272dd5533f
We are considering removing `.` as an alternative for `·` in the lambda dot notation (e.g., `(·+·)`). Reasons: - `.` is not a perfect replacement for `·` (e.g., `(·.insert ·)`) - `.` is too overloaded: `(f.x)` and `(f .x)` and `(f . x)`. We want to keep the first two.
27 lines
637 B
Text
27 lines
637 B
Text
structure Bar (α : Type) where
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a : α
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b : Nat → α
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structure Baz (α : Type) where
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a : α → α
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c : Bool → α
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d : Nat
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set_option structureDiamondWarning false in
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structure Foo (α : Type) extends Bar α, Baz α -- Error: parent field type mismatch
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set_option structureDiamondWarning false in
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structure Foo (α : Type) extends Bar (α → α), Baz α
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#print Foo
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def f (x : Nat) : Foo Nat :=
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{ a := fun y => x + y
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b := (· + ·)
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c := fun _ => x
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d := x }
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#print f
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set_option structureDiamondWarning true in
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structure Foo' (α : Type) extends Bar (α → α), Baz α -- Warning: parent field duplication
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