/// <summary>
/// numeric :
/// PLUS_SIGN? UNSIGNED_INTEGER
/// | APPROXIMATE_NUM_LIT
/// ;
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public static int ToInteger(this PlSqlParser.NumericContext context)
{
string value = null;
var unsigned_integer = context.UNSIGNED_INTEGER();
if (unsigned_integer != null)
{
value = unsigned_integer.GetText();
}
else
{
var approximate_num_lit = context.APPROXIMATE_NUM_LIT();
value = approximate_num_lit.GetText();
}
try
{
return(int.Parse(value));
}
catch (Exception e)
{
throw;
}
}
public static int?Integer(PlSqlParser.NumericContext context)
{
if (context == null)
{
return(null);
}
var text = context.GetText();
int value;
if (!Int32.TryParse(text, out value))
{
throw new ParseCanceledException(String.Format("Numeric '{0}' is not an integer.", text));
}
return(value);
}
/// <summary>
/// UNSIGNED_INTEGER | APPROXIMATE_NUM_LIT
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override object VisitNumeric([NotNull] PlSqlParser.NumericContext context)
{
var unsigned = context.UNSIGNED_INTEGER();
if (unsigned != null)
{
return(GetUnsignedInteger(unsigned));
}
else
{
// FLOAT_FRAGMENT ('E' ('+'|'-')? (FLOAT_FRAGMENT | [0-9]+))? ('D' | 'F')?;
var litt = context.APPROXIMATE_NUM_LIT().GetText();
Stop();
}
return(base.VisitNumeric(context));
}
public static int?PositiveInteger(PlSqlParser.NumericContext context)
{
if (context == null)
{
return(null);
}
var text = context.GetText();
if (!Int32.TryParse(text, out var value))
{
throw new ParseCanceledException($"Numeric '{text}' is not an integer.");
}
if (value < 0)
{
throw new ParseCanceledException($"Integer '{text}' is not positive.");
}
return(value);
}