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V2570. MISRA. Operands of the logical '…
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
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MISRA errors
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Contents

V2570. MISRA. Operands of the logical '&&' or the '||' operators, the '!' operator should have 'bool' type.

Dec 23 2019

This diagnostic rule is based on the software development guidelines developed by MISRA (Motor Industry Software Reliability Association).

This diagnostic rule applies only to code written in C++.

Using the logical operators '!', '&&', and '||' with variables of a type other than 'bool' is pointless; it does not seem to be the intended behavior and may be a sign of a mistake. The programmer probably intended to use a bitwise operator ('&', '|', or '~').

Example of non-compliant code:

void Foo(int x, int y, int z)
{
  if ((x + y) && z)
  {
    ....
  }
}

void Bar(int *x)
{
  if (!x)
  {
    ....
  }
}

Fixed code:

void Foo(int x, int y, int z)
{
  if ((x + y) & z)
  {
    ....
  }
}

void Foo(int x, int y, int z)
{
  if ((x < y) && (y < z))
  {
    ....
  }
}

void Bar(int *x)
{
  if (x == NULL)
  {
    ....
  }
}

This diagnostic is classified as:

  • MISRA-CPP-5.3.1
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