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Now, there are two local binders: let x = ... use x = ... The 'let' binder will create a local definition, type-check it, and assign a name to it. When compiled, it will create 'dup' nodes. The 'use' binder is just an alias. It will not bind a new variable, and, when compiled, will create inline copies. Also, for type-checking, it allows creating aliases that are definitionaly equal for the checker.
11 lines
258 B
Plaintext
11 lines
258 B
Plaintext
Maybe.bind
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: ∀(A: *)
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∀(B: *)
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∀(a: (Maybe A))
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∀(b: ∀(x: A) (Maybe B))
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(Maybe B)
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= λA λB λa λb
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use P = λx ∀(b: ∀(x: A) (Maybe B)) (Maybe B)
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use some = λa.value λb (b a.value)
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use none = λb (Maybe.none B)
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(~a P some none b) |