Maybe the select all problem is because the cursor is at the end of the file. Try adding a begin_select() call at the start to move the cursor to the start of the selection.
On my machine, a line containing only a comment doesn't actually get deleted - but the comment does get deleted, leaving a blank line. I'm using Windows 11.
If the // is immediately preceded by a non whitespace character the comment doesn't get deleted - I don't know why this is. Also it doesn't seem to allow for // in a string.
I have a couple of suggestions. If I record a macro to search for any character (search string is set to . and reg expression enabled) and select colour coding of "comment" it finds the start of the next comment - if it's not already in a comment. If I record a macro doing this I get the following
_command last_recorded_macro() name_info(','VSARG2_MACRO|VSARG2_MARK|VSARG2_REQUIRES_EDITORCTL)
{
_macro('R',1);
if (find('.',"LIPCC,,")) stop();
}
The search function you're using can also search for comments.
There's also a macro you can call to tell if the cursor is in a comment
_in_comment()
and it can distinguish between block comment and line comment.
I notice that Ctrl Z undo manages to undo all changes in one go with your current method. If you change to some manually looping code, Ctrl Z might undo one by one - I don't know.
