private void CoreFmt <T0, T1, T2>(ref StringMaker sm, IFormatProvider?provider, T0 arg0, T1 arg1, T2 arg2, ReadOnlySpan <object?> args)
{
var literalIndex = 0;
foreach (var segment in _segments)
{
int literalCount = segment.LiteralCount;
if (literalCount > 0)
{
// the segment has some literal text
sm.Append(LiteralString.AsSpan(literalIndex, literalCount));
literalIndex += literalCount;
}
var argIndex = segment.ArgIndex;
if (argIndex >= 0)
{
// the segment has an arg to format
switch (argIndex)
{
case 0:
AppendArg(ref sm, arg0, segment.ArgFormat, provider, segment.ArgWidth);
break;
case 1:
AppendArg(ref sm, arg1, segment.ArgFormat, provider, segment.ArgWidth);
break;
case 2:
AppendArg(ref sm, arg2, segment.ArgFormat, provider, segment.ArgWidth);
break;
default:
AppendArg(ref sm, args[argIndex - 3], segment.ArgFormat, provider, segment.ArgWidth);
break;
}
}
}
}
private static void AppendArg <T>(ref StringMaker sm, T arg, string argFormat, IFormatProvider?provider, int argWidth)
{
switch (arg)
{
case int a:
sm.Append(a, argFormat, provider, argWidth);
break;
case long a:
sm.Append(a, argFormat, provider, argWidth);
break;
case string a:
sm.Append(a, argWidth);
break;
case double a:
sm.Append(a, argFormat, provider, argWidth);
break;
case float a:
sm.Append(a, argFormat, provider, argWidth);
break;
case uint a:
sm.Append(a, argFormat, provider, argWidth);
break;
case ulong a:
sm.Append(a, argFormat, provider, argWidth);
break;
case short a:
sm.Append(a, argFormat, provider, argWidth);
break;
case ushort a:
sm.Append(a, argFormat, provider, argWidth);
break;
case byte a:
sm.Append(a, argFormat, provider, argWidth);
break;
case sbyte a:
sm.Append(a, argFormat, provider, argWidth);
break;
case bool a:
sm.Append(a, argWidth);
break;
case char a:
sm.Append(a, argWidth);
break;
case decimal a:
sm.Append(a, argFormat, provider, argWidth);
break;
case DateTime a:
sm.Append(a, argFormat, provider, argWidth);
break;
case TimeSpan a:
sm.Append(a, argFormat, provider, argWidth);
break;
case ISpanFormattable a:
sm.Append(a, argFormat, provider, argWidth);
break;
case IFormattable a:
sm.Append(a, argFormat, provider, argWidth);
break;
case object a:
sm.Append(a, argWidth);
break;
default:
// when arg == null
sm.Append(string.Empty, argWidth);
break;
}
}