Cyclomatic Complexity¶

Cyclomatic complexity is determined by the number of decision points in a method plus one for the method entry. The decision points are ‘if’, ‘for’, ‘for-each’, ‘while’, ‘do’, ‘catch’, ‘case’, ‘&&’, ‘||’ and ‘?:’.

Parameters¶

CYCLOMATIC_COMPLEXITY: threshold for max allowed cyclomatic complexity, default is 7.

Examples¶

Too Many Dicision Points¶

- (void)foo:(int)bar {              // + 1
  if (bar != 0) {                   // + 1
    while (YES) {                   // + 1
      switch (bar) {
        case 1:                     // + 1
          [self soSomething];
          break;
        case 2:                     // + 1
          [self doSomethingElse];
          break;
        case 3:                     // + 1
          [self nothingToDo];
          break;
        default:
          [self huh];
          break;
      }
      int b = (0 && 1) ? 2 : 3;     // + 2
      for (int i = 0; i < 0; i++) { // + 1
        [self neverReachHere];
      }
    }
  }
}