/// <summary>
/// Get an element from the set.
/// </summary>
/// <returns>An element if non-empty.</returns>
public T Element()
{
var model = this.Solver.Satisfiable(this.Set);
if (!model.HasValue)
{
throw new ZenException("No element exists in state set.");
}
var assignment = new Dictionary <object, object>();
foreach (var kv in this.ArbitraryMapping)
{
var value = this.Solver.Get(model.Value, kv.Value);
assignment[kv.Key] = value;
}
var interpreterEnv = new ExpressionEvaluatorEnvironment(assignment);
return(CommonUtilities.ConvertSymbolicResultToCSharp <T>(this.ZenExpression.Accept(new ExpressionEvaluator(false), interpreterEnv)));
}
/// <summary>
/// Get an element from the set.
/// </summary>
/// <returns>An element if non-empty.</returns>
public Option <T> Element()
{
var model = this.Solver.Satisfiable(this.Set);
if (!model.HasValue)
{
return(Option.None <T>());
}
var assignment = new Dictionary <object, object>();
foreach (var kv in this.ArbitraryMapping)
{
var value = this.Solver.Get(model.Value, kv.Value);
assignment[kv.Key] = value;
}
var interpreterEnv = new ExpressionEvaluatorEnvironment(assignment);
var result = CommonUtilities.ConvertSymbolicResultToCSharp <T>(this.ZenExpression.Accept(new ExpressionEvaluator(false), interpreterEnv));
return(Option.Some(result));
}