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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.
21 lines
506 B
Plaintext
21 lines
506 B
Plaintext
IO.bind
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: ∀(A: *)
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∀(B: *)
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∀(a: (IO A))
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∀(b: ∀(x: A) (IO B))
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(IO B)
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= λA λB λa λb
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use P = λx ∀(b: ∀(x: A) (IO B)) (IO B)
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use print = λtext λthen λb
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(IO.print B text λx (IO.bind A B (then x) b))
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use load = λfile λthen λb
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(IO.load B file λs (IO.bind A B (then s) b))
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use save = λfile λdata λthen λb
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(IO.save
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B
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file
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data
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λx (IO.bind A B (then Unit.one) b)
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)
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use done = λterm λb (b term)
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(~a P print load save done b) |