LANG.STRUCT.DECL.ARRAY : Use of Array Type

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CodeSonar^® 9.2p0

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C and C++

LANG.STRUCT.DECL.ARRAY : Use of Array Type

Summary

A variable is declared with C-style array type.

Exception: a defining declaration that initializes a const char[] variable with a string literal will not trigger a warning of this class.

Properties

Class Name

Use of Array Type

Significance

style

Mnemonic

LANG.STRUCT.DECL.ARRAY

Categories

MisraC++2023	MisraC++2023:11.3.1	Variables of array type should not be declared

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="Use of Array Type"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

If you prefer to enable this class for C++ code only, add language=c++ to your WARNING_FILTER rule:

WARNING_FILTER += allow class="Use of Array Type" language=c++

Example

#include <array>

typedef int unused_intarr_t[4];                      // type not used: no associated warnings
typedef int intarr_t[4];                             // type is used: warning issued at use (below)

const char cchar_arr[] = "special case";          // const char[] immediately initialized with string literal
char nc_char_arr[] = "not const";    // 'Use of Array Type' warning issued here

void use_of_array( int arrparam[4] ){                // decays to int* ('Array Parameter' warning issued here)
    int bad1[10];                    // 'Use of Array Type' warning issued here
    intarr_t bad2;                   // 'Use of Array Type' warning issued here
    std::array<int, 10> good;                        // ok - uses std::array rather than C-style array
}

Relevant Configuration File Parameters

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

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