c22100036c
This PR changes match compilation to reject some pattern matches that were previously accepted due to inaccessible patterns sometimes treated like accessible ones. Fixes #10794.
32 lines
731 B
Text
32 lines
731 B
Text
/--
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error: Dependent match elimination failed: Could not solve constraints
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true ≋ false
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-/
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#guard_msgs in
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def test1 b := match b with
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| .(false) => 1
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| true => 2
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/--
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error: Dependent match elimination failed: Could not solve constraints
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true ≋ false
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-/
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#guard_msgs in
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def test2 : (b : Bool) → (h : b = false) → Nat
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| .(false), .(rfl) => 1
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| true, _ => 2
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-- works
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def test3 : (b : Bool) → (h : b = false) → Nat
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| .(false), rfl => 1
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/--
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@ +3:4...11
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error: Redundant alternative: Any expression matching
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true, x✝
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will match one of the preceding alternatives
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-/
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#guard_msgs (positions := true) in
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def test4 : (b : Bool) → (h : b = false) → Nat
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| .(false), rfl => 1
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| true, _ => 2 -- error here
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