Removed unnecessary std::move, fixes #533#540
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Summary of ChangesHello @liuzicheng1987, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request addresses an identified issue by removing an unnecessary Highlights
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Code Review
This pull request correctly removes an unnecessary std::move. While the change is correct, there's an opportunity to further improve performance by enabling move semantics to avoid a string copy. I've left a specific suggestion to illustrate this.
| size_t _err_limit = 10) { | ||
| if (_errors.size() == 1) { | ||
| return std::move(_errors[0].what()); | ||
| return _errors[0].what(); |
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You are correct that std::move was unnecessary on the result of what(), as _errors[0].what() resolves to the const & overload, returning a const std::string&. Moving from a const reference results in a copy.
However, since _errors is passed by value, we can move from its elements. By moving from the Error object itself, you can invoke the &&-qualified overload of what(), which moves the string instead of copying it. This is more efficient.
| return _errors[0].what(); | |
| return std::move(_errors[0]).what(); |
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