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Webinar: C++ semantics - 06.11

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Examples of errors detected by the V309…

Examples of errors detected by the V3092 diagnostic

V3092. Range intersections are possible within conditional expressions.


Mono

V3092 Range intersections are possible within conditional expressions. Example: if (A > 0 && A < 5) { ... } else if (A > 3 && A < 9) { ... }. mcs-net_4_x codegen.cs 742


public void EmitLong (long l)
{
  if (l >= int.MinValue && l <= int.MaxValue) {
    EmitIntConstant (unchecked ((int) l));
    ig.Emit (OpCodes.Conv_I8);
  } else if (l >= 0 && l <= uint.MaxValue) {
    EmitIntConstant (unchecked ((int) l));
    ig.Emit (OpCodes.Conv_U8);
  } else {
    ig.Emit (OpCodes.Ldc_I8, l);
  }
}

Similar errors can be found in some other places:

  • V3092 Range intersections are possible within conditional expressions. Example: if (A > 0 && A < 5) { ... } else if (A > 3 && A < 9) { ... }. I18N.CJK-net_4_x CP51932.cs 437
  • V3092 Range intersections are possible within conditional expressions. Example: if (A > 0 && A < 5) { ... } else if (A > 3 && A < 9) { ... }. I18N.CJK-net_4_x CP932.cs 552
  • V3092 Range intersections are possible within conditional expressions. Example: if (A > 0 && A < 5) { ... } else if (A > 3 && A < 9) { ... }. I18N.CJK-net_4_x ISO2022JP.cs 460

RunUO

V3092 Range intersections are possible within conditional expressions. Example: if (A > 0 && A < 5) { ... } else if (A > 3 && A < 9) { ... }. HouseFoundation.cs 1883


public static bool IsFixture( int itemID )
{
  ....
  else if( itemID >= 0x319C && itemID < 0x31B0 )
    return true;
  // ML doors
  else if( itemID == 0x2D46 ||
           itemID == 0x2D48 ||
           itemID == 0x2FE2 ||
           itemID == 0x2FE4 )
    return true;
  else if( itemID >= 0x2D63 && itemID < 0x2D70 )
    return true;
  else if( itemID >= 0x319C && itemID < 0x31AF )
    return true;
  ....
}