This library defines strings with copy-on-write semantics.

CowStr

Is a String that can be initialized to a static string or be build dynamically. Its contents can then be immutably shared. When mutation is required the string will be copied first.

CowStr implements many of the std::String methods. Missing methods will be added as required, PR's are welcome.

SubStr

Refers to an immutable slice inside of a CowStr. This resembles the &str/String relationship.

Features

• multithreaded using 'parking_lot' for mutexes and atomics. This is the default.

When multithreaded is explicitly disabled a ligher Cell based reference counting and no Mutexes are used. This singlethreaded variant should only be used for applications that are designed to be single threaded on architectures where atomics are expensive.