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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.
13 lines
321 B
Plaintext
13 lines
321 B
Plaintext
List.Concatenator.join
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: ∀(T: *) ∀(xs: (List (List.Concatenator T)))
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(List.Concatenator T)
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= λT λxs
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use P = λxs (List.Concatenator T)
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use cons = λhead λtail
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(List.Concatenator.concat
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T
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head
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(List.Concatenator.join T tail)
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)
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use nil = (List.Concatenator.nil T)
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(~xs P cons nil) |