NestedStatements.md

Control flow statements should not be nested too deep (NestedStatements)

Description

Nested "If, "For", "For Each", "While" and "Try" operators are the key ingredients for creating so-called "spaghetti code".

Such code is hard for reading, refactoring and support.

Examples

Incorrect

If Something Then                  // Allowed - level = 1
  /* ... */
  If Some Then             // Allowed - level = 2
    /* ... */
    For Num = 0 To 10 Do          // Allowed - level = 3
      /* ... */
      If OneMoreCondition Then     // Acceptable - level = 4, limit is reached, not yet breached
        If SomethingElse Then        // Level = 5, Limit is breached
          /* ... */
        EndIf;
        Return;
      EndIf;
    EndDo;
  EndIf;
EndIf;

Sources

• RSPEC-134