Index: clang-tidy/bugprone/StringIntegerAssignmentCheck.cpp
===================================================================
--- clang-tidy/bugprone/StringIntegerAssignmentCheck.cpp
+++ clang-tidy/bugprone/StringIntegerAssignmentCheck.cpp
@@ -29,7 +29,9 @@
               hasTemplateArgument(0, refersToType(qualType().bind("type"))))))),
           hasArgument(1,
                       ignoringImpCasts(expr(hasType(isInteger()),
-                                            unless(hasType(isAnyCharacter())))
+                                            unless(hasType(isAnyCharacter())),
+                                            // Do not warn if assigning e.g. `CodePoint` to `basic_string<CodePoint>`
+                                            unless(hasType(type(equalsBoundNode("type")))))
                                            .bind("expr"))),
           unless(isInTemplateInstantiation())),
       this);