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(See also undefined behavior 1514 of Annex J.)
Further, according to subclause 6.4.2.1,
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(See also undefined behavior 3130 of Annex J.)
Identifiers in mutually visible scopes must be deemed unique by the compiler to prevent confusion about which variable or function is being referenced. Implementations can allow additional nonunique characters to be appended to the end of identifiers, making the identifiers appear unique while actually being indistinguishable.
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Search for vulnerabilities resulting from the violation of this rule on the CERT website.
Related Guidelines
| ISO/IEC TR 24772:2013 | Choice of Clear Names [NAI] Identifier Name Reuse [YOW] |
| MISRA C:2012 | Rule 5.1 (required) |
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