Synopsis

(Required) Operands shall not be of an inappropriate essential type.

Enabled by default

Yes

Severity/Certainty

Medium/Medium

Full description

Shift and bitwise operations were found performed on operands of essentially signed type.

Coding standards

Code examples

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

void example(void) {
  int x = -(1U);

  x ^ 1;
  x & 0x7F;
  ((unsigned int)x) & 0x7F;
}

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

void example(void) {
  int x = -1;
  ((unsigned int)x) ^ 1U;
  2U ^ 1U;
  ((unsigned int)x) & 0x7FU;
  ((unsigned int)x) & 0x7FU;
}