protected override Expression VisitBinary(BinaryExpression node)
{
if (node.Left.Type == typeof(string) && node.Right.Type == typeof(string))
{
if (node.NodeType == ExpressionType.Equal)
{
var exp = ((LambdaExpression)MakeExpression(s => s.Equals("asdf", _comparer))).Body;
exp = new ReplacingVisitor(((dynamic)exp).Arguments[0], ((dynamic)node).Left).Visit(exp);
exp = new ReplacingVisitor(((dynamic)exp).Object, ((dynamic)node).Right).Visit(exp);
return(exp);
}
if (node.NodeType == ExpressionType.NotEqual)
{
var exp = ((LambdaExpression)MakeExpression(s => !s.Equals("asdf", _comparer))).Body;
exp = new ReplacingVisitor(((dynamic)exp).Operand.Arguments[0], ((dynamic)node).Left).Visit(exp);
exp = new ReplacingVisitor(((dynamic)exp).Operand.Object, ((dynamic)node).Right).Visit(exp);
return(exp);
}
}
return(base.VisitBinary(node));
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
if (node.Method.DeclaringType == typeof(string))
{
if (node.Method.Name == "Contains")
{
var exp = ((LambdaExpression)MakeExpression(s => s.IndexOf("asdf", _comparer) > -1)).Body;
exp =
new ReplacingVisitor(((dynamic)exp).Left.Arguments[0], ((dynamic)node).Arguments[0]).Visit(exp);
exp = new ReplacingVisitor(((dynamic)exp).Left.Object, ((dynamic)node).Object).Visit(exp);
return(exp);
}
if (node.Method.Name == "StartsWith")
{
var exp = ((LambdaExpression)MakeExpression(s => s.IndexOf("asdf", _comparer) == 0)).Body;
exp =
new ReplacingVisitor(((dynamic)exp).Left.Arguments[0], ((dynamic)node).Arguments[0]).Visit(exp);
exp = new ReplacingVisitor(((dynamic)exp).Left.Object, ((dynamic)node).Object).Visit(exp);
return(exp);
}
if (node.Method.Name == "EndsWith")
{
var exp = ((LambdaExpression)MakeExpression(s => s.EndsWith("asdf", _comparer))).Body;
exp = new ReplacingVisitor(((dynamic)exp).Arguments[0], ((dynamic)node).Arguments[0]).Visit(exp);
exp = new ReplacingVisitor(((dynamic)exp).Object, ((dynamic)node).Object).Visit(exp);
return(exp);
}
if (node.Method.Name == "Equals")
{
var exp = ((LambdaExpression)MakeExpression(s => s.Equals("asdf", _comparer))).Body;
exp = new ReplacingVisitor(((dynamic)exp).Arguments[0], ((dynamic)node).Arguments[0]).Visit(exp);
exp = new ReplacingVisitor(((dynamic)exp).Object, ((dynamic)node).Object).Visit(exp);
return(exp);
}
}
return(base.VisitMethodCall(node));
}