From 18484e28ef7b13b95dc3af0b1e34c2181e1778e5 Mon Sep 17 00:00:00 2001
From: Ryan Lahfa
Date: Wed, 17 Apr 2024 00:01:34 +0200
Subject: compiler: map `core::mem::swap` to the pure swap
In the pure functional model, `swap` is mostly about borrow checking and
should simplify to the pure swap in our backends.
Other backends than Lean are not done in this commit.
Signed-off-by: Ryan Lahfa <ryan.lahfa@inria.fr>
---
backends/lean/Base/Primitives/Base.lean | 2 ++
1 file changed, 2 insertions(+)
(limited to 'backends/lean')
diff --git a/backends/lean/Base/Primitives/Base.lean b/backends/lean/Base/Primitives/Base.lean
index 62546ac3..94134d86 100644
--- a/backends/lean/Base/Primitives/Base.lean
+++ b/backends/lean/Base/Primitives/Base.lean
@@ -132,6 +132,8 @@ def Result.attach {α: Type} (o : Result α): Result { x : α // o = ok x } :=
@[simp] def core.mem.replace (a : Type) (x : a) (_ : a) : a × a := (x, x)
/- [core::option::Option::take] -/
@[simp] def Option.take (T: Type) (self: Option T): Option T × Option T := (self, .none)
+/- [core::mem::swap] -/
+@[simp] def core.mem.swap (T: Type) (a b: T): T × T := (b, a)
/-- Aeneas-translated function -- useful to reduce non-recursive definitions.
Use with `simp [ aeneas ]` -/
--
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