max/lean4-htt
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 2

doc: update RELEASES.md

Browse source
This commit is contained in:
Leonardo de Moura 2022-02-14 15:58:58 -08:00
parent 66e0b72c6f
commit f33cb27d1c
1 changed files with 20 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
RELEASES.md
View file

@ -36,3 +36,23 @@ def concat : List ((α : Type) × ToString α × α) → String
| [] => ""
| ⟨_, _, a⟩ :: as => toString a ++ concat as
```
* Notation for providing the motive for `match` expressions has changed.
Before:
```lean
match x, rfl : (y : Nat) → x = y → Nat with
| 0, h => ...
| x+1, h => ...
```
Now:
```lean
match (motive := (y : Nat) → x = y → Nat) x, rfl with
| 0, h => ...
| x+1, h => ...
```
With this change, the notation for giving names to equality proofs in `match`-expressions is not whitespace sensitive anymore. That is,
we can now write
```lean
match h : sort.swap a b with
| (r₁, r₂) => ... -- `h : sort.swap a b = (r₁, r₂)`
```