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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.
7 lines
143 B
Plaintext
7 lines
143 B
Plaintext
U60.from_nat
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: ∀(n: Nat) #U60
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= λn
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use P = λx #U60
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use succ = λn.pred #(+ #1 (U60.from_nat n.pred))
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use zero = #0
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(~n P succ zero) |