lean4-htt/tests/lean/interactive/structNameParentProj.lean
Kyle Miller 7557542bc2
feat: make structure parent projections nameable (#7100)
This PR modifies the `structure` syntax so that parents can be named,
like in
```lean
structure S extends toParent : P
```
**Breaking change:** The syntax is also modified so that the resultant
type comes *before* the `extends` clause, for example `structure S :
Prop extends P`. This is necessary to prevent a parsing ambiguity, but
also this is the natural place for the resultant type. Implements RFC
#7099.

Will need followup PRs for cleanup after a stage0 update.
2025-02-18 07:38:13 +00:00

8 lines
163 B
Text

/-!
# Testing named parent projections for `structure`s
-/
structure S where
structure S' extends toParent : S where
--^ textDocument/hover