1.. title:: clang-tidy - misc-confusable-identifiers 2 3misc-confusable-identifiers 4=========================== 5 6Warn about confusable identifiers, i.e. identifiers that are visually close to 7each other, but use different Unicode characters. This detects a potential 8attack described in `CVE-2021-42574 <https://www.cve.org/CVERecord?id=CVE-2021-42574>`_. 9 10Example: 11 12.. code-block:: text 13 14 int fo; // Initial character is U+0066 (LATIN SMALL LETTER F). 15 int ��o; // Initial character is U+1D41F (MATHEMATICAL BOLD SMALL F) not U+0066 (LATIN SMALL LETTER F). 16