ed705306ae
This PR clarifies the invalid field notation error when projected value type is a metavariable. Co-authored-by @sgraf812. --------- Co-authored-by: Sebastian Graf <sg@lean-fro.org>
53 lines
1.2 KiB
Text
53 lines
1.2 KiB
Text
structure Foo where (n : Nat)
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def Foo.f1 (f : Foo) : Nat := f.n
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def Foo.f2 (f : Foo) : Nat := f.n
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def Foo.f3 (f : Foo) : Nat := f.n
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def Foo.f4 (f : Foo) : Nat := f.n
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def Foo.f5 (f : Foo) : Nat := f.n
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/--
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error: Invalid field notation: type of
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f
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is not known; cannot resolve field 'n'
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---
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error: Invalid field notation: type of
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g
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is not known; cannot resolve field 'n'
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---
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error: Invalid field notation: type of
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f
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is not known; cannot resolve field 'f1'
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---
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error: Invalid field notation: type of
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g
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is not known; cannot resolve field 'f2'
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---
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error: Invalid field notation: type of
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h
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is not known; cannot resolve field 'f3'
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---
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error: Invalid field notation: type of
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f
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is not known; cannot resolve field 'f4'
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---
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error: Invalid field notation: type of
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g
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is not known; cannot resolve field 'f5'
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---
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error: Invalid field notation: type of
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h
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is not known; cannot resolve field 'f6'
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-/
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#guard_msgs in
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example := (λ f g h =>
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let x : Foo := ⟨f.n + 1⟩;
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let y : Foo := ⟨g.n + 1⟩;
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(λ f g h => f.f1 + g.f2 + h.f3 + f.f4 + g.f5 + h.f6) f g h)
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/--
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error: Invalid field notation: type of
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id x
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is not known; cannot resolve field 'foo'
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-/
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#guard_msgs in
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example := fun x => (id x).foo
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