[clang] [llvm] [clang] Implement lifetime analysis for lifetime_capture_by(X) (PR #115921)

[Haojian Wu via cfe-commits]

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+// RUN: %clang_cc1 --std=c++20 -fsyntax-only -Wdangling -Wdangling-field -Wreturn-stack-address -verify %s
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+#include "Inputs/lifetime-analysis.h"
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hokein wrote:

In my experience, a single and well-organized test file works effectively, as it simplifies adding new test cases.
Having multiple files can add overhead, requiring extra effort to determine the right file for each new case. I generally prefer a workflow where new test cases are appended to one main file.

> I think it would be much more readable if we would have a namespace per use case or set of use cases where everything relevant to that use case would be declared/defined and used.

+1, I think the test can be improved by having a dedicated namespace per use case.



https://github.com/llvm/llvm-project/pull/115921