4759506bcf
This PR improves the consistency of error message formatting by rendering addenda of several existing error messages as labeled notes and hints.
39 lines
1.1 KiB
Text
39 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 _ false)
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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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Hint: 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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Hint: 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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