feat: dotParam widget to control dot notation
#6267
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This PR introduces the `dotParam` marker to indicate which parameter should be used for generalized field notation ("dot notation"). Example:
```
class A (α : Type _) where
a : α → Nat
def A.get {α : Type _} [A α] (self : dotParam α) : Nat := a self
structure B where
b : Nat
instance : A B := ⟨B.b⟩
namespace B
export A (get)
end B
#check fun (b : B) => b.get
-- b.get : Nat
```
The pretty printing code is modified to support the `export`-resolved dot notation introduced in leanprover#6189.
Closes leanprover#1629, closes leanprover#5482
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This PR introduces the
dotParammarker to indicate which parameter should be used for generalized field notation ("dot notation"). If a function has adotParamparameter, then this will be used instead of any other argument. Example application:The pretty printing code is modified to support the
export-resolved dot notation introduced in #6189.Closes #1629, closes #5482