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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`DIR-15-8-1`:  move assignment self-assignment false positive","articleBody":"### Affected rules\n - `DIR-15-8-1`\n\n### Description\n\nUsing the \"move-and-swap idiom\" proposed in the directive's example as a solution to address potential issues with self-assignment leads to an alert.\n\n### Example\n```cpp\n#include \u003cutility\u003e\n\nclass resource_manager {\n  public:\n    resource_manager() = default;\n    ~resource_manager() = default;\n    resource_manager(resource_manager const\u0026) = delete;\n    resource_manager(resource_manager\u0026\u0026) = default;\n    resource_manager\u0026 operator=(resource_manager const\u0026) = delete;\n    resource_manager\u0026 operator=(resource_manager\u0026\u0026 other) \u0026 noexcept {\n        resource_manager temp{std::move(other)};\n        std::swap(resource_, temp.resource_);\n        return *this;\n    }\n  private:\n    using resource = int;\n    resource resource_;\n};\n\nint main() {}\n```\nI am getting a\n```\n\"DIR-15-8-1: User-provided copy assignment operators and move assignment operators shall handle self-assignment\",\"User-provided copy assignment operators and move assignment operators shall handle self-assignment.\",\"error\",\"User defined copy or user defined move does not handle self-assignment correctly.\",\"/main.cpp\",\"10\",\"23\",\"10\",\"31\"\n```\nwhen analyzing with `cpp/misra/src/rules/DIR-15-8-1/CopyAndMoveAssignmentsShallHandleSelfAssignment.ql`.","author":{"url":"https://github.com/fjatWbyT","@type":"Person","name":"fjatWbyT"},"datePublished":"2025-04-24T11:04:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/889/codeql-coding-standards/issues/889"}