bs.open does not convert from ReasonML

[jfrolich]

exception Error(string);

let handlePromiseFailure =
  [@bs.open]
  (
    fun
    | Error(_) => ()
  );

Formats into

exception Error(string)

let handlePromiseFailure = x =>
  switch x {
  | Error(_) => ()
  }

The whole @bs.open is gone. I also have no idea how to express the code in the new rescript syntax.

https://rescript-lang.org/try?ext=re&code=KYDwxsAOAuCWD2A7ABAUQE7vugFAZ2nVkQHMBKAbgCgqAbYaZACwENEATegBSwFtY8wAGItYtAK7pgyALxVkyANoABAEZ4AdPEjBEAXXnIchhQDNxiE8gA+aTNhwB9MrIB8RsocpUgA

I think this is not a legacy way of handling exceptions as it has been introduced in 0.7 (https://github.com/rescript-lang/rescript-compiler/blob/master/site/docsource/Exception-handling.adoc#bsopen-type-safe-external-data-source-handling-since-170).

[IwanKaramazow]

Sorry about this, we don't yet supported this in the new syntax.
You can leave it in the old syntax or write the code that bs.open expands to:
https://rescript-lang.org/try?code=KYDwxsAOAuCWD2A7ABAUQE7vugFAZ2nVkQHMBKAKAoBthpkALAQ0QBNaAFLAW1j2ABiTWNQCu6YMgC8yYJmzSAfBWTJYAM2QApPADpUIRLr4BhJt2oGIMBIgDy6O5GCIAakyItoOOVnRlkAG8VVWQ8AHdYaDAGZBw7ACMAK11uJhJYMB95fwAuWUMA4NDkAB80HOy-DiYAT2p4JlYAqUVkAGV4bmAq7Br6xuaQ1XKAfSVkADkkYGHkAF8Q+dlqfiC56cRZ1UWaOmQAN2ltPS4uvmBdCSTgMG9p6FH1eFE2Sj36cZkj0radXTOvH4ujATGiDF66CUIQiURijBY7GAgIuQhE4h6vmwRRC5U63RwIBaf1OPAuV2AeHg1AOPSJuKmMwm-xRwIkVJpPQARFzKDsKAFfmoSIhsLMgA

I'm currently focused on infix operators and some printer improvements, will look into this after those.

[jfrolich]

Thanks!

[ryyppy]

This syntax feature might be irrelevant in the future (aka proper new promise api)

[stale]

The rescript-lang/syntax repo is obsolete and will be archived soon. If this issue is still relevant, please reopen in the compiler repo (https://github.com/rescript-lang/rescript-compiler) or comment here to ask for it to be moved. Thank you for your contributions.