private (String Raw, Double Value) ReadLuaHex( )
{
var rawNumber = new StringBuilder( );
this.reader.Advance(2);
rawNumber.Append("0x");
String integer = this.reader.ReadStringWhile(LJUtils.IsXDigit), fractional = null, shift = null;
rawNumber.Append(integer);
if (this.reader.IsNext("."))
{
this.reader.Advance(1);
rawNumber.Append('.');
fractional = this.reader.ReadStringWhile(LJUtils.IsXDigit);
rawNumber.Append(fractional);
}
if (this.reader.IsNext("p") || this.reader.IsNext("P"))
{
rawNumber.Append(this.reader.ReadString(1));
if (this.reader.IsNext("+") || this.reader.IsNext("-"))
{
rawNumber.Append(this.reader.ReadString(1));
}
shift = this.reader.ReadStringWhile(LJUtils.IsDigit);
rawNumber.Append(shift);
if (String.IsNullOrEmpty(shift))
{
throw new LexException("Malformed number literal (missing exponent).", this.Location);
}
}
if (String.IsNullOrEmpty(integer) && String.IsNullOrEmpty(fractional))
{
throw new LexException("Malformed number literal (missing both integral part and fractional part).", this.Location);
}
return(
Raw : rawNumber.ToString( ),
Value : CInterop.atof(rawNumber.ToString( ))
);
}
private (String Raw, Double Value) ReadLuaDec( )
{
var rawNumber = new StringBuilder( );
String integer = this.reader.ReadStringWhile(LJUtils.IsDigit), fractional = null, exp = null;
rawNumber.Append(integer);
if (this.Consume('.'))
{
rawNumber.Append('.');
fractional = this.reader.ReadStringWhile(LJUtils.IsDigit);
rawNumber.Append(fractional);
}
if (this.reader.IsNext("e") || this.reader.IsNext("E"))
{
rawNumber.Append(this.reader.ReadString(1));
if (this.reader.IsNext("+") || this.reader.IsNext("-"))
{
rawNumber.Append(this.reader.ReadString(1));
}
exp = this.reader.ReadStringWhile(LJUtils.IsDigit);
rawNumber.Append(exp);
if (String.IsNullOrEmpty(exp))
{
throw new LexException("Malformed number literal.", this.Location);
}
}
if (String.IsNullOrEmpty(integer) && String.IsNullOrEmpty(fractional))
{
throw new LexException("Malformed number literal.", this.Location);
}
return(
Raw : rawNumber.ToString( ),
Value : CInterop.atof(rawNumber.ToString( ))
);
}