forked from OSchip/llvm-project
38 lines
1.0 KiB
ReStructuredText
38 lines
1.0 KiB
ReStructuredText
.. title:: clang-tidy - performance-move-const-arg
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performance-move-const-arg
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==========================
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The check warns
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- if ``std::move()`` is called with a constant argument,
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- if ``std::move()`` is called with an argument of a trivially-copyable type,
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- if the result of ``std::move()`` is passed as a const reference argument.
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In all three cases, the check will suggest a fix that removes the
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``std::move()``.
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Here are examples of each of the three cases:
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.. code-block:: c++
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const string s;
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return std::move(s); // Warning: std::move of the const variable has no effect
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int x;
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return std::move(x); // Warning: std::move of the variable of a trivially-copyable type has no effect
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void f(const string &s);
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string s;
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f(std::move(s)); // Warning: passing result of std::move as a const reference argument; no move will actually happen
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Options
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-------
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.. option:: CheckTriviallyCopyableMove
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If non-zero, enables detection of trivially copyable types that do not
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have a move constructor. Default is non-zero.
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