112 lines
6.3 KiB
112 lines
6.3 KiB
#include "src/storage/expressions/ToRationalNumberVisitor.h"
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#include "src/utility/macros.h"
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#include "src/utility/constants.h"
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#include "src/exceptions/InvalidArgumentException.h"
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#include "src/exceptions/NotSupportedException.h"
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namespace storm {
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namespace expressions {
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template<typename RationalNumberType>
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ToRationalNumberVisitor<RationalNumberType>::ToRationalNumberVisitor() : ExpressionVisitor() {
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// Intentionally left empty.
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}
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template<typename RationalNumberType>
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RationalNumberType ToRationalNumberVisitor<RationalNumberType>::toRationalNumber(Expression const& expression) {
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return boost::any_cast<RationalNumberType>(expression.accept(*this));
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(IfThenElseExpression const& expression) {
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STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Expression cannot be translated into a rational number.");
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(BinaryBooleanFunctionExpression const& expression) {
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STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Expression cannot be translated into a rational number.");
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(BinaryNumericalFunctionExpression const& expression) {
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RationalNumberType firstOperandAsRationalNumber = boost::any_cast<RationalNumberType>(expression.getFirstOperand()->accept(*this));
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RationalNumberType secondOperandAsRationalNumber = boost::any_cast<RationalNumberType>(expression.getSecondOperand()->accept(*this));
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switch(expression.getOperatorType()) {
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case BinaryNumericalFunctionExpression::OperatorType::Plus:
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return firstOperandAsRationalNumber + secondOperandAsRationalNumber;
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break;
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case BinaryNumericalFunctionExpression::OperatorType::Minus:
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return firstOperandAsRationalNumber - secondOperandAsRationalNumber;
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break;
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case BinaryNumericalFunctionExpression::OperatorType::Times:
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return firstOperandAsRationalNumber * secondOperandAsRationalNumber;
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break;
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case BinaryNumericalFunctionExpression::OperatorType::Divide:
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return firstOperandAsRationalNumber / secondOperandAsRationalNumber;
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break;
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case BinaryNumericalFunctionExpression::OperatorType::Min:
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return std::min(firstOperandAsRationalNumber, secondOperandAsRationalNumber);
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break;
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case BinaryNumericalFunctionExpression::OperatorType::Max:
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return std::max(firstOperandAsRationalNumber, secondOperandAsRationalNumber);
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break;
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case BinaryNumericalFunctionExpression::OperatorType::Power:
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STORM_LOG_THROW(storm::utility::isInteger(secondOperandAsRationalNumber), storm::exceptions::InvalidArgumentException, "Exponent of power operator must be a positive integer.");
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uint_fast64_t exponentAsInteger = storm::utility::convertNumber<uint_fast64_t>(secondOperandAsRationalNumber);
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return storm::utility::pow(firstOperandAsRationalNumber, exponentAsInteger);
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break;
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}
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// Return a dummy. This point must, however, never be reached.
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STORM_LOG_ASSERT(false, "Illegal operator type.");
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return boost::any();
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(BinaryRelationExpression const& expression) {
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STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Expression cannot be translated into a rational number.");
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(VariableExpression const& expression) {
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STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Cannot transform expressions containing variables to a rational number.");
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(UnaryBooleanFunctionExpression const& expression) {
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STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Expression cannot be translated into a rational number.");
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(UnaryNumericalFunctionExpression const& expression) {
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STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Expression cannot be translated into a rational number.");
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(BooleanLiteralExpression const& expression) {
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STORM_LOG_THROW(false, storm::exceptions::InvalidArgumentException, "Expression cannot be translated into a rational number.");
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(IntegerLiteralExpression const& expression) {
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#ifdef STORM_HAVE_CARL
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return RationalNumberType(carl::rationalize<storm::RationalNumber>(static_cast<size_t>(expression.getValue())));
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#else
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STORM_LOG_THROW(false, storm::exceptions::NotSupportedException, "Rational numbers are not supported in this build.");
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#endif
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}
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template<typename RationalNumberType>
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boost::any ToRationalNumberVisitor<RationalNumberType>::visit(RationalLiteralExpression const& expression) {
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#ifdef STORM_HAVE_CARL
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return expression.getValue();
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#else
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STORM_LOG_THROW(false, storm::exceptions::NotSupportedException, "Rational numbers are not supported in this build.");
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#endif
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}
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#ifdef STORM_HAVE_CARL
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template class ToRationalNumberVisitor<storm::RationalNumber>;
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#endif
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}
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}
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