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Defining an unnamed namespace within a header file can cause data integrity violations and performance problems but is unlikely to go unnoticed with sufficient testing. One-definition rule violations result in undefined behavior.
Rule | Severity | Likelihood | Detectable | RepairableRemediation Cost | Priority | Level |
|---|---|---|---|---|---|---|
DCL59-CPP | Medium | Unlikely | Yes | MediumNo | P4 | L3 |
Automated Detection
Tool | Version | Checker | Description | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Astrée |
| unnamed-namespace-header | Fully checked | ||||||||||||
| Axivion Bauhaus Suite |
| CertC++-DCL59 | |||||||||||||
| Clang |
| cert-dcl59-cpp | Checked by clang-tidy | ||||||||||||
| CodeSonar |
| LANG.STRUCT.DECL.ANH | Anonymous Namespace in Header File | ||||||||||||
| Helix QAC |
| C++2518 | |||||||||||||
| Klocwork |
| MISRA.NAMESPACE.UNMD | |||||||||||||
| LDRA tool suite |
| 286 S, 512 S | Fully implemented | ||||||||||||
| Parasoft C/C++test |
| CERT_CPP-DCL59-a | There shall be no unnamed namespaces in header files | ||||||||||||
| Polyspace Bug Finder |
| CERT C++: DCL59-CPP | Checks for unnamed namespaces in header files (rule fully covered) | ||||||||||||
| RuleChecker |
| unnamed-namespace-header | Fully checked | ||||||||||||
| SonarQube C/C++ Plugin |
| UnnamedNamespaceInHeader | PRQA QA-C++|||||||||||||
| PVS-Studio |
| PRQA QA-C++
| PRQA QA-C++
| 2518 | PRQA QA-C | 9.1 | 2518V1068 |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
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Bibliography
| [ISO/IEC 14882-2014] | Subclause 3.2, "One Definition Rule" |
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