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Craig Tiller 57a18b62ba Revert "[promises] Add an optimizer for `Seq`, `TrySeq` (#38445 )" (#38748 ) This reverts commit `a7a650a74e`. Original PR breaks #38286 and I think the breakage is in the PR -- in a construct like: ``` TrySeq( /a/ []() -> Promise<absl::Status>, /b/ []() -> Promise<StatusFlag>, /c/ []() -> Promise<absl::Status>) ``` the original seq_state code would try to promote the intermediate `StatusFlag` to an `absl::Status` which is great - however with the optimization, if `b` is instantaneous we try to demote the result of `a` to `StatusFlag`, losing information. I'll need to consider how to change this optimization to preserve the final output type before rolling forward. Closes #38748 COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/38748 from ctiller:rb1 `743eb33bdf` PiperOrigin-RevId: 727109120	5 days ago
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core	Revert "[promises] Add an optimizer for `Seq`, `TrySeq` (#38445 )" (#38748 )	5 days ago

Craig Tiller 57a18b62ba Revert "[promises] Add an optimizer for `Seq`, `TrySeq` (#38445 )" (#38748 )

This reverts commit a7a650a74e.

Original PR breaks #38286 and I think the breakage is in the PR -- in a construct like:

```
TrySeq(
  /*a*/ []() -> Promise<absl::Status>,
  /*b*/ []() -> Promise<StatusFlag>,
  /*c*/ []() -> Promise<absl::Status>)
```

the original seq_state code would try to promote the intermediate `StatusFlag` to an `absl::Status` which is great - however with the optimization, if `b` is instantaneous we try to demote the result of `a` to `StatusFlag`, losing information.

I'll need to consider how to change this optimization to preserve the final output type before rolling forward.

Closes #38748

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/38748 from ctiller:rb1 743eb33bdf
PiperOrigin-RevId: 727109120

5 days ago

core Revert "[promises] Add an optimizer for `Seq`, `TrySeq` (#38445 )" (#38748 ) 5 days ago