Backwards arrows

[tolomea]

Proposal

As a way to force node rank a bit it would be nice if there was a syntax for an arrow that goes up / left.
For the layout engine this would work like a normal arrow, but the rendering would put the head at the other end.
So for a minimal change you could control which links go up.
The obvious syntax is <--

Example

In this

flowchart TD
    a --> b
    b --> a

it's kinda up to the layout engine whether a or b is on top
but in

flowchart TD
    a --> b
    a <-- b

it's unambiguous that a goes on top
the layout engine would process this the same as

flowchart TD
    a --> b
    a --> b

but then the display engine would draw the second arrow the other way around

Screenshots

No response

[sidharthv96]

We unfortunately cannot use <--, as < will be interpreted as HTML tag opening.

[jhv2017kam]

We unfortunately cannot use <--, as < will be interpreted as HTML tag opening.

Why not, a HTML tag name can not start with hyphen e.g. <-notAValidHTMLTag/>