/// <summary>
/// Try parsing a correctly-formatted float floating-point literal into the nearest representable float
/// using IEEE round-to-nearest-ties-to-even rounding mode. Behavior is not defined for inputs that are
/// not valid C# floating-point literals.
/// </summary>
/// <param name="s">The float floating-point constant's string</param>
/// <param name="f">The nearest float value, if conversion succeeds</param>
/// <returns>True if the input was converted; false if there was an overflow</returns>
public static bool TryParseFloat(string s, out float f)
{
DecimalFloatingPointString str = DecimalFloatingPointString.FromSource(s);
FloatFloatingPointType dbl = FloatFloatingPointType.Instance;
Status status = RealParser.ConvertDecimalToFloatingPointBits(str, dbl, out ulong result);
f = Int32BitsToFloat((uint)result);
return(status != Status.Overflow);
}
/// <summary>
/// Try parsing a correctly-formatted double floating-point literal into the nearest representable double
/// using IEEE round-to-nearest-ties-to-even rounding mode. Behavior is not defined for inputs that are
/// not valid C# floating-point literals.
/// </summary>
/// <param name="s">The decimal floating-point constant's string</param>
/// <param name="d">The nearest double value, if conversion succeeds</param>
/// <returns>True if the input was converted; false if there was an overflow</returns>
public static bool TryParseDouble(string s, out double d)
{
DecimalFloatingPointString str = DecimalFloatingPointString.FromSource(s);
DoubleFloatingPointType dbl = DoubleFloatingPointType.Instance;
Status status = RealParser.ConvertDecimalToFloatingPointBits(str, dbl, out ulong result);
d = BitConverter.Int64BitsToDouble((long)result);
return(status != Status.Overflow);
}
/// <summary>
/// Try parsing a correctly-formatted float floating-point literal into the nearest representable float
/// using IEEE round-to-nearest-ties-to-even rounding mode. Behavior is not defined for inputs that are
/// not valid C# floating-point literals.
/// </summary>
/// <param name="s">The float floating-point constant's string</param>
/// <param name="f">The nearest float value, if conversion succeeds</param>
/// <returns>True of the input was converted; false if there was an overflow</returns>
public static bool TryParseFloat(string s, out float f)
{
try
{
var str = DecimalFloatingPointString.FromSource(s);
var dbl = FloatFloatingPointType.Instance;
ulong result;
var status = RealParser.ConvertDecimalToFloatingPointBits(str, dbl, out result);
f = Int32BitsToFloat((uint)result);
return(status != Status.Overflow);
}
catch (System.FormatException)
{
f = 0.0f;
return(false);
}
}
/// <summary>
/// Try parsing a correctly-formatted double floating-point literal into the nearest representable double
/// using IEEE round-to-nearest-ties-to-even rounding mode. Behavior is not defined for inputs that are
/// not valid C# floating-point literals.
/// </summary>
/// <param name="s">The decimal floating-point constant's string</param>
/// <param name="d">The nearest double value, if conversion succeeds</param>
/// <returns>True of the input was converted; false if there was an overflow</returns>
public static bool TryParseDouble(string s, out double d)
{
try
{
var str = DecimalFloatingPointString.FromSource(s);
var dbl = DoubleFloatingPointType.Instance;
ulong result;
var status = RealParser.ConvertDecimalToFloatingPointBits(str, dbl, out result);
d = BitConverter.Int64BitsToDouble((long)result);
return(status != Status.Overflow);
}
catch (System.FormatException)
{
// this can occur when the exponent is empty (e.g. "0.0e") or too large to fit in an integer
d = 0.0;
return(false);
}
}