INNER CODE UNIT · Python

decimalFlag

lean-dojo/TorchLean · scripts/generate_unicode_table.py:198

def decimalFlag : UInt8 := {DECIMAL}

{table}
/--
The property run containing a character, if it has any recorded property.

The structural fuel keeps lookup reducible in kernel proofs of the lexer. The pinned
`Array.binSearch` implementation does not reduce through the imported module boundary.
-/
def lookup? (char : Char) : Option Interval :=
  search char.val intervals.size 0 intervals.size
where
  search (codepoint : UInt32) : (fuel lo hi : Nat) → Option Interval
    | 0, _, _ => none
    | fuel + 1, lo, hi =>
        if lo < hi then
          let mid := (lo + hi) / 2
          match intervals[mid]? with

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