SPICE-0029: Self Type - #32
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bioball
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bioball
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There's a fair bit left to define about what the this type means; e.g.
- in object body param (
foo { bar: this -> }) (should be the outer enclosing object, not the inner object!) - inside object inside class body (
class Foo { obj { local bar: this = ... } }) - in let expression (
let (foo: this) ...) - in for generator (
for (foo: this in bar)) - in annotation
@this { foo = ... } - explicit new expr (
new this {})
Do you mind going through the grammar and detailing each of these scenarios?
Also: maybe we can structure this SPICE by talking about what this means in different parts of the grammar.
Then, note about resolving to the visibly outer scope can be a sub-bullet point of type test/type cast expressions I think.
| === Semantics | ||
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| The `this` type is an alias for the class of the current receiver (`this` value). | ||
| For open classes, `this` admits values whose class is a subclass of the receiver. |
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| For open classes, `this` admits values whose class is a subclass of the receiver. | |
| For open or abstract classes, `this` is the specific subclass of that class |
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