//this class simplifies this:
// timesheet.Entries.Any() == true
//to this:
// timesheet.Entries.Any()
private Expression ProcessBinaryExpression(Expression exprToCompare, Expression exprToReturn, ExpressionType nodeType, Expression original)
{
BooleanConstantFinder visitor = new BooleanConstantFinder();
visitor.Visit(exprToCompare);
if (visitor.Constant.HasValue)
{
switch (nodeType)
{
case ExpressionType.Equal:
return(visitor.Constant.Value ? exprToReturn : Expression.Not(exprToReturn));
case ExpressionType.NotEqual:
return(visitor.Constant.Value ? Expression.Not(exprToReturn) : exprToReturn);
case ExpressionType.Or:
case ExpressionType.OrElse:
return(visitor.Constant.Value ? Expression.Constant(true) : exprToReturn);
case ExpressionType.And:
case ExpressionType.AndAlso:
return(visitor.Constant.Value ? exprToReturn : Expression.Constant(false));
default:
return(original);
}
}
else
{
return(original);
}
}
//this class simplifies this:
// timesheet.Entries.Any() == true
//to this:
// timesheet.Entries.Any()
private Expression ProcessBinaryExpression(Expression exprToCompare, Expression exprToReturn, ExpressionType nodeType, Expression original)
{
BooleanConstantFinder visitor = new BooleanConstantFinder();
visitor.Visit(exprToCompare);
if (visitor.Constant.HasValue)
{
switch (nodeType)
{
case ExpressionType.Equal:
return visitor.Constant.Value ? exprToReturn : Expression.Not(exprToReturn);
case ExpressionType.NotEqual:
return visitor.Constant.Value ? Expression.Not(exprToReturn) : exprToReturn;
case ExpressionType.Or:
case ExpressionType.OrElse:
return visitor.Constant.Value ? Expression.Constant(true) : exprToReturn;
case ExpressionType.And:
case ExpressionType.AndAlso:
return visitor.Constant.Value ? exprToReturn : Expression.Constant(false);
default:
return original;
}
}
else
return original;
}
