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In this noncompliant code example, an assignment expression is the outermost expression in an if statement.:

if (a = b) {
  /* ... */
}

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When the assignment of b to a is not intended, this conditional block is now executed when a is equal to b.:

if (a == b) {
  /* ... */
}

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In this noncompliant example, the expression x = y is used as the controlling expression of the while statement.:

 do { /* ... */ } while ( foo(), x = y ) ;

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When the assignment of y to x is not intended, this conditional block is now executed when x is equal to y.:

do { /* ... */ } while ( foo(), x == y ) ; 

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In this noncompliant example, the expression p = q is used as the controlling expression of the while statement.:

 do { /* ... */ } while ( x = y, p = q ) ;

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This is a compliant example because the expression x = y is not used as the controlling expression of the while statement.:

do { /* ... */ } while ( x = y, p == q ) ; 

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In this compliant example, the expression x = y  is itself a parameter to a comparison operation. :

if ( ( x = y )  != 0  ) { /* ... */ } 

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In this compliant example, the expression  x = y is a single primary expression.:

if ( ( x = y ) ) { /* ... */ } 

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In this compliant example, the expression x = y is used in a function argument.:

if ( foo( x = y ) ) { /* ... */ } 

if ( ( v = w ) && flag ) { /* ... */ }

if ( ( v == w ) && flag ) { /* ... */ }; 

if ( ( (v = w) != 0 ) && flag ) { /* ... */ };

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Related Vulnerabilities

Search for vulnerabilities resulting from the violation of this rule on the CERT website.

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