public static NumberAtom NumberFromComplex(BigInteger val)
{
return(new NumberAtom(Complex.CreateExactReal(val)));
}
public static bool TryNumberFromString(string str, out NumberAtom result)
{
var match = Regex.Match(str, NumberRegex, RegexOptions.Multiline);
if (!match.Success)
{
result = null;
return(false);
}
string[] prefixes = Split(match.Groups[1].Value, 2);
if (prefixes.Any(p => !ValidPrefixes.Contains(p.Substring(1))))
{
result = null;
return(false);
}
if (prefixes.Count(p => ValidExactnessPrefixes.Contains(p.Substring(1))) > 1)
{
result = null;
return(false);
}
if (prefixes.Count(p => ValidRadixPrefixes.Contains(p.Substring(1))) > 1)
{
result = null;
return(false);
}
var realSign = match.Groups[2].Value;
var realTop = match.Groups[3].Value;
var realDiv = match.Groups[4].Value;
var realBot = match.Groups[5].Value;
var imagSign = match.Groups[6].Value;
var imagTop = match.Groups[7].Value;
var imagDiv = match.Groups[8].Value;
var imagBot = match.Groups[9].Value;
if (string.IsNullOrEmpty(realSign))
{
realSign = "+";
}
if (string.IsNullOrEmpty(realDiv))
{
realDiv = "/";
realBot = "1";
}
if (string.IsNullOrEmpty(imagTop))
{
imagTop = "0";
}
if (string.IsNullOrEmpty(imagSign))
{
imagSign = "+";
}
if (string.IsNullOrEmpty(imagDiv))
{
imagDiv = "/";
imagBot = "1";
}
bool?exactness = null;
if (prefixes.Contains("#e"))
{
exactness = true;
}
else if (prefixes.Contains("#i"))
{
exactness = false;
}
else if (realDiv == "." || imagDiv == ".")
{
exactness = false;
}
else
{
exactness = true;
}
int radix = 10;
if (prefixes.Contains("#b"))
{
radix = 2;
}
else if (prefixes.Contains("#o"))
{
radix = 8;
}
else if (prefixes.Contains("#d"))
{
radix = 10;
}
else if (prefixes.Contains("#x"))
{
radix = 16;
}
ComplexPart rr, ri;
var success = ParseComplexPart(realSign, realTop, realDiv, realBot, radix, out rr);
if (!success)
{
result = null; return(false);
}
success = ParseComplexPart(imagSign, imagTop, imagDiv, imagBot, radix, out ri);
if (!success)
{
result = null; return(false);
}
if (exactness.Value)
{
result = NumberFromComplex(Complex.CreateExact(rr, ri));
}
else
{
result = NumberFromComplex(Complex.CreateInExact(rr, ri));
}
return(true);
}
public static NumberAtom NumberFromComplex(Complex val)
{
return(new NumberAtom(val));
}