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Merge pull request #13763 from obsidiansystems/more-flexible-get

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More flexible typing for `get` in `util.hh`
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Sergei Zimmerman 2025-08-15 22:09:57 +03:00 • committed by GitHub
commit 1ed3ae8a9d
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1 changed files with 6 additions and 7 deletions
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13
src/libutil/include/nix/util/util.hh
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@ -196,8 +196,8 @@ std::pair<std::string_view, std::string_view> getLine(std::string_view s);
/** /**
* Get a value for the specified key from an associate container. * Get a value for the specified key from an associate container.
*/ */
template<class T> template<class T, typename K>
const typename T::mapped_type * get(const T & map, const typename T::key_type & key) const typename T::mapped_type * get(const T & map, K & key)
{ {
auto i = map.find(key); auto i = map.find(key);
if (i == map.end()) if (i == map.end())
@ -205,8 +205,8 @@ const typename T::mapped_type * get(const T & map, const typename T::key_type &
return &i->second; return &i->second;
} }
template<class T> template<class T, typename K>
typename T::mapped_type * get(T & map, const typename T::key_type & key) typename T::mapped_type * get(T & map, K & key)
{ {
auto i = map.find(key); auto i = map.find(key);
if (i == map.end()) if (i == map.end())
@ -221,9 +221,8 @@ typename T::mapped_type * get(T && map, const typename T::key_type & key) = dele
/** /**
* Get a value for the specified key from an associate container, or a default value if the key isn't present. * Get a value for the specified key from an associate container, or a default value if the key isn't present.
*/ */
template<class T> template<class T, typename K>
const typename T::mapped_type & const typename T::mapped_type & getOr(T & map, K & key, const typename T::mapped_type & defaultValue)
getOr(T & map, const typename T::key_type & key, const typename T::mapped_type & defaultValue)
{ {
auto i = map.find(key); auto i = map.find(key);
if (i == map.end()) if (i == map.end())