lean4-htt/tests/lean/user_attribute.lean

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attribute [user_attribute]
definition foo := ⦃user_attribute, descr := "bar"⦄
print attributes
attribute [foo] eq.refl
print [foo]
print eq.refl
-- compound names
attribute [user_attribute]
definition foo.baz := ⦃user_attribute, descr := "bar"⦄
print attributes
attribute [foo.baz] eq.refl
print [foo.baz]
print eq.refl
-- can't redeclare attributes
attribute [user_attribute]
definition reducible := ⦃user_attribute, descr := "bar"⦄
-- wrong type
attribute [user_attribute]
definition bar := "bar"
section
variable x : string
attribute [user_attribute]
definition bar := ⦃user_attribute, descr := x⦄
end