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V679. The 'X' variable was not initiali…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V679. The 'X' variable was not initialized. This variable is passed by a reference to the 'Foo' function in which its value will be utilized.

Oct. 4, 2013

The analyzer has detected an issue when an uninitialized variable is being passed into a function by reference or by pointer. The function tries to read a value from this variable.

Here is an example.

void Copy(int &x, int &y)
{
  x = y;
}
void Foo()
{
  int x, y;
  x = 1;
  Copy(x, y);
}

This is a very simple artificial sample, of course, but it explains the point very well. The 'y' variable is uninitialized. A reference to this variable is passed into the Copy() function which tries to read from this uninitialized variable.

The fixed code may look like this:

void Copy(int &x, int &y)
{
  x = y;
}
void Foo()
{
  int x, y;
  y = 1;
  Copy(x, y);
}

This diagnostic is classified as:

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