But it's also not marked at the implementation for HashMap's Index impl for inst... | Hacker News

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		the_mitsuhiko 18 days ago \| parent \| context \| favorite \| on: map::operator[] should be nodiscard But it's also not marked at the implementation for HashMap's Index impl for instance.

tialaramex 18 days ago [–]

This didn't seem like a footgun to me, hats["Jim"]; will panic if, in fact "Jim" isn't one of the keys, but what did the hypothetical author expect to happen when they write this? HashMap doesn't implement IndexMut so hats["Jim"] = 26; won't even compile.

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