Examples with Type com.sri.ai.expresso.api.Type used on opensource projects

Example 1 with Type

use of com.sri.ai.expresso.api.Type in project aic-expresso by aic-sri-international.

the class ExpressionStepSolverToLiteralSplitterStepSolverAdapterTest method testCompoundTheoryWithDifferenceArithmeticWithRandomDisjunctiveFormulas.

@Test
public void testCompoundTheoryWithDifferenceArithmeticWithRandomDisjunctiveFormulas() {
    TheoryTestingSupport theoryTestingSupport = TheoryTestingSupport.make(makeRandom(), new CompoundTheory(new EqualityTheory(false, true), new DifferenceArithmeticTheory(false, true), new PropositionalTheory()));
    // using different testing variables and types to test distribution of testing information
    // to sub constraint theories.
    Categorical booleanType = BOOLEAN_TYPE;
    Categorical dogsType = new Categorical("Dogs", 4, arrayList(parse("fido"), parse("rex")));
    IntegerInterval oneTwoThree = new IntegerInterval(1, 3);
    Map<String, Type> variablesAndTypes = map("F", booleanType, "G", booleanType, "R", dogsType, "S", dogsType, "T", oneTwoThree, "U", oneTwoThree);
    theoryTestingSupport.setVariableNamesAndTypesForTesting(variablesAndTypes);
    runRandomDisjunctiveFormulasTest(theoryTestingSupport);
}

Example 2 with Type

use of com.sri.ai.expresso.api.Type in project aic-expresso by aic-sri-international.

the class AssignmentsIteratorTest method test2.

@Test
public void test2() {
    Registry registry = new DefaultRegistry();
    Type myType = new Categorical("People", 2, arrayList(makeSymbol("oscar"), makeSymbol("mary")));
    Symbol x = makeSymbol("X");
    Symbol y = makeSymbol("Y");
    String expected = "{X=oscar, Y=oscar}\n" + "{X=mary, Y=oscar}\n" + "{X=oscar, Y=mary}\n" + "{X=mary, Y=mary}";
    Symbol myTypeExpression = makeSymbol(myType.getName());
    registry = registry.add(myType);
    registry = registry.registerAdditionalSymbolsAndTypes(map(x, myTypeExpression, y, myTypeExpression));
    AssignmentsIterator assignmentsIterator = new AssignmentsIterator(list(x, y), registry);
    String actual = join("\n", assignmentsIterator);
    // System.out.println(actual);	
    assertEquals(expected, actual);
}

Example 3 with Type

use of com.sri.ai.expresso.api.Type in project aic-expresso by aic-sri-international.

the class AssignmentsIteratorTest method test3.

@Test
public void test3() {
    Registry registry = new DefaultRegistry();
    Type peopleType = new Categorical("People", 4, arrayList(makeSymbol("oscar"), makeSymbol("mary")));
    Type petsType = new Categorical("Pets", 3, arrayList(makeSymbol("fido"), makeSymbol("purrs")));
    Symbol x = makeSymbol("X");
    Symbol y = makeSymbol("Y");
    String expected = "{X=oscar, Y=fido}\n" + "{X=mary, Y=fido}\n" + "{X=people3, Y=fido}\n" + "{X=people4, Y=fido}\n" + "{X=oscar, Y=purrs}\n" + "{X=mary, Y=purrs}\n" + "{X=people3, Y=purrs}\n" + "{X=people4, Y=purrs}\n" + "{X=oscar, Y=pets3}\n" + "{X=mary, Y=pets3}\n" + "{X=people3, Y=pets3}\n" + "{X=people4, Y=pets3}";
    Symbol myPeopleTypeExpression = makeSymbol(peopleType.getName());
    Symbol myPetsTypeExpression = makeSymbol(petsType.getName());
    registry = registry.add(peopleType);
    registry = registry.add(petsType);
    registry = registry.registerAdditionalSymbolsAndTypes(map(x, myPeopleTypeExpression, y, myPetsTypeExpression));
    AssignmentsIterator assignmentsIterator = new AssignmentsIterator(list(x, y), registry);
    String actual = join("\n", assignmentsIterator);
    // System.out.println(actual);	
    assertEquals(expected, actual);
}

Example 4 with Type

use of com.sri.ai.expresso.api.Type in project aic-expresso by aic-sri-international.

the class Compilation method compile.

