Examples of errors detected by the V709 diagnostic

V709. Suspicious comparison found: 'a == b == c'. Remember that 'a == b == c' is not equal to 'a == b && b == c'.

Bullet Physics SDK

V709 Suspicious comparison found: 'f0 == f1 == m_fractureBodies.size()'. Remember that 'a == b == c' is not equal to 'a == b && b == c'. btFractureDynamicsWorld.cpp 483

 btAlignedObjectArray<btFractureBody*> m_fractureBodies; void btFractureDynamicsWorld::fractureCallback() { for (int i = 0; i < numManifolds; i++) { .... int f0 = m_fractureBodies.findLinearSearch(....); int f1 = m_fractureBodies.findLinearSearch(....); if (f0 == f1 == m_fractureBodies.size()) continue; .... } .... } 

Amazon Lumberyard

V709 CWE-682 Suspicious comparison found: 'a == b == c'. Remember that 'a == b == c' is not equal to 'a == b && b == c'. toglslinstruction.c 564

 void CallBinaryOp(....) { .... uint32_t src1SwizCount = GetNumSwizzleElements(....); uint32_t src0SwizCount = GetNumSwizzleElements(....); uint32_t dstSwizCount = GetNumSwizzleElements(....); .... if (src1SwizCount == src0SwizCount == dstSwizCount) // <= { .... } .... } 

Similar errors can be found in some other places:

• V709 CWE-682 Suspicious comparison found: 'a == b == c'. Remember that 'a == b == c' is not equal to 'a == b && b == c'. toglslinstruction.c 654
• V709 CWE-682 Suspicious comparison found: 'a == b == c'. Remember that 'a == b == c' is not equal to 'a == b && b == c'. toglslinstruction.c 469
• V709 CWE-682 Suspicious comparison found: 'a == b == c'. Remember that 'a == b == c' is not equal to 'a == b && b == c'. tometalinstruction.c 539

Unreal Engine 4

V709 Suspicious comparison found: 'a == b == c'. Remember that 'a == b == c' is not equal to 'a == b && b == c'. slatetextures.cpp 67

 void FSlateTexture2DRHIRef::InitDynamicRHI() { .... checkf(GPixelFormats[PixelFormat].BlockSizeX == GPixelFormats[PixelFormat].BlockSizeY == GPixelFormats[PixelFormat].BlockSizeZ == 1, TEXT("Tried to use compressed format?")); .... }