Main Content

MISRA C++:2008 Rule 3-9-2

typedefs that indicate size and signedness should be used in place of the basic numerical types

expand all in page

Description

Rule Definition

typedefs that indicate size and signedness should be used in place of the basic numerical types.

Rationale

When the amount of memory being allocated is important, using specific-length types makes it clear how much storage is being reserved for each object.

Polyspace Implementation

The rule checker does not raise violations in templates that are not instantiated.

Troubleshooting

If you expect a rule violation but Polyspace® does not report it, see Diagnose Why Coding Standard Violations Do Not Appear as Expected.

Examples

expand all

typedef unsigned int uint32_t;

unsigned int x = 0;       //Noncompliant
uint32_t y = 0;  //Compliant

In this example, the declaration of x is noncompliant because it uses the basic type int directly.

Check Information

Group: Basic Concepts
Category: Advisory

Version History

Introduced in R2013b

See Also

Topics