Method sizeofVoid

lib/checksizeof.cpp:442–478

}

void CheckSizeofImpl::sizeofVoid()
{
    if (!mSettings.severity.isEnabled(Severity::portability))
        return;

    logChecker("CheckSizeof::sizeofVoid"); // portability

    for (const Token *tok = mTokenizer->tokens(); tok; tok = tok->next()) {
        if (Token::simpleMatch(tok, "sizeof ( void )")) {
            sizeofVoidError(tok);
        } else if (Token::simpleMatch(tok, "sizeof (") && tok->next()->astOperand2()) {
            const ValueType *vt = tok->next()->astOperand2()->valueType();
            if (vt && vt->type == ValueType::Type::VOID && vt->pointer == 0U)
                sizeofDereferencedVoidPointerError(tok, tok->strAt(3));
        } else if (tok->str() == "-") {
            // only warn for: 'void *' - 'integral'
            const ValueType *vt1  = tok->astOperand1() ? tok->astOperand1()->valueType() : nullptr;
            const ValueType *vt2  = tok->astOperand2() ? tok->astOperand2()->valueType() : nullptr;
            const bool op1IsvoidPointer = (vt1 && vt1->type == ValueType::Type::VOID && vt1->pointer == 1U);
            const bool op2IsIntegral    = (vt2 && vt2->isIntegral() && vt2->pointer == 0U);
            if (op1IsvoidPointer && op2IsIntegral)
                arithOperationsOnVoidPointerError(tok, tok->astOperand1()->expressionString(), vt1->str());
        } else if (Token::Match(tok, "+|++|--|+=|-=")) { // Arithmetic operations on variable of type "void*"
            const ValueType *vt1 = tok->astOperand1() ? tok->astOperand1()->valueType() : nullptr;
            const ValueType *vt2 = tok->astOperand2() ? tok->astOperand2()->valueType() : nullptr;

            const bool voidpointer1 = (vt1 && vt1->type == ValueType::Type::VOID && vt1->pointer == 1U);
            const bool voidpointer2 = (vt2 && vt2->type == ValueType::Type::VOID && vt2->pointer == 1U);

            if (voidpointer1)
                arithOperationsOnVoidPointerError(tok, tok->astOperand1()->expressionString(), vt1->str());

            if (!tok->isAssignmentOp() && voidpointer2)
                arithOperationsOnVoidPointerError(tok, tok->astOperand2()->expressionString(), vt2->str());
        }
    }
}

void CheckSizeofImpl::sizeofVoidError(const Token *tok)
{