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EXP18-EX3: Assignment can be used in the above contexts if it occurs in a function argument or array index. In this compliant example, the expression x = y is used in a function argument:
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if ( foo( x = y ) ) { /* ... */ } |
This is a noncompliant example because && is not a comparison or relational operator and the entire expression is not primary:
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if ( ( v = w ) && flag ) { /* ... */ } |
When the assignment of v to w is not intended, this conditional block is now executed when v is equal to w:
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if ( ( v == w ) && flag ) { /* ... */ };
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When the assignment is intended, the following is an alternative compliant solution:
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if ( ( (v = w) != 0 ) && flag ) { /* ... */ }; |
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