public static IEnumerable <bool> For(WamMachine machine, WamReferenceTarget[] arguments)
{
Debug.Assert(arguments.Length == 3);
var wamReferenceTargetFrom = arguments[1].Dereference();
var wamValueIntegerFrom = wamReferenceTargetFrom as WamValueInteger;
if (wamValueIntegerFrom == null)
{
yield break;
}
var wamReferenceTargetTo = arguments[2].Dereference();
var wamValueIntegerTo = wamReferenceTargetTo as WamValueInteger;
if (wamValueIntegerTo == null)
{
yield break;
}
for (var index = wamValueIntegerFrom.Value; index <= wamValueIntegerTo.Value; ++index)
{
var wamValueIntegerResult = WamValueInteger.Create(index);
if (machine.Unify(arguments[0], wamValueIntegerResult))
{
yield return(true);
}
else
{
yield break;
}
}
}
public static bool GetSeed(WamMachine machine, WamReferenceTarget[] arguments)
{
Debug.Assert(arguments.Length == 1);
var operand = arguments[0];
var seed = WamValueInteger.Create(s_seed);
return(machine.Unify(operand, seed));
}
public static bool SetSeed(WamMachine machine, WamReferenceTarget[] arguments)
{
Debug.Assert(arguments.Length == 1);
WamValueInteger operand = arguments[0].Dereference() as WamValueInteger;
if (operand == null)
{
return(false);
}
s_seed = operand.Value;
s_random = new Random(s_seed);
return(true);
}
/// <remarks>
/// See also CodeValue.Create.
/// </remarks>
public static WamValue Create(CodeValue value)
{
if (value == null)
{
return(WamValueObject.Create(null));
}
if (value is CodeValueBoolean)
{
return(WamValueBoolean.Create(((CodeValueBoolean)value).Value));
}
if (value is CodeValueDateTime)
{
return(WamValueDateTime.Create(((CodeValueDateTime)value).Value));
}
if (value is CodeValueDouble)
{
return(WamValueDouble.Create(((CodeValueDouble)value).Value));
}
if (value is CodeValueException)
{
return(WamValueException.Create(((CodeValueException)value).Value));
}
if (value is CodeValueInteger)
{
return(WamValueInteger.Create(((CodeValueInteger)value).Value));
}
if (value is CodeValueString)
{
return(WamValueString.Create(((CodeValueString)value).Value));
}
if (value is CodeValueType)
{
return(WamValueType.Create(((CodeValueType)value).Value));
}
return(WamValueObject.Create(value.Object));
}
public static bool Next(WamMachine machine, WamReferenceTarget[] arguments)
{
Debug.Assert(arguments.Length == 3);
var minValue = arguments[0].Dereference() as WamValueInteger;
if (minValue == null)
{
return(false);
}
var maxValue = arguments[1].Dereference() as WamValueInteger;
if (maxValue == null)
{
return(false);
}
var operand = arguments[2];
var value = WamValueInteger.Create(s_random.Next(minValue.Value, maxValue.Value));
return(machine.Unify(operand, value));
}