ParserHelpers.cs

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using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.CompilerServices;
using Internal.Runtime.CompilerServices;
 
namespace System.Buffers.Text;
 
internal static class ParserHelpers
{
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool IsDigit(int i)
    {
        return (uint)(i - 48) <= 9u;
    }
 
    public static bool TryParseThrowFormatException(out int bytesConsumed)
    {
        bytesConsumed = 0;
        ThrowHelper.ThrowFormatException_BadFormatSpecifier();
        return false;
    }
 
    public static bool TryParseThrowFormatException<T>(out T value, out int bytesConsumed) where T : struct
    {
        value = default(T);
        return TryParseThrowFormatException(out bytesConsumed);
    }
 
    [DoesNotReturn]
    [StackTraceHidden]
    public static bool TryParseThrowFormatException<T>(ReadOnlySpan<byte> source, out T value, out int bytesConsumed) where T : struct
    {
        Unsafe.SkipInit<T>(out value);
        Unsafe.SkipInit<int>(out bytesConsumed);
        ThrowHelper.ThrowFormatException_BadFormatSpecifier();
        return false;
    }
}