/// <summary>
/// 获取简单表达式
/// </summary>
/// <param name="binaryExpression">二元表达式</param>
/// <returns>简单表达式</returns>
private static TmphExpression getSimpleNotEqual(TmphBinaryExpression binaryExpression)
{
if (binaryExpression.Left.IsConstant && binaryExpression.Right.IsConstant)
{
var leftValue = ((TmphConstantExpression)binaryExpression.Left).Value;
var rightValue = ((TmphConstantExpression)binaryExpression.Right).Value;
binaryExpression.PushPool();
return
TmphLogicConstantExpression.Get(leftValue == null ? rightValue != null : !leftValue.Equals(rightValue));
}
return binaryExpression;
}
/// <summary>
/// 获取简单表达式
/// </summary>
/// <param name="binaryExpression">二元表达式</param>
/// <returns>简单表达式</returns>
private static TmphExpression getSimpleLessThanOrEqual(TmphBinaryExpression binaryExpression)
{
if (binaryExpression.Left.IsConstant && binaryExpression.Right.IsConstant)
{
var value = ((IComparable)((TmphConstantExpression)binaryExpression.Left).Value)
.CompareTo(((TmphConstantExpression)binaryExpression.Right).Value);
binaryExpression.PushPool();
return TmphLogicConstantExpression.Get(value <= 0);
}
return binaryExpression;
}
/// <summary>
/// 获取简单表达式
/// </summary>
/// <param name="binaryExpression">二元表达式</param>
/// <returns>简单表达式</returns>
private static TmphExpression getSimpleAndAlso(TmphBinaryExpression binaryExpression)
{
if (binaryExpression.Left.NodeType == TmphExpressionType.LogicConstant)
{
TmphExpression expression;
if (((TmphLogicConstantExpression)binaryExpression.Left).Value)
{
expression = binaryExpression.Right;
binaryExpression.Right = null;
}
else
{
expression = binaryExpression.Left;
binaryExpression.Left = null;
}
--expression.ExpressionCount;
binaryExpression.PushPool();
return expression;
}
if (binaryExpression.Right.NodeType == TmphExpressionType.LogicConstant)
{
TmphExpression expression;
if (((TmphLogicConstantExpression)binaryExpression.Right).Value)
{
expression = binaryExpression.Left;
binaryExpression.Left = null;
}
else
{
expression = binaryExpression.Right;
binaryExpression.Right = null;
}
--expression.ExpressionCount;
binaryExpression.PushPool();
return expression;
}
return binaryExpression;
}
