);
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premise = letTerm.getInner().accept(this, extendedTypeAssumptions, premiseType);
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constraints.add(newConstraint);
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constraints.addAll(typeInfererLet.getLetConstraints());
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} else {
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premise = new EmptyStep();
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}
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Conclusion conclusion = new Conclusion(typeAssumptions, letTerm, conclusionType);
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return stepFactory.createLetStep(conclusion, newConstraint, premise, typeInfererLet);
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}
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@Override
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32
src/main/java/edu/kit/typicalc/model/step/EmptyStep.java
Normal file
32
src/main/java/edu/kit/typicalc/model/step/EmptyStep.java
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@ -0,0 +1,32 @@
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package edu.kit.typicalc.model.step;
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import edu.kit.typicalc.model.Conclusion;
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import edu.kit.typicalc.model.Constraint;
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/**
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* Empty Steps are used if the sub-inference started when creating a let step failed and the second premise of
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* this let step therefore cannot be calculated.
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*/
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public class EmptyStep extends InferenceStep {
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/**
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* Initializes a new EmptyStep.
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*/
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public EmptyStep() {
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super(null, null); // TODO
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}
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@Override
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public Conclusion getConclusion() {
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throw new IllegalStateException("getConclusion() should never be called on an empty step");
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}
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@Override
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public Constraint getConstraint() {
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throw new IllegalStateException("getConstraint() should never be called on an empty step");
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}
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@Override
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public void accept(StepVisitor stepVisitor) {
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stepVisitor.visit(this);
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}
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}
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@ -47,8 +47,9 @@ public interface StepVisitor {
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*/
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void visit(LetStepDefault letD);
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/**
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* Visits an empty step
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* @param empty the empty step to visit
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*/
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void visit(EmptyStep empty);
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}
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@ -179,6 +179,11 @@ public class LatexCreator implements StepVisitor, TypeVisitor {
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// todo implement
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}
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@Override
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public void visit(EmptyStep empty) {
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// TODO
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}
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@Override
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public void visit(NamedType named) {
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visitorBuffer = TEXTTT + CURLY_LEFT + named.getName() + CURLY_RIGHT;
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