Implement P2674R1 `is_implicit_lifetime` for MSVC and EDG
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compiler
enhancement
- Dominant language
- C++
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- Avg merge
- 4d 15h
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Description
Followup to #3445.
#5445 implemented WG21-P2674R1 is_implicit_lifetime for Clang 20, and #6095 extended it to MSVC Compiler 19.51.
When the necessary builtin becomes available for EDG, we should finish the implementation.
On 2026-03-03, VS-PR-713693 fixed VSO-2581623 "EDG should implement __builtin_is_implicit_lifetime".
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 comparing the Clang 20 implementation in #5445 with the MSVC Compiler 19.51 extension in #6095, then verify the EDG builtin described in VS-PR-713693. Complete the WG21-P2674R1 implementation for EDG, with the work done when is_implicit_lifetime is supported there.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100