b7db82894b
For experimentation by @the-sofi-uwu. I also have an efficient number parser in LeanSAT that I am planning to upstream after we have sufficiently bikeshed this change.
25 lines
519 B
Text
25 lines
519 B
Text
import Lean.Data.Parsec
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open Lean Parsec String
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@[macro_inline] -- Error
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def f : Nat → Nat
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| 0 => 0
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| n + 1 => f n
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@[macro_inline] -- Error
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def g : Nat → Nat
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| 0 => 0
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| n + 1 => g n
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termination_by x => x
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@[macro_inline] -- Error
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def h : Nat → Nat → Nat
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| 0, _ => 0
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| n + 1, m => h n m
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termination_by x y => x
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@[macro_inline] -- Error
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partial def skipMany (p : Parser α) (it : String.Iterator) : Parser PUnit := do
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match p it with
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| .success it _ => skipMany p it
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| .error _ _ => pure ()
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