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authorRyan Lahfa2024-04-17 00:01:34 +0200
committerRyan Lahfa2024-04-24 11:04:11 +0200
commit18484e28ef7b13b95dc3af0b1e34c2181e1778e5 (patch)
treef9480db9b7b00df8a2c4eae43c9705be5b8e2928 /backends/lean/Base/Primitives
parentc264b08cfb9beb5fe34d872b02a8f4cd1e12d45e (diff)
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>
Diffstat (limited to 'backends/lean/Base/Primitives')
-rw-r--r--backends/lean/Base/Primitives/Base.lean2
1 files changed, 2 insertions, 0 deletions
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 ]` -/