unreadVariable for array member

[fenugrec]

Hi,
not sure if this is realistic to fix. Strictly speaking, the variable is used but only indirectly, via a struct that holds a pointer to the array.

//cppcheck 2.8.
//cppcheck test.c --enable=style
// =>    style: Variable 'txdata[0]' is assigned a value that is never used. [unreadVariable]

struct msg {
    char    *data;
};

//this next line is optional and changes nothing
extern void sendstuff(struct msg *txmsg);

void main(void) {
    struct msg txmsg;
    char txdata[2];
    txmsg.data = txdata;

    txdata[0]=0x55;
    //this next line is optional and changes nothing
    sendstuff(&txmsg);
}

[Daniel Marjamäki]

Thanks! I definitely consider this as a false positive we should fix.

I have created ticket: https://trac.cppcheck.net/ticket/11139