Dump line number

JohnGoldsmith · January 2021

Is there a better way to achieve the dumping of the calling line number?

I tried the following in MyExtensions, but the output line number doesn't correspond to the calling line number in the query:

    public static T DumpEx<T>(this T o, [CallerLineNumber] int callingFileLineNumber = 0)
    {
        return o.Dump(callingFileLineNumber.ToString(), null);
    }

    public static T DumpEx<T>(this T o, string description, [CallerLineNumber] int callingFileLineNumber = 0)
    {
        return o.Dump($"{description} {callingFileLineNumber}", null);
    }

Best regards

John

JoeAlbahari · January 2021

This won't work because My Extensions is compiled separately and referenced as a DLL.

You could try writing these extension methods in a separate query and then #load it.

JohnGoldsmith · January 2021

Ok, that makes sense. Thank you.

In that case for anyone else who stumbles across this, the following works for LINQPad 6:

[DumpEx_Extensions.linq]

void Main()
{
}

public static class DumpExExtensions
{
    public static T DumpEx<T>(this T o, [CallerLineNumber] int callingFileLineNumber = 0)
    {
        return o.Dump(callingFileLineNumber.ToString(), null);
    }

    public static T DumpEx<T>(this T o, string description, [CallerLineNumber] int callingFileLineNumber = 0)
    {
        return o.Dump($"{callingFileLineNumber} {description}", null);
    }
}

[CallerWithLoad.linq]

#load ".\Shared\DumpEx_Extensions.linq"
void Main()
{
    var name = "Harold";
    var full = $"{name} Wilson";

    full.DumpEx("Full name");
}

Looking at this though, I think I'm going to ditch the DumpEx extensions and just go with a function that returns the line number which will be more flexible. So:

[LineNumber.linq]

void Main()
{
}

public static int Line([CallerLineNumber] int callingFileLineNumber = 0)
{
    return callingFileLineNumber;
}

and usage:

Using string interpolation makes it more flexible I think.

Anyway, thank you for the #load feature and love the intellisense when setting:

If there's an easy option to slip a current line number token into Dump for LINQPad 5 that would be great too!

Best regards

John

JoeAlbahari · January 2021

Another option, which will work from My Extensions, is this:

int lineNumber = new StackTrace(true).GetFrame(1).GetFileLineNumber();

(Unfortunately, it won't work in LINQPad 5.)

JohnGoldsmith · January 2021

Oh good solution, thank you. I'll give that a go in 6.

Dump line number

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