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Non-Compliant Code Example
It is common for C programmers to assign the return value of a function while concurrently checking for and in-band error condition.
| Code Block |
|---|
|
if(ret = foo() != err) {
/* use ret */
}
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However, since comparison binds tighter than assignment, the value of the comparison is stored in ret. So if foo() succeeds, ret will always be set to 0, and the if-statement will execute if and only if foo() fails, contrary to the expectation of the programmer.
Compliant Solution
| Code Block |
|---|
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if((ret = foo()) != err) {
/* use ret */
}
|
Exceptions
EXP00-EX1: Mathemtical expressions that follow algebraic order do not require parentheses. For instance, in the expression:
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