Parser error for attribute transform

[Mbodin]

When I tried the following program:

let%svg test = "<g transform='translate(1,1)'></g>"

I got this error:

Error: Value of transform must be an SVG transform

I'm very surprised as the corresponding parser looks correct:

tyxml/syntax/attribute_value.ml

Line 350 in d291653

let transform =

Here follow the versions of my dependencies. I'm pinning to specific commits to get this fix: aantron/markup.ml#69

tyxml-ppx: github:ocsigen/tyxml:tyxml-ppx.opam#d2916535536f2134bad7793a598ba5b7327cae41@a609c0aa
tyxml@opam:4.6.0@5ced2c2c
tyxml-syntax@opam:4.6.0@0e4fa721
markup: github:aantron/markup.ml#d77da228ed8915b6f11fbea00c269cfd5fd9e84a

My environment is a bit dirty at the moment. Does it reproduce on your side?

### Tasks

[Mbodin]

I think that I understand the issue.

In TyXML, it seems that the input is first split along spaces and commas, then parsed:

tyxml/syntax/reflect/reflect.ml

Line 202 in d291653

| [[%type: transforms]] ->

This means that a value of transform (1,1) is transformed first into transform, (1, and 1), then each of these three items are parsed along the transform parser, which expected to see only one block transform (1,1), so each of them is treated as invalid.

Note that in contrary to what is written in the transform parser, white spaces can be expected between transform and its arguments: https://drafts.csswg.org/css-transforms/#svg-translate

[Mbodin]

This means that in the current state, it is not possible to parse any matrix value. We are definitively missing some tests here.

I'm trying to see what I can do to fix the issue.