MISRA C:2023 Rule 20.5

#undef should not be used

Since R2024a

Description

Rule Definition

#undef should not be used.

Rationale

#undef can make the software unclear which macros exist at a particular point within a translation unit.

Troubleshooting

If you expect a rule violation but do not see it, refer to Diagnose Why Coding Standard Violations Do Not Appear as Expected.

Check Information

Group: Preprocessing Directives

Category: Advisory

AGC Category: Readability

Version History

Introduced in R2024a