org.sonar.l10n.java.rules.java.S881.html Maven / Gradle / Ivy

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Why is this an issue?
The use of increment and decrement operators in method calls or in combination with other arithmetic operators is not recommended, because:

   It can significantly impair the readability of the code. 
   It introduces additional side effects into a statement, with the potential for undefined behavior. 
   It is safer to use these operators in isolation from any other arithmetic operators. 

Noncompliant code example
u8a = ++u8b + u8c--;
foo = bar++ / 4;

Compliant solution
The following sequence is clearer and therefore safer:
++u8b;
u8a = u8b + u8c;
u8c--;
foo = bar / 4;
bar++;

Resources

   CERT, EXP30-C. - Do not depend on the order of evaluation for side effects 
   CERT, EXP50-CPP. - Do not depend on the order of evaluation for side effects 
   CERT, EXP05-J. - Do not follow a write by a subsequent write or read of the same
  object within an expression