This message is often incorporated into source files via `#guard_msgs`. This change ensures it won't go over the 100 character ruler, and I think is equally grammatical. :-)
20 lines
527 B
Text
20 lines
527 B
Text
example : True := by
|
|
if 1 + 1 = 2 then _ else ?_
|
|
case pos => trivial
|
|
fail_if_success case neg => contradiction
|
|
· contradiction
|
|
|
|
example (p : Prop) : True := by
|
|
if p then ?foo else trivial
|
|
case foo => trivial
|
|
|
|
/-! Should not accidentally leak `open Classical` into branches. -/
|
|
|
|
/--
|
|
error: failed to synthesize
|
|
Decidable p
|
|
Additional diagnostic information may be available using the `set_option diagnostics true` command.
|
|
-/
|
|
#guard_msgs in
|
|
example (p : Prop) : True := by
|
|
if p then exact decide p else trivial
|