static NewExpression MutateNew(NewExpression node, IList <Expression> operands)
{
Type[] types = node.Members == null?node.Constructor.GetParameters().Select(p => p.ParameterType).ToArray()
: node.Members.Select(m => m.GetMemberType()).ToArray();
for (int i = 0; i < operands.Count; i++)
{
operands[i] = ExpressionUtil.CheckNeedConvert(operands[i], types[i]);
}
return(node.Update(operands));
}
public static BinaryExpression MakeGreaterThanZero(Expression expr)
{
var zeroExpr = ExpressionUtil.MakeZero(expr.Type);
return(Expression.GreaterThan(expr, zeroExpr));
}
static BinaryExpression MutateBinary(BinaryExpression node, IList <Expression> operands)
{
// After replacing arguments with column expressions there might be a problem with nullable columns.
// The following code compensates for this
return(ExpressionUtil.MakeBinary(node.NodeType, operands[0], operands[1]));
}