62f14514da
This PR updates various error messages produced by or associated with built-in tactics and adapts their formatting to current conventions.
109 lines
2.3 KiB
Text
109 lines
2.3 KiB
Text
axiom a : Nat
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axiom b : Nat
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axiom a_eq_b : a = b
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axiom P : Nat → Nat → Prop
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-- Warm-up: rewriting in the forward direction
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/-- error: `simp` made no progress -/
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#guard_msgs in example : P a b := by simp
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attribute [simp] a_eq_b
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/--
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error: unsolved goals
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⊢ P b b
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-/
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#guard_msgs in example : P a b := by simp
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attribute [-simp] a_eq_b
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/-- error: `simp` made no progress -/
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#guard_msgs in example : P a b := by simp
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-- Re-adding an attribute after [-simp] does not work, see
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-- https://github.com/leanprover/lean4/issues/5868
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attribute [simp] a_eq_b
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/-- error: `simp` made no progress -/
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#guard_msgs in example : P a b := by simp
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-- so this test use new copies of `a_eq_b` for now
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axiom a_eq_b_2 : a = b
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attribute [simp ←] a_eq_b_2
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/--
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error: unsolved goals
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⊢ P a a
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-/
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#guard_msgs in example : P a b := by simp
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-- Removing the attribute works, no matter the direction
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attribute [-simp] a_eq_b_2
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/-- error: `simp` made no progress -/
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#guard_msgs in example : P a b := by simp
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-- Setting one should erase the other
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axiom a_eq_b_3 : a = b
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attribute [simp ←] a_eq_b_3
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attribute [simp] a_eq_b_3
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/--
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error: unsolved goals
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⊢ P b b
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-/
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#guard_msgs in example : P a b := by simp
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-- The erasure is sticky:
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attribute [simp ←] a_eq_b_3
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/-- error: `simp` made no progress -/
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#guard_msgs in example : P a b := by simp
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axiom a_eq_b_4 : a = b
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attribute [simp] a_eq_b_4
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attribute [simp ←] a_eq_b_4
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/--
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error: unsolved goals
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⊢ P a a
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-/
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#guard_msgs in example : P a b := by simp
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-- Some more error conditions
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axiom P_a : P a a
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/--
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error: Invalid `←` modifier: Cannot be applied to a rule that rewrites to `True`
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Note: This simp theorem will rewrite `P a a` to `True`, which should not be applied in the reverse direction
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-/
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#guard_msgs in
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attribute [simp ←] P_a
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/--
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error: Cannot add `simp` attribute to `P`: It is not a proposition nor a definition (to unfold)
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Note: The `[simp]` attribute can be added to lemmas that should be automatically used by the simplifier and to definitions that the simplifier should automatically unfold
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-/
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#guard_msgs in
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attribute [simp ←] P
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/--
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error: Invalid `←` modifier: `id` is a declaration name to be unfolded
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Note: The simplifier will automatically unfold definitions marked with the `[simp]` attribute, but it will not "refold" them
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-/
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#guard_msgs in
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attribute [simp ←] id
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