Avalonia.fs

namespace Avalonia.Media.TextFormatting.Unicode

open Avalonia.Utility

[<Struct; IsByRefLike>]
type CodepointEnumerator =

    val mutable text : ReadOnlySlice<char>
    val mutable current : Codepoint

    new(text) =
        { text = text; current = Codepoint.ReplacementCodepoint }

    member this.Current = this.current

    member this.MoveNext() =
        if this.text.IsEmpty then
            this.current <- Codepoint.ReplacementCodepoint
            false
        else
            let current, count = Codepoint.ReadAt(this.text, 0)
            this.current <- current
            this.text <- this.text.Skip(count)
            true