String interpolation changed in v10?

[davesnx]

Hi, in rescript v9 I used to generate the syntax from Reason for string interpolation with js extension: {js||js}, I believe looked something like js``.

Currently, this fails with ReScript 10. After checking the changelog I don't see any breaking change regarding this.

This issue for a code example is: davesnx/styled-ppx#308

The cx() generates `js.`

[davesnx]

Update on this issue. Looking at the parsetree I'm able to see and debug what's the issue:

$ yarn bsc -dparsetree -e 'let a = %css(`content: " "`)'

  Warning number 108
  /var/folders/yq/h17dmhjj3rz_6dqsnrd950gc0000gn/T/evala23d0e.res:1:14-27

  1 │ let a = %css(`content: " "`)

  Uninterpreted delimiters js

[
  structure_item
    Pstr_value Nonrec
    [
      <def>
        pattern
          Ppat_var "a"
        expression
          Pexp_extension "css"
          [
            structure_item
              Pstr_eval
              expression
                attribute  "res.template"
                  []
                Pexp_constant PConst_string ("content: \" \"",Some "js")
          ]
    ]
]

  We've found a bug for you!
  /Users/davesnx/Code/github/davesnx/styled-ppx/packages/demo/rescript/src/index.res

  Unexpected error Attributes not allowed here

[davesnx]

So, it's the same issue as zth/rescript-relay#372.