LANG.STRUCT.CONDASSIG : Assignment in Conditional

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A condition contains an assignment.

This may indicate a typographical error, where the programmer actually intended to perform a comparison.

The assignment may be intentional, but prohibited by local coding standards that require that conditions not change the state of the program.

Class Name

Assignment in Conditional

Significance

style

Mnemonic

LANG.STRUCT.CONDASSIG

Categories

CWE	CWE:481	Assigning instead of Comparing
TS17961	TS17961:5.4-boolasgn	5.4. No assignment in conditional expressions
CERT-C	CERT-C:EXP45-C	Do not perform assignments in selection statements
JSF++	JSF++:160	An assignment expression shall be used only as the expression in an expression statement.

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += allow class="Assignment in Conditional"

void lang_struct_condassig(void)
{    
    int c;
    int tried[100];
    memset(tried, 0, 100 *sizeof(int));
    while (c = rand()%100 != 56) /* 'Assignment in Conditional' warning issued here */
        tried[c] = 1;
        /* ... */
}

The following configuration file parameters affect checks for this warning class.

LANG.STRUCT.CONDASSIG : Assignment in Conditional

Summary

Properties

Example

Relevant Configuration File Parameters