lean4-htt/tests/lean/run/grind_attrs.lean
Sebastian Ullrich e1d15946f7
feat: elaborate theorem bodies in parallel (#7084)
This PR enables the elaboration of theorem bodies, i.e. proofs, to
happen in parallel to each other as well as to other elaboration tasks.

Specifically, to be eligible for parallel proof elaboration,
* the theorem must not be in a `mutual` block
* `deprecated.oldSectionVars` must not be set
* `Elab.async` must be set (currently defaults to `true` in the language
server, `false` on the cmdline)

To be activated for downstream projects (i.e. in stage 1) pending
further Mathlib validation.
2025-03-14 07:50:42 +00:00

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opaque R : Nat → Nat → Prop
@[grind ->]
axiom Rtrans {x y z : Nat} : R x y → R y z → R x z
@[grind →]
axiom Rtrans' {x y z : Nat} : R x y → R y z → R x z
@[grind <-]
axiom Rsymm {x y : Nat} : R x y → R y x
@[grind ←]
axiom Rsymm' {x y : Nat} : R x y → R y x
example : R a b → R b c → R d c → R a d := by
grind only [-> Rtrans, <- Rsymm]
example : R a b → R b c → R d c → R a d := by
grind only [→ Rtrans, ← Rsymm]
opaque State : Type
opaque State.le (σ₁ σ₂ : State) : Prop
axiom State.update : State → Nat → Nat → State
opaque Expr : Type
opaque Expr.eval : Expr → State → Nat
axiom Expr.constProp : Expr → State → Expr
/-- info: [grind.ematch.pattern] eval_constProp_of_sub: [State.le #3 #2, constProp #1 #3] -/
#guard_msgs (info) in
set_option trace.grind.ematch.pattern true in
@[grind =>] theorem Expr.eval_constProp_of_sub (e : Expr) (h : State.le σ' σ) : (e.constProp σ').eval σ = e.eval σ :=
sorry
/-- info: [grind.ematch.pattern] eval_constProp_of_eq_of_sub: [State.le #3 #2, constProp #1 #3] -/
#guard_msgs (info) in
set_option trace.grind.ematch.pattern true in
@[grind =>] theorem Expr.eval_constProp_of_eq_of_sub {e : Expr} (h₂ : State.le σ' σ) : (e.constProp σ').eval σ = e.eval σ :=
sorry
/-- info: [grind.ematch.pattern] update_le_update: [le #4 #3, update #4 #2 #1] -/
#guard_msgs (info) in
set_option trace.grind.ematch.pattern true in
@[grind =>] theorem State.update_le_update (h : State.le σ' σ) : State.le (σ'.update x v) (σ.update x v) :=
sorry