[clang-tools-extra] [clang-tidy] Fix false positive in bugprone-use-after-move for std::tie (PR #192895)

via cfe-commits cfe-commits at lists.llvm.org
Sun Apr 19 22:35:36 PDT 2026


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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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<details>
<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp clang-tools-extra/test/clang-tidy/checkers/bugprone/use-after-move.cpp --diff_from_common_commit
``````````

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The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
:warning:

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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp
index 92c4cc10c..04aa17fb4 100644
--- a/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp
@@ -138,10 +138,10 @@ makeReinitMatcher(const ValueDecl *MovedVariable,
                  // assignment writes back through the stored references.
                  binaryOperation(
                      hasOperatorName("="),
-                     hasLHS(callExpr(
-                         callee(functionDecl(hasName("::std::tie"))),
-                         hasAnyArgument(
-                             ignoringParenImpCasts(DeclRefMatcher))))),
+                     hasLHS(
+                         callExpr(callee(functionDecl(hasName("::std::tie"))),
+                                  hasAnyArgument(
+                                      ignoringParenImpCasts(DeclRefMatcher))))),
                  // Declaration. We treat this as a type of reinitialization
                  // too, so we don't need to treat it separately.
                  declStmt(hasDescendant(equalsNode(MovedVariable))),

``````````

</details>


https://github.com/llvm/llvm-project/pull/192895


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