joshua-spacetime 5da08a3dbb [2.0 Breaking]: Remove sender field from [Reducer|View|Procedure]Context (#4208) ...

# Description of Changes

Makes the `sender` field on `ViewContext` private and exposes a
`sender()` method. Does the same for `ReducerContext` and
`ProcedureContext`.

The purpose of this change: So that the host can determine if/when a
view invokes or reads the `sender`.

Currently, because `sender` is a field, the host assumes that it is
always read. This means views must be materialized per client, even if
the view doesn't actually depend on `sender`, resulting in data
duplication.

The initial solution for this problem was `AnonymousViewContext` which
doesn't have a `sender` field. The better solution is to make `sender` a
method so that it can call into the host and record when it's actually
invoked.

Note, this patch only updates the module API, so the current
implementation does not change. `ViewContext` views are still duplicated
across clients. Changing this requires a new host syscall and for
`sender()` to invoke that syscall. This however is backwards compatible
and can be done anytime after the module APIs for the other languages
(C#, TypeScript, C++) are updated.

Also note that `ReducerContext` and `ProcedureContext` were updated
purely for consistency. There are currently no plans to track reads of
`sender` in these contexts.

# API and ABI breaking changes

Breaks the rust module api.

# Expected complexity level and risk

1

# Testing

N/A

2026-02-05 22:34:40 +00:00

..

lib.rs

[2.0 Breaking]: Remove sender field from [Reducer|View|Procedure]Context (#4208)

2026-02-05 22:34:40 +00:00