741347281c
This PR fixes an issue where private definitions recursively invoked using generalized field notation (dot notation) would give an "invalid field" errors. It also fixes an issue where "invalid field notation" errors would pretty print the name of the declaration with a `_private` prefix. Closes #10044
59 lines
1.7 KiB
Text
59 lines
1.7 KiB
Text
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set_option linter.unusedVariables false
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def Nat.bar (x : String) (x : Nat) (y : Nat) := x
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/--
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error: Invalid field notation: `Nat.bar` has a parameter with expected type
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Nat
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but it cannot be used
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Note: The parameter `x` cannot be referred to by name because that function has a preceding parameter of the same name
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Hint: Consider rewriting this application without field notation (e.g., `C.f x` instead of `x.f`) or changing the parameter names of the function to avoid this conflict
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-/
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#guard_msgs in
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#check Nat.zero.bar
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structure F where
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f : Bool → Nat → Nat
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def Nat.foo : F := { f := fun _ _ => 0 }
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section
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local instance : CoeFun F (fun _ => Bool → Nat → Nat) where
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coe x := fun (a : Bool) (b : Nat) => x.f a b
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/--
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error: Invalid field notation: `Nat.foo.f` (coerced from `Nat.foo`) has a parameter with expected type
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Nat
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but it cannot be used
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Note: Field notation cannot refer to parameter `b` by name because that constant was coerced to a function
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Hint: Consider rewriting this application without field notation (e.g., `C.f x` instead of `x.f`)
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-/
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#guard_msgs in #check Nat.zero.foo
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/-- info: (fun a b => Nat.foo.f a b) true Nat.zero : Nat -/
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#guard_msgs in #check Nat.zero.foo true
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end
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section
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local instance : CoeFun F (fun _ => Bool → Nat → Nat) where
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coe x := fun _ _ => 0
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/--
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error: Invalid field notation: `fun x x => 0` (coerced from `Nat.foo`) has a parameter with expected type
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Nat
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but it cannot be used
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Hint: Consider rewriting this application without field notation (e.g., `C.f x` instead of `x.f`)
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-/
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#guard_msgs in #check Nat.zero.foo
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/-- info: (fun x x => 0) true Nat.zero : Nat -/
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#guard_msgs in #check Nat.zero.foo true
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end
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