Synopsis

A negative signed integer is implicitly cast to an unsigned integer.

Enabled by default

Yes

Severity/Certainty

Medium/Medium

Full description

A negative signed integer is implicitly cast to an unsigned integer. The result of this cast will be a large integer, and using this value might result in unexpected behavior.

Coding standards

Code examples

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

void example(void) {
  int a = -10;
  unsigned int b = a;
}

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

void example(void) {
  int a = 10;
  unsigned int b = a;
}