/**
	 * Compiles an expression to a normalized (decision-tree-like) expression.
	 * @param inputExpression
	 * @param mapFromVariableNameToTypeName
	 * @param mapFromCategoricalTypeNameToSizeString
	 * @param additionalTypes
	 * @param solverListener if not null, invoked on solver used for compilation, before and after compilation starts; returned solver on 'before' invocation is used (it may be the same one used as argument, of course).
	 * @return
	 */
public static Expression compile(Expression inputExpression, Theory theory, Map<String, String> mapFromVariableNameToTypeName, Map<String, String> mapFromUniquelyNamedConstantToTypeName, Map<String, String> mapFromCategoricalTypeNameToSizeString, Collection<Type> additionalTypes, Function<MultiIndexQuantifierEliminator, MultiIndexQuantifierEliminator> solverListener) {
    // the group actually does not matter, because we are not going to have any indices.
    AssociativeCommutativeGroup group = new Max();
    // The solver for the parameters above.
    MultiIndexQuantifierEliminator solver = new SGDPLLT();
    if (solverListener != null) {
        solver = solverListener.apply(solver);
    }
    // We use the Prolog convention of small-letter initials for constants, but we need an exception for the random variables.
    Predicate<Expression> isPrologConstant = new PrologConstantPredicate();
    Predicate<Expression> isUniquelyNamedConstantPredicate = e -> isPrologConstant.apply(e) && !mapFromVariableNameToTypeName.containsKey(e);
    Map<String, String> mapFromSymbolNameToTypeName = new LinkedHashMap<>(mapFromVariableNameToTypeName);
    mapFromSymbolNameToTypeName.putAll(mapFromUniquelyNamedConstantToTypeName);
    // Solve the problem.
    // no indices; we want to keep all variables
    List<Expression> indices = Util.list();
    Expression result = solver.solve(group, inputExpression, indices, mapFromSymbolNameToTypeName, mapFromCategoricalTypeNameToSizeString, additionalTypes, isUniquelyNamedConstantPredicate, theory);
    if (solverListener != null) {
        solverListener.apply(null);
    }
    return result;
}

Example 5 with Type

use of com.sri.ai.expresso.api.Type in project aic-expresso by aic-sri-international.

the class Context method extendWith.

/**
	 * Extends context with index expressions, taking into account that new contextual variables may collide with existing ones.
	 * In this case, it renames the incoming variables to unique identifiers and replaces them in the types of remaining
	 * index expressions. It also renames the variables in a given expressions supposed to be in their scope (for example,
	 * the head and condition of an intensionally defined set).
	 * Returns the new context and the index expressions and expression in scope after the renaming.
	 * @param indexExpressions
	 * @param expressionInScope
	 * @return the new context and the index expressions and expression in scope after the renaming
	 */
default default Triple<Context, ExtensionalIndexExpressionsSet, Expression> extendWith(ExtensionalIndexExpressionsSet indexExpressions, Expression expressionInScope) {
    Triple<Context, ExtensionalIndexExpressionsSet, Expression> result;
    if (thereExists(getIndices(indexExpressions), index -> this.containsSymbol(index))) {
        // OPTIMIZATION: only kick in this entire procedure when extending with symbol in the context (previous ones could have been dealt with normally).
        // the objects to be returned in the triple:
        Context newContext = this;
        ArrayList<Expression> newIndexExpressionsList = new ArrayList<>(indexExpressions.getList());
        Expression newExpressionInScope = expressionInScope;
        // Collects all existing symbols to be able to create unique symbols
        Set<Expression> alreadyDefined = Util.set();
        alreadyDefined.addAll(this.getSymbols());
        alreadyDefined.addAll(Expressions.freeSymbols(new DefaultTuple(newIndexExpressionsList), this));
        alreadyDefined.addAll(Expressions.freeSymbols(expressionInScope, this));
        Predicate<Expression> isAlreadyDefined = e -> alreadyDefined.contains(e);
        for (int i = 0; i != newIndexExpressionsList.size(); i++) {
            Expression indexExpression = newIndexExpressionsList.get(i);
            Symbol index = (Symbol) indexExpression.get(0);
            Expression type = indexExpression.get(1);
            PairOf<Expression> newIndexAndNewExpressionInScope = Expressions.standardizeApart(index, isAlreadyDefined, newExpressionInScope);
            Expression newIndex = newIndexAndNewExpressionInScope.first;
            newExpressionInScope = newIndexAndNewExpressionInScope.second;
            // type should not contain the index
            Expression newIndexExpression = apply(IN, newIndex, type);
            newIndexExpressionsList.set(i, newIndexExpression);
            alreadyDefined.add(newIndex);
            for (int j = i + 1; j != newIndexExpressionsList.size(); j++) {
                Expression anotherIndexExpression = newIndexExpressionsList.get(j);
                Expression anotherIndex = anotherIndexExpression.get(0);
                Expression anotherType = anotherIndexExpression.get(1);
                Expression newAnotherType = anotherType.replaceSymbol(index, newIndex, this);
                // anotherIndex is a symbols and does not contain index
                Expression newAnotherIndexExpression = apply(IN, anotherIndex, newAnotherType);
                newIndexExpressionsList.set(j, newAnotherIndexExpression);
            }
        }
        ExtensionalIndexExpressionsSet newIndexExpressions = new ExtensionalIndexExpressionsSet(newIndexExpressionsList);
        newContext = newContext.extendWith(newIndexExpressions);
        result = triple(newContext, newIndexExpressions, newExpressionInScope);
    } else {
        // no collision; usual extension and the expressions do not change.
        result = triple(extendWith(indexExpressions), indexExpressions, expressionInScope);
    }
    return result;
}