<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/131231>131231</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-tidy] Check request: Avoid assigning Boost lambda capturing `this` to a field in a default-copyable class.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-tidy
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          denzor200
      </td>
    </tr>
</table>

<pre>
    
Needs a check that will do all the same as https://github.com/llvm/llvm-project/issues/120863, but will catch a lambda from Boost library instead of C++11 lambda.

```
#include <boost/lambda2.hpp>
using namespace boost::lambda2;

struct test
{
 int x = 0;
    std::function<bool(int)> fun = x==_1; // INCORRECT
};
```

```
#include <boost/lambda2.hpp>
using namespace boost::lambda2;

struct test
{
    int x = 0;
 std::function<bool(int)> fun = x==_1; // OK, see copy methods deleted below

    test() = default;
    test(const test&) = delete;
    test& operator=(const test&) = delete;
};
```

Here I provided sample of using [Boost Lambda 2](https://www.boost.org/doc/libs/1_84_0/libs/lambda2/doc/html/lambda2.html) to capture `this`, but Boost is not limited to Lambda 2. There is also well-known [Boost Lambda](https://www.boost.org/doc/libs/1_84_0/doc/html/lambda.html) and [Boost Phoenix](https://www.boost.org/doc/libs/1_84_0/libs/phoenix/doc/html/index.html) and ??? but I have never used them and don't know if they are relevant to this problem.
So if anybody here is an expert on these two libraries(and not only) - feel free to comment.

</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzEVUuP2zYQ_jX0ZbAGRVqWfdDBjzW6aJEUae6LkTiy2FCkSlL2ur--oKR9ZJECRfcQgIAg6ePMN9-8MAR9tkQly_csPy5wiK3zpSL7t_OC80Xl1K1kfPeJSAVAqFuqv0FsMcJVGwPKARoDsSUI2BFggDbGPjC5Y-LExOmsYztUy9p1TJyMuTw_7nrv_qQ6MnHSIQwUmDhlgm_WkokDVMNsv8ZYt4BgsKsUQuNdB3vnQgSjK4_-BtqGSKjANXBgYs_EPstm-JLxXTprPh--Y0JqW5tBETB5qJKlRGiEi2Xb90zeM74bgrZnsNhR6LEmmIByx-RuxjK5n6yH6Ic6QqQQ04cifQZtIzwBk0fgExAAIEQ1mWgGW0ft7MTAMLHRNjKxZfIemsGO956YPDJ5fMyY3MMkJTx8Onz-8uX-8HV0dJwpvI3upwQL8IN4Pxzs519TIQQiqF1_g45i61QARYYiKajIuOtEKhEYGYkNE9vRoKIGBxNftZ__186Gmb5Yv4KTyffYNbiePEbnE7n_cPXfMvILeYIH6L27aEUq9UlvKNXrJDzL91NF_zbVuGB58vd9G12v1-WYl6XzZyZOytUplboa--Zxs3rkr-_PWXuGtbEzbxM_vm4hOqixj4MnYGseWx0S57n7Jko6gHWp1zqdRI_uheQSvrYpMB0ATXBwJWPuvll3te8D-v_h_ID9C3m06tXR760jq58-LFw_23nnWltFT997lqfpjFo9QIsXAksX8jCEJFRL3QhUzjJRREjKgG7SjxugJ_Bk6II2Jk2T9Kk-KkNdmll_uARFe0vTF15ktkBPPfkIziY7gSBe3TwHdRqgm-Qx5ctZc0tU76AhMtB4ojHbruvIxuRioUqptnKLCyqzYpVt-SrbrBdtWRd5kWWCN5ucb3mBJLkUqsBN0SCqWi10KbjIucykENlarJf5qqqwwO2qKfJqs0W24tShNss05pPqi3HAl5nMhMwWBisyYVw4QtQG7fkuanVjItX9wpfjcqiGc2ArbnSI4dVO1NGMq-rNtfwIh3EnefproHFuwe7itIJpt6UOmxfGVLlTyY-N91L0SRyERpNRoC3g8_y4S6MHK0NQGwxhuRi8KT-w3yYFLqX4JwAA__-UmFQc">