P1317R2 Remove Return Type Deduction In `apply()`
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cxx26
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Description
WG21-P1317R2 Remove Return Type Deduction In apply()
LWG-4567 Feature-test macro value for apply_result, is_applicable
INCREASED feature-test macro (thanks @frederick-vs-ja), note that LWG-4567 further increased it to 202603L for WG21-P2996R13 patched by WG21-P3795R2 all tracked by #5606:
#define __cpp_lib_apply 202506L
Note: We are not yet accepting PRs for C++26 features.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading WG21-P1317R2, the LWG-4567 note, and the related tracking issue #5606. The issue provides no source files or tests; completion would need to align apply() and the listed feature-test macro with the referenced standard changes, though the issue says C++26 feature PRs are not yet being accepted.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- devtools
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 20/100