SumType is a generic sum type for modern D. It is meant as an
alternative to
`std.variant.Algebraic`.
Features:
- Pattern matching, including support for structural matching
(★)
- Self-referential types, using `This`
- Works with pure, @safe, @nogc, and immutable (★)
- Zero runtime overhead compared to hand-written C
- No heap allocation
- Does not rely on runtime type information (`TypeInfo`) (★)
Starred features (★) are those that are missing from `Algebraic`.
Code examples are available in the documentation (linked below).
New since the last announced version, 0.7.0:
- SumType now accepts non-copyable types as members.
- A new template, `canMatch`, allows querying the matching
logic directly.
- A bug in the `==` operator of self-referential SumTypes has
been fixed.
- An exception-safety bug in SumType's assignment operator has
been fixed.
- The documentation and examples have been given some
additional polish.
Special thanks to Atila Neves and John Colvin for their
contributions to this
release.
Links:
- Documentation: https://pbackus.github.io/sumtype/sumtype.html
- DUB: https://sumtype.dub.pm
- Github: https://github.com/pbackus/sumtype
