protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var left = LeftOprand.Evaluation(parameters);
var right = rightOprand.Evaluation(parameters);
if (left == ExpressionConstants.Unevaluatable || right == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
if (left == null)
{
return(right == null ? LiteralBoolean.True : LiteralBoolean.False);
}
if (right == null)
{
return(LiteralBoolean.False);
}
if (left is Number || right is Number)
{
var pair = ExprEvalUtils.ConvertNum2SameLevel(left, right);
left = pair.Key;
right = pair.Value;
}
return(left.Equals(right) ? LiteralBoolean.True : LiteralBoolean.False);
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var operand = Operand.Evaluation(parameters);
if (operand == null)
{
return(0);
}
if (operand == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
Number num = null;
if (operand is string)
{
num = ExprEvalUtils.String2Number((string)operand);
}
else
{
num = (Number)operand;
}
return(ExprEvalUtils.Calculate(this, num));
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var operand = Operand.Evaluation(parameters);
if (operand == null)
{
return(null);
}
if (operand == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
var @bool = ExprEvalUtils.Obj2bool(operand);
return(@bool ? LiteralBoolean.False : LiteralBoolean.True);
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var left = LeftOprand.Evaluation(parameters);
var right = rightOprand.Evaluation(parameters);
if (left == null || right == null)
{
return(null);
}
if (left == ExpressionConstants.Unevaluatable || right == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
var pair = ExprEvalUtils.ConvertNum2SameLevel(left, right);
return(ExprEvalUtils.Calculate(this, pair.Key, pair.Value));
}
/// <param name="obj1">not null</param>
/// <param name="obj2">not null</param>
private static bool CompareEvaluatedValue(object obj1, object obj2)
{
if (obj1.Equals(obj2))
{
return(true);
}
try
{
var pair = ExprEvalUtils.ConvertNum2SameLevel(obj1, obj2);
return(pair.Key.Equals(pair.Value));
}
catch (Exception)
{
return(false);
}
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var left = LeftOprand.Evaluation(parameters);
var right = rightOprand.Evaluation(parameters);
if (left == null || right == null)
{
return(null);
}
if (left == ExpressionConstants.Unevaluatable || right == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
var b1 = ExprEvalUtils.Obj2bool(left);
var b2 = ExprEvalUtils.Obj2bool(right);
return(b1 != b2 ? LiteralBoolean.True : LiteralBoolean.False);
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
foreach (var operand in operands)
{
var val = operand.Evaluation(parameters);
if (val == null)
{
return(null);
}
if (val == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
if (ExprEvalUtils.Obj2bool(val))
{
return(LiteralBoolean.True);
}
}
return(LiteralBoolean.False);
}
