C and C++


LANG.TYPE.RESTRICT : Restrict Qualifier Used

Summary

A function parameter is restrict-qualified.

Note that C90 does not include the restrict keyword at all, and neither does the C++ standard.

Properties

Class Name Restrict Qualifier Used
Significance style
Mnemonic LANG.TYPE.RESTRICT
Categories
MisraC2023 MisraC2023:8.14 The restrict type qualifier shall not be used
Misra2012 Misra2012:8.14 The restrict type qualifier shall not be used
TS17961 TS17961:5.32-restrict 5.32. Passing pointers into the same object as arguments to different restrict-qualified parameters
CERT-C CERT-C:EXP43-C Avoid undefined behavior when using restrict-qualified pointers
Availability Available for C and C++.
Enabling Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.
RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Restrict Qualifier Used"
Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Example

typedef struct point {int *x; int *y;} mypoint;

void LANG_TYPE_RESTRICT(mypoint * restrict p){ /* 'Restrict Qualifier Used' warning issued here */               
  /* ... */
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.