SmolStr is a string type that has the following properties:
size_of::<SmolStr>() == size_of::<String>()
- Strings are stack-allocated if they are:
- Up to 22 bytes long
- Longer than 22 bytes, but substrings of
src/lib.rs). Such strings consist solely of consecutive newlines, followed by consecutive spaces
- If a string does not satisfy the aforementioned conditions, it is heap-allocated
SmolStr is immutable. The primary use case for
SmolStr is a good enough default storage for tokens of typical programming
languages. Strings consisting of a series of newlines, followed by a series of
whitespace are a typical pattern in computer programs because of indentation.
Note that a specialized interner might be a better solution for some use cases.