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Feature: when_any #101

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Feature: when_any #101

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cbd53b1
Add when_any combinator for racing concurrent tasks with first-comple…
mvandeberg Jan 21, 2026
821f288
Fix use-after-free in when_any
mvandeberg Jan 21, 2026
72701ac
Improve when_any documentation
mvandeberg Jan 21, 2026
3f5a249
Simplify UAF bugfix and document critical sections
mvandeberg Jan 21, 2026
520d073
Add comprehensive docstring coverage to when_any.hpp for all types, m…
mvandeberg Jan 21, 2026
b980f91
Fix template params from refactor and expand documentation
mvandeberg Jan 22, 2026
b87baa0
Lazy initialize variant result
mvandeberg Jan 22, 2026
f3c24f1
Document memory model synchronization and fix homogeneous result storage
mvandeberg Jan 22, 2026
f4e2fc2
Fix IoAwaitable template arguments and consolidate test utilities
mvandeberg Jan 22, 2026
82c2d70
Cleanup noexcept use in when_any
mvandeberg Jan 22, 2026
0bfcedd
Remove duplicate queuing_executor
mvandeberg Jan 23, 2026
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1 change: 1 addition & 0 deletions doc/modules/ROOT/nav.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
** xref:coroutines/tasks.adoc[Tasks]
** xref:coroutines/launching.adoc[Launching Tasks]
** xref:coroutines/when-all.adoc[Concurrent Composition]
** xref:coroutines/when-any.adoc[Racing Tasks]
** xref:coroutines/affinity.adoc[Executor Affinity]
** xref:coroutines/cancellation.adoc[Cancellation]
* Execution
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3 changes: 2 additions & 1 deletion doc/modules/ROOT/pages/coroutines/when-all.adoc
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Expand Up @@ -242,7 +242,7 @@ Use `when_all` when:
Do NOT use `when_all` when:

* Operations depend on each other — use sequential `co_await`
* You need results as they complete — consider `when_any` (not yet available)
* You need only the first result — use xref:when-any.adoc[when_any]
* Memory is constrained — concurrent tasks consume more memory

== Summary
Expand All @@ -269,6 +269,7 @@ Do NOT use `when_all` when:

== Next Steps

* xref:when-any.adoc[Racing Tasks] — Return first completion with `when_any`
* xref:cancellation.adoc[Cancellation] — Stop token propagation
* xref:../execution/thread-pool.adoc[Thread Pool] — Multi-threaded execution
* xref:affinity.adoc[Executor Affinity] — Control where tasks run
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