Unique Globals Used/Set/Modified

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Unique Globals Used/Set/Modified is one of the source-code metrics Understand computes across 17+ languages — browse them in the GUI, export and track them, or script them with the Python API.

Metrics overview

Unique Globals Used/Set/Modified

API ID: CountGlobalsUsedSetModifiedUnique
Languages: C, C++, Pascal, Python, Web
Targets: Functions

The number of unique global objects used, set, and/or modified by this function

Example:

    int my_global = 10;
    void combined(int x)
    {
      int y, z;

      x ++;                //     Parameters do not count
      if (x > 10)          //     Parameters do not count
        x = 0;             //     Parameters do not count

      y ++;                //     Locals do not count
      if (y > 10)          //     Locals do not count
        y = 0;             //     Locals do not count

      my_global ++;        // + 1 Globals count
      if (my_global > 10)  //     Duplicates do not count
        my_global= 0;      //     Duplicates do not count
    }                      // CountGlobalsUsedSetModifiedUnique = 1

Compare to CountGlobalsUsedSetModified which counts all uses, sets, or modifications to global objects by this function.