lean4-htt/tests/lean/1363.lean
Markus Himmel 2c2fcff4f8
refactor: do not use String.Iterator (#11127)
This PR removes all uses of `String.Iterator` from core, preferring
`String.ValidPos` instead.

In an upcoming PR, `String.Iterator` will be renamed to
`String.Legacy.Iterator`.
2025-11-11 11:46:58 +00:00

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import Std.Internal.Parsec
open Std Internal Parsec String
@[macro_inline] -- Error
def f : Nat → Nat
| 0 => 0
| n + 1 => f n
@[macro_inline] -- Error
def g : Nat → Nat
| 0 => 0
| n + 1 => g n
termination_by x => x
@[macro_inline] -- Error
def h : Nat → Nat → Nat
| 0, _ => 0
| n + 1, m => h n m
termination_by x y => x
@[macro_inline] -- Error
partial def skipMany (p : Parser α) (it : Sigma String.ValidPos) : Parser PUnit := do
match p it with
| .success it _ => skipMany p it
| .error _ _ => pure ()