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V671. It is possible that the 'swap' fu…
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

V671. It is possible that the 'swap' function interchanges a variable with itself.

April 29, 2013

The analyzer has detected a potential error that may occur when calling the 'swap' function. The function receives identical actual arguments, which is very strange. The programmer must have made a misprint.

Have a look at this example:

int arg1, arg2;
....
swap(arg1, arg1);
....

A misprint causes the swap() function to swap the value of the 'arg1' variable for itself. The code should be fixed in the following way:

swap(arg1, arg2);

The following sample is also considered suspicious:

MyClass arg1, arg2;
....
arg1.Swap(arg1);
....

It can be fixed in the following way:

arg1.Swap(arg2);

This diagnostic is classified as:

You can look at examples of errors detected by the V671 diagnostic.

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