Distinguish header's VerticalLines and cell's VerticalLines

[tisonkun]

I have a table formatted as:

 fetch_stats | col1 | col2  
============================
 foobar      | v1   | value 
 baz         | long | v

I'd like to format it as:

 fetch_stats  col1  col2  
============================
 foobar      | v1   | value 
 baz         | long | v

But it seems so far VerticalLines controls both sides.

@Nukesor Thoughts?

[tisonkun]

FYI the preset is:

let mut table = Table::new();
table.load_preset("                   "); // unset all
table.set_style(TableComponent::HeaderLines, '=');
table.set_style(TableComponent::MiddleHeaderIntersections, '=');
table.set_style(TableComponent::VerticalLines, '|');

[Nukesor]

I simply didn't consider that this was a possible layout anyone would want :D

Would I rewrite comfy-table today, I would also most certainly not use that layout format 😓. That string makes it practically impossible to introduce new enum variants in the middle. They must be at the end to prevent breakage.

So yeah, I would be up for a new component. Probably something like HeaderVerticalLines? The question is: How do we introduce this without breaking old layouts? I have no good solution for that from the top of my head.