lean2/tests/lean/t13.lean

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variable A : Type.{1}
variable f : A → A → A
variable g : A → A → A
precedence `+` : 65
infixl + := f
infixl + := g
variable a : A
variable b : A
print raw a+b -- + is overloaded
check fun (h : A → A → A)
(infixl + := h), -- Like local declarations, local notation "shadows" global one.
a+b