4f2e0c6d7f
The new command provides a uniform way to set declaration attributes. It replaces the commands: class, instance, coercion, multiple_instances, reducible, irreducible
48 lines
795 B
Text
48 lines
795 B
Text
import logic
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namespace N1
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constant num : Type.{1}
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constant foo : num → num → num
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end N1
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namespace N2
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constant val : Type.{1}
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constant foo : val → val → val
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end N2
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open N1
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open N2
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constants a b : num
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constants x y : val
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check foo a b
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check foo x y
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constant f : num → val
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attribute f [coercion]
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check foo a x
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check foo x y
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check foo x a
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check foo a b
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theorem T1 : foo a b = N1.foo a b
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:= eq.refl _
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definition aux1 := foo a b -- System elaborated it to N1.foo a b
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#erase_cache T2
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theorem T2 : aux1 = N1.foo a b
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:= eq.refl _
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open N1
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definition aux2 := foo a b -- Now N1 is in the end of the queue, this is elaborated to N2.foo (f a) (f b)
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check aux2
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theorem T3 : aux2 = N2.foo (f a) (f b)
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:= eq.refl aux2
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check foo a b
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theorem T4 : foo a b = N2.foo a b
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:= eq.refl _
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