/// <summary>
/// Determines whether the float literal node is a literal value that overflows/underflows a 32 bit float.
/// </summary>
/// <param name="node">The float literal node to test.</param>
/// <returns><see cref="LSLLiteralOverflowType"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="node"/> is <c>null</c>.</exception>
public static LSLLiteralOverflowType CheckForOverflow(this ILSLFloatLiteralNode node)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
var formatedFloatString = LSLFormatTools.FormatFloatString(node.RawText.TrimEnd('f', 'F'));
bool nonZero = formatedFloatString.TakeWhile(c => c != 'e').Any(c => c != '0' && c != '.' && c != 'f');
if (!nonZero)
{
return(LSLLiteralOverflowType.None);
}
double val;
try
{
val = double.Parse(formatedFloatString);
}
catch (OverflowException)
{
return(LSLLiteralOverflowType.Overflow);
}
if (val > 3.402823466E+38)
{
return(LSLLiteralOverflowType.Overflow);
}
if (val < 1.401298464E-45)
{
return(LSLLiteralOverflowType.Underflow);
}
return(LSLLiteralOverflowType.None);
}
/// <summary>
/// Visits a float literal token node during a syntax tree traversal.
/// </summary>
/// <param name="node">The Syntax Tree Node.</param>
/// <returns>An object of type (T) from the visitor implementation of this function.</returns>
public virtual T VisitFloatLiteral(ILSLFloatLiteralNode node)
{
return(default(T));
}
