private ConstantValue evaluateUnaryExpr(
Expression opParam, Type resultType, UnaryArithmeticOperation operation) {
// Evaluate the subexpression
ConstantValue paramValue = opParam.accept(this, null);
// Make the integer promotion
final ConstantType resultConstantType = typeFactory.newConstantType(resultType);
paramValue = paramValue.castTo(resultConstantType);
// Perform the operation
switch (operation) {
case IDENTITY:
return paramValue;
case NEGATION:
return paramValue.negate();
case BITWISE_NOT:
return paramValue.bitwiseNot();
default:
throw new RuntimeException("unexpected unary arithmetic operation '" + operation + "'");
}
}
