Files
lean4/tests/elab/PArray_forM.lean
Garmelon 08eb78a5b2 chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

30 lines
838 B
Lean4

import Lean.Data.PersistentArray
/-!
Test `PersistentArray.forM` with nonzero start position.
-/
def mk (n : Nat) : Lean.PersistentArray Nat :=
List.range n |>.toPArray'
def sum1 (start : Nat) (s : List Nat) : Nat :=
let (_, s) := StateT.run (m := Id) (s.drop start |>.forM fun val => modify (· + val)) 0
s
def sum2 (start : Nat) (s : Lean.PArray Nat) : Nat :=
let (_, s) := StateT.run (m := Id) (s.forM (start := start) (fun val => modify (· + val))) 0
s
def check (s₁ : List Nat) : IO Unit := do
let s₂ := s₁.toPArray'
let n := s₂.size
for i in *...n do
unless sum1 i s₁ == sum2 i s₂ do
throw <| .userError "failed"
IO.println "ok"
#eval check (List.range 10)
#eval check (List.range 0)
#eval check (List.range 2000)
#eval check (List.replicate 1000 1)
#eval check (List.replicate 10 2)