62f14514da
This PR updates various error messages produced by or associated with built-in tactics and adapts their formatting to current conventions.
28 lines
653 B
Text
28 lines
653 B
Text
/-!
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The (attribute-extensible) `rfl` tactic only unfolds the goal with reducible transparency to look
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for a relation which may have a `refl` lemma associated with it. But historically, `rfl` also
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invoked `eq_refl`, which more aggressively unfolds. This checks that this still works.
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-/
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def Foo (a b : Nat) : Prop := a = b
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/--
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error: Tactic `rfl` failed: No `[refl]` lemma registered for relation
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Foo
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Hint: Add the `[refl]` attribute to reflexivity lemmas for `Foo` to use this tactic
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⊢ Foo 1 1
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-/
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#guard_msgs in
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example : Foo 1 1 := by
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apply_rfl
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#guard_msgs in
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example : Foo 1 1 := by
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eq_refl
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#guard_msgs in
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example : Foo 1 1 := by
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rfl
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