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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.
22 lines
764 B
Plaintext
22 lines
764 B
Plaintext
Parser.pick_while.go
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: ∀(cond: ∀(chr: Char) Bool) (Parser String)
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= λcond λcode
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use P = λx (Parser.Result String)
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use cons = λhead λtail
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use P = λx
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∀(head: Char) ∀(tail: String) (Parser.Result String)
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use true = λhead λtail
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use P = λx (Parser.Result String)
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use done = λcode λvalue
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(Parser.Result.done String code (String.cons head value))
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use fail = λerror (Parser.Result.fail String error)
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(~(Parser.pick_while.go cond tail) P done fail)
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use false = λhead λtail
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(Parser.Result.done
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String
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(String.cons head tail)
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String.nil
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)
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(~(cond head) P true false head tail)
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use nil = (Parser.Result.done String String.nil String.nil)
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(~code P cons nil) |