Skip to content

feat: TimeM is a LawfulMonad #316

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
chenson2018 merged 1 commit into from
Feb 4, 2026
+14 −0
Merged

feat: TimeM is a LawfulMonad #316

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 14 additions & 0 deletions Cslib/Algorithms/Lean/TimeM.lean
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,20 @@ instance : Monad TimeM where
pure := pure
bind := bind

instance : LawfulMonad TimeM := .mk'
(id_map := fun x => by rfl)
(pure_bind := by
intros
simp only [Bind.bind, Pure.pure]
rw [bind, pure]
simp)
(bind_assoc := by
intros
simp only [Bind.bind]
unfold bind
simp only [mk.injEq, true_and]
ac_rfl)

/-- Creates a `TimeM` computation with a specified value and time cost.
The time cost defaults to 1 if not provided. -/
@[simp, grind =] def tick {α : Type*} (a : α) (c : ℕ := 1) : TimeM α := ⟨a, c⟩
Expand Down
Loading