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Merge pull request #13762 from xokdvium/delete-footguns

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libutil: Delete footgun overloads of get and getOr
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Sergei Zimmerman 2025-08-15 17:58:32 +03:00 • committed by GitHub
commit 22378ea093
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src/libutil/include/nix/util/util.hh
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@ -214,6 +214,10 @@ typename T::mapped_type * get(T & map, const typename T::key_type & key)
return &i->second;
}
/** Deleted because this is use-after-free liability. Just don't pass temporaries to this overload set. */
template<class T>
typename T::mapped_type * get(T && map, const typename T::key_type & key) = delete;
/**
* Get a value for the specified key from an associate container, or a default value if the key isn't present.
*/
@ -227,6 +231,11 @@ getOr(T & map, const typename T::key_type & key, const typename T::mapped_type &
return i->second;
}
/** Deleted because this is use-after-free liability. Just don't pass temporaries to this overload set. */
template<class T>
const typename T::mapped_type &
getOr(T && map, const typename T::key_type & key, const typename T::mapped_type & defaultValue) = delete;
/**
* Remove and return the first item from a container.
*/