99031695bd
This PR adds a new delab option `pp.coercions.types` which, when enabled, will display all coercions with an explicit type ascription. [Link to Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/239415-metaprogramming-.2F-tactics/topic/Roundtripping.20delaboration.20involving.20coercions) Towards #4315
26 lines
428 B
Text
26 lines
428 B
Text
/-!
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# Tests for `pp.coercions.types` option
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-/
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-- With the option off (default)
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/--
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info: n : Nat
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h : n = 0
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⊢ ↑n = 0
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-/
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#guard_msgs in
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example (n : Nat) (h : n = 0) : (↑n : Int) = 0 := by
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trace_state
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simp [h]
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-- With the option on
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/--
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info: n : Nat
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h : n = 0
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⊢ (↑n : Int) = 0
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-/
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#guard_msgs in
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set_option pp.coercions.types true in
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example (n : Nat) (h : n = 0) : (↑n : Int) = 0 := by
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trace_state
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simp [h]
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