Synopsis

(Required) A bit-field shall have an appropriate type

Enabled by default

Yes

Severity/Certainty

Medium/High

Full description

Types with implementation defined sign like char or enums without underlying type shall not be used for bit-fields to avoid implementation defined behavior.

Coding standards

This check does not correspond to any coding standard rules.

Code examples

The following code example fails the check and will give a warning:

struct example
{
  char a : 2; // Non-compliant
  char b : 2; // Non-compliant
};

The following code example passes the check and will not give a warning about this issue:

#include <cstdint>

struct example
{
  std::uint8_t a : 2; // Compliant
  std::uint8_t b : 2; // Compliant
};