0e49576fe4
This PR makes `#guard_msgs` to treat `trace` messages separate from `info`, `warning` and `error`. It also introduce the ability to say `#guard_msgs (pass info`, like `(drop info)` so far, and also adds `(check info)` as the explicit form of `(info)`, for completeness. Fixes #8266
67 lines
1,003 B
Text
67 lines
1,003 B
Text
import Lean
|
|
|
|
|
|
|
|
open Lean.Elab.Term
|
|
open Lean.Elab.Command
|
|
|
|
elab "∃'" b:term "," P:term : term => do
|
|
let ex ← `(Exists (fun $b => $P));
|
|
elabTerm ex none
|
|
|
|
elab "#check2" b:term : command => do
|
|
let cmd ← `(#check $b #check $b);
|
|
elabCommand cmd
|
|
|
|
#check ∃' x, x > 0
|
|
|
|
#check ∃' (x : UInt32), x > 0
|
|
|
|
#check2 10
|
|
|
|
elab "try" t:tactic : tactic => do
|
|
let t' ← `(tactic| first | $t:tactic | skip);
|
|
Lean.Elab.Tactic.evalTactic t'
|
|
|
|
set_option linter.unusedVariables false
|
|
|
|
/--
|
|
trace: case h₁
|
|
x y z : Nat
|
|
h1 : y = z
|
|
h2 : x = x
|
|
h3 : x = y
|
|
⊢ x = ?b
|
|
|
|
case h₂
|
|
x y z : Nat
|
|
h1 : y = z
|
|
h2 : x = x
|
|
h3 : x = y
|
|
⊢ ?b = z
|
|
|
|
case b
|
|
x y z : Nat
|
|
h1 : y = z
|
|
h2 : x = x
|
|
h3 : x = y
|
|
⊢ Nat
|
|
---
|
|
trace: case h₂
|
|
x y z : Nat
|
|
h1 : y = z
|
|
h2 : x = x
|
|
h3 : x = y
|
|
⊢ y = z
|
|
-/
|
|
#guard_msgs in
|
|
theorem tst (x y z : Nat) : y = z → x = x → x = y → x = z :=
|
|
by {
|
|
intro h1; intro h2; intro h3;
|
|
apply @Eq.trans;
|
|
try exact h1; -- `exact h1` fails
|
|
trace_state;
|
|
try exact h3;
|
|
trace_state;
|
|
try exact h1;
|
|
}
|