All clear now, thanks! > -----Original Message----- > From: Interest <[email protected]> On Behalf Of Giuseppe > D'Angelo via Interest > Sent: Monday, 23 February 2026 12:23 > To: [email protected] > Subject: Re: [Interest] QFlags: Typesafe way to check "any flag set" > > CAUTION: External Sender > Stop. Review. Verify! Were you expecting this mail? > If you were not expecting this email, confirm with the sender through a > trusted channel (e.g., phone or Teams). > If suspicious, please report the mail, do not click on any links or open > attachments, and do not enter any ID or password. > > > > Il 23/02/26 11:52, Schimkowitsch Robert ha scritto: > > bool isAskingWhen(Question q) > > { > > return {q & QuestionFlag::When}; > > } > > > > As you can see in the CE link, this produces a "narrowing" warning, which I > want to avoid. > > > I guess you have a couple of options here, you could either: > > * not put braces at all, or use round braces instead of curly. Round braces > just > group the expression, and are even redundant here. > Round braces or not, the `q & QuestionFlag::When` expression has type > QFlags<X>, and it converts to bool via its implicit operator int(). > Curly braces instead trigger copy-list-initialization of the returned bool > again > via the implicit operator int(), but since int->bool is a narrowing > conversion, > and narrowing conversions are invalid in list initializations, then compiler > warns or rejects the code; or > > * use the slightly more expressive/verbose testFlag (or testAnyFlag depending > on your use case), e.g. > > return q.testFlag(QuestionFlag::When); > > > HTH, > -- > Giuseppe D'Angelo | [email protected] | Senior Software > Engineer KDAB (France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 > 84 08 53, > http://www.kd/ > ab.com%2F&data=05%7C02%7Crobert.schimkowitsch%40andritz.com%7Ca3 > 4ae40c78144eb1a92d08de72ce28ec%7C6785298fe857464b9b4b80717840263 > 2%7C1%7C0%7C639074426954119274%7CUnknown%7CTWFpbGZsb3d8eyJF > bXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiT > WFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=oMWgSci9oXCo%2F3k > kuXKQwNDNrrLU6JieVfll3iZvS7o%3D&reserved=0 > KDAB - Trusted Software Excellence ________________________________
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