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CommonData: Add invertMap() function

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cameel 2020-01-29 17:37:10 +01:00
parent b6190e06a5
commit 9c8187bd29
1 changed files with 17 additions and 0 deletions
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17
libsolutil/CommonData.h
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@ -156,6 +156,23 @@ T convertContainer(U&& _from)
}; };
} }
/// Gets a @a K -> @a V map and returns a map where values from the original map are keys and keys
/// from the original map are values.
///
/// @pre @a originalMap must have unique values.
template <typename K, typename V>
std::map<V, K> invertMap(std::map<K, V> const& originalMap)
{
std::map<V, K> inverseMap;
for (auto const& [key, value]: originalMap)
{
assert(inverseMap.count(value) == 0);
inverseMap.insert({value, key});
}
return inverseMap;
}
// String conversion functions, mainly to/from hex/nibble/byte representations. // String conversion functions, mainly to/from hex/nibble/byte representations.
enum class WhenError enum class WhenError