8424ddbb3e
This PR improves the “expected type mismatch” error message by omitting the type's types when they are defeq, and putting them into separate lines when not. I found it rather tediuos to parse the error message when the expected type is long, because I had to find the `:` in the middle of a large expression somewhere. Also, when both are of sort `Prop` or `Type` it doesn't add much value to print the sort (and it’s only one hover away anyways).
77 lines
1.8 KiB
Text
77 lines
1.8 KiB
Text
/-!
|
|
Tests for `partial_fixpoint` with explicit proofs
|
|
-/
|
|
|
|
/-- warning: declaration uses 'sorry' -/
|
|
#guard_msgs in
|
|
def nullary (x : Nat) : Option Unit := nullary (x + 1)
|
|
partial_fixpoint monotonicity sorry
|
|
|
|
-- Check for metavariables
|
|
|
|
set_option pp.mvars.anonymous false in
|
|
/--
|
|
error: don't know how to synthesize placeholder for argument 'a'
|
|
context:
|
|
⊢ Lean.Order.monotone fun f x => f (x + 1)
|
|
-/
|
|
#guard_msgs in
|
|
def nullarya (x : Nat) : Option Unit := nullarya (x + 1)
|
|
partial_fixpoint monotonicity id _
|
|
|
|
def nullaryb (x : Nat) : Option Unit := nullaryb (x + 1)
|
|
partial_fixpoint monotonicity fun _ _ a _ => a _
|
|
|
|
/-- info: nullaryb.eq_1 (x : Nat) : nullaryb x = nullaryb (x + 1) -/
|
|
#guard_msgs in #check nullaryb.eq_1
|
|
|
|
-- Type error
|
|
|
|
/--
|
|
error: type mismatch
|
|
()
|
|
has type
|
|
Unit
|
|
of sort `Type` but is expected to have type
|
|
Lean.Order.monotone fun f x => f (x + 1)
|
|
of sort `Prop`
|
|
-/
|
|
#guard_msgs in
|
|
def nullary2 (x : Nat) : Option Unit := nullary2 (x + 1)
|
|
partial_fixpoint monotonicity ()
|
|
|
|
|
|
-- Good indent (bad indents are tested in partial_fixpoint_parseerrors
|
|
|
|
def nullary4 (x : Nat) : Option Unit := nullary4 (x + 1)
|
|
partial_fixpoint monotonicity
|
|
fun _ _ a x => a (x + 1)
|
|
|
|
|
|
-- Tactics
|
|
|
|
/-- info: Try this: exact fun x y a x => a (x + 1) -/
|
|
#guard_msgs in
|
|
def nullary6 (x : Nat) : Option Unit := nullary6 (x + 1)
|
|
partial_fixpoint monotonicity by
|
|
exact?
|
|
|
|
#guard_msgs in
|
|
def nullary7 (x : Nat) : Option Unit := nullary7 (x + 1)
|
|
partial_fixpoint monotonicity by
|
|
apply Lean.Order.monotone_of_monotone_apply
|
|
intro y
|
|
apply Lean.Order.monotone_apply
|
|
apply Lean.Order.monotone_id
|
|
|
|
-- Mutual
|
|
|
|
mutual
|
|
|
|
def mutual1 (x : Nat) : Option Unit := mutual2 (x + 1)
|
|
partial_fixpoint monotonicity fun _ _ a x => a.2 (x + 1)
|
|
|
|
def mutual2 (x : Nat) : Option Unit := mutual1 (x + 1)
|
|
partial_fixpoint monotonicity fun _ _ a x => a.1 (x + 1)
|
|
|
|
end
|