int IComparer <SymbolAndPower> .Compare(SymbolAndPower x, SymbolAndPower y)
{
if (Math.Sign(x.Power) != Math.Sign(y.Power))
{
return(-1 * x.Power.CompareTo(y.Power));
}
var indexOfX = Array.IndexOf(Order, x.Symbol);
var indexOfY = Array.IndexOf(Order, y.Symbol);
if (indexOfX < 0 && indexOfY < 0)
{
return(string.Compare(x.Symbol, y.Symbol, StringComparison.Ordinal));
}
return(indexOfX.CompareTo(indexOfY));
}
internal static ErrorCase <IReadOnlyList <SymbolAndPower> > CreateForSymbol(string text)
{
IReadOnlyList <SymbolAndPower> expected = new SymbolAndPower[0];
return(new ErrorCase <IReadOnlyList <SymbolAndPower> >(text, 0, expected, 0, null));
}
internal void Append(SymbolAndPower symbolAndPower, SymbolFormat symbolFormat)
{
this.Append(symbolAndPower.Symbol);
if (symbolAndPower.Power == 1)
{
return;
}
switch (symbolFormat)
{
case SymbolFormat.SignedHatPowers:
this.Append('^');
this.Append(symbolAndPower.Power.ToString(CultureInfo.InvariantCulture));
break;
case SymbolFormat.FractionHatPowers:
{
var power = Math.Abs(symbolAndPower.Power);
if (power == 1)
{
return;
}
this.Append('^');
this.Append(power.ToString(CultureInfo.InvariantCulture));
break;
}
case SymbolFormat.SignedSuperScript:
{
if (symbolAndPower.Power == 1)
{
return;
}
if (symbolAndPower.Power < 0)
{
this.Append(SuperScript.Minus);
}
this.Append(SuperScript.GetChar(Math.Abs(symbolAndPower.Power)));
break;
}
case SymbolFormat.Default:
case SymbolFormat.FractionSuperScript:
{
var power = Math.Abs(symbolAndPower.Power);
if (power == 1)
{
return;
}
this.Append(SuperScript.GetChar(Math.Abs(symbolAndPower.Power)));
break;
}
default:
throw new ArgumentOutOfRangeException(nameof(symbolFormat), symbolFormat, null);
}
}
