public static int GetLevel(this PatternExpressionPrecedenceEnum value)
{
switch (value)
{
case PatternExpressionPrecedenceEnum.MINIMUM:
return(int.MinValue);
case PatternExpressionPrecedenceEnum.FOLLOWEDBY:
return(1);
case PatternExpressionPrecedenceEnum.OR:
return(2);
case PatternExpressionPrecedenceEnum.AND:
return(3);
case PatternExpressionPrecedenceEnum.REPEAT_UNTIL:
return(4);
case PatternExpressionPrecedenceEnum.UNARY:
return(5);
case PatternExpressionPrecedenceEnum.GUARD_POSTFIX:
return(6);
case PatternExpressionPrecedenceEnum.ATOM:
return(int.MaxValue);
}
throw new ArgumentException("invalid value");
}
public void ToEPL(TextWriter writer, PatternExpressionPrecedenceEnum parentPrecedence)
{
if (Precedence.GetLevel() < parentPrecedence.GetLevel())
{
writer.Write("(");
ToPrecedenceFreeEPL(writer);
writer.Write(")");
}
else
{
ToPrecedenceFreeEPL(writer);
}
}
public static void ToPrecedenceFreeEPL(
TextWriter writer,
string delimiterText,
IList<EvalForgeNode> childNodes,
PatternExpressionPrecedenceEnum precedence)
{
var delimiter = "";
foreach (var child in childNodes) {
writer.Write(delimiter);
child.ToEPL(writer, precedence);
delimiter = " " + delimiterText + " ";
}
}
