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This content has been moved to \[[PRE02-A. Macro replacement lists should be parenthesized]\]. |
Compliant Solution
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#define JOIN(x, y) JOIN_AGAIN(x, y)
#define JOIN_AGAIN(x, y) x ## y
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JOIN(x, y) calls JOIN_AGAIN(x, y) so that, if x or y is a macro, they aree expanded before the ## operator pastes them together.
Risk Assessment
Recommendation | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
DCL03-A | 1 (low) | 1 (unlikely) | 1 (high) | P1 | L3 |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
References
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\[Saks 08] Dan Saks, Stephen C. Dewhurst. Presentation. Sooner Rather Than Later: Static Programming Techniques for C++.
\[[ISO/IEC 9899-1999|AA. C References#ISO/IEC 9899-1999]\] Section 6.10.3, "Macro replacement," Section 6.10.3.3, "The ## operator," and Section 6.10.3.4, "Rescanning and further replacement" |
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PRE04-A. Do not reuse a standard header file name 01. Preprocessor (PRE) PRE06-A. Enclose header file in an inclusion sandwich