JavaScript is not currently enabled, but is required for full CodeSonar manual search and browse functionality.
If you are viewing this file in your hub's Web GUI, enable JavaScript in your browser: you will also need it for GUI functionality.
If you opened this file directly from disk, your browser may be directly suppressing JavaScript functionality: certain browsers perform this suppression on local files (but not files delivered by web servers) for security reasons.
| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
An object (variable or field) declaration explicitly specifies the alignment is zero.
Specifically, a warning of this class will be triggered when the operand to _Alignas or alignas is a zero-valued integer constant expression. The C standard specifies that the specifier has no effect in this case, so it is redundant and can be removed from the code.
This class is a strict subset of Use of Alignas.
| Class Name | Explicit Zero Alignment | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | redundancy | |||||||||||||||||||||||||||||||||
| Mnemonic | LANG.STRUCT.ALIGNAS.EZA | |||||||||||||||||||||||||||||||||
| Categories |
|
|||||||||||||||||||||||||||||||||
| 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="Explicit Zero Alignment" |
#include <stdalign.h> alignas(0) int explicit_zero; /* 'Explicit Zero Alignment' warning issued here * ('Use of Alignas' warning also issued when enabled) */ alignas(4-4) int explicit_0exp; /* 'Explicit Zero Alignment' warning issued here * ('Use of Alignas' warning also issued when enabled) */ alignas('\0') int explicit_0char; /* 'Explicit Zero Alignment' warning issued here * ('Use of Alignas' warning also issued when enabled) */ int implicit_zero; /* ok: no explicit alignment (default alignment is 0) */ alignas(4) int explicit_four; /* ok: explicit non-zero alignment * ('Use of Alignas' warning issued when enabled) */ alignas(long int) int explicit_long_int; /* ok: explicit non-zero alignment * ('Use of Alignas' warning issued when enabled) */
The following configuration file parameters affect checks for this warning class.
Japanese (ja)