dcea47db02
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. :-)
37 lines
1.1 KiB
Text
37 lines
1.1 KiB
Text
import Lean
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open Lean Elab Tactic
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macro "obviously1" : tactic => `(tactic| exact sorryAx _)
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theorem result1 : False := by obviously1
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elab "obviously2" : tactic =>
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liftMetaTactic1 fun mvarId => mvarId.admit *> pure none
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theorem result2 : False := by obviously2
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/--
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error: failed to synthesize
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OfNat Bool 0
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numerals are polymorphic in Lean, but the numeral `0` cannot be used in a context where the expected type is
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Bool
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due to the absence of the instance above
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Additional diagnostic information may be available using the `set_option diagnostics true` command.
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-/
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#guard_msgs in
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def x : Bool := 0
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theorem result3 : False := by obviously2
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/--
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error: failed to synthesize
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OfNat Bool 0
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numerals are polymorphic in Lean, but the numeral `0` cannot be used in a context where the expected type is
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Bool
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due to the absence of the instance above
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Additional diagnostic information may be available using the `set_option diagnostics true` command.
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-/
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#guard_msgs in
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theorem result4 : False := by -- Does not generate a `sorry` warning because there is an error
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let x : Bool := 0
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obviously2
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