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More flexible typing for get in util.hh

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This is good for e.g. `std::string_view` and `StringMap`.

Needed by #11139

Co-authored-by: Sergei Zimmerman <145775305+xokdvium@users.noreply.github.com>
This commit is contained in:
John Ericson 2025-05-23 15:29:55 -04:00 • committed by John Ericson
parent 22378ea093
commit 0ef818dd92
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.
*/
template<class T>
const typename T::mapped_type * get(const T & map, const typename T::key_type & key)
template<class T, typename K>
const typename T::mapped_type * get(const T & map, K & key)
{
auto i = map.find(key);
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;
}
template<class T>
typename T::mapped_type * get(T & map, const typename T::key_type & key)
template<class T, typename K>
typename T::mapped_type * get(T & map, K & key)
{
auto i = map.find(key);
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.
*/
template<class T>
const typename T::mapped_type &
getOr(T & map, const typename T::key_type & key, const typename T::mapped_type & defaultValue)
template<class T, typename K>
const typename T::mapped_type & getOr(T & map, K & key, const typename T::mapped_type & defaultValue)
{
auto i = map.find(key);
if (i == map.end())