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89a829b8c7
This proposal describes `where` clauses that can add constraints on a type-of-type, for example define restrictions on its associated types. Example:
```
fn FindFirstPrime[T:! Container where .Element = i32]
(c: T) -> Optional(i32) {
// The elements of `c` have type `T.Element`, which is `i32`.
...
}
fn PrintContainer[T:! Container where .Element is Printable](c: T) {
// The type of the elements of `c` is not known, but we do know
// that type satisfies the `Printable` interface.
...
}
```
Some other constraints, such as `Sized` are defined as type-of-types directly, possibly parameterized.
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
Generics
This directory contains the collection of documents describing the generics feature of Carbon:
- Overview - A high-level description of the generics design, with pointers to other design documents that dive deeper into individual topics.
- Goals - The motivation and principles guiding the design direction.
- Terminology - A glossary establishing common terminology for describing the design.
- Detailed design - In depth description of how generic type parameters work.
Rejected alternatives- not implemented yet