public virtual object GetRuleValue(IMatchable.MatchProperties property)
{
MatchNode.RuleValue rule = rules.GetOrNull(property);
return(rule == null ? null : rule.value);
}
public MatchEngine(string description)
{
// each line is a separate statement/exprent
string[] lines = description.Split("\n");
int depth = 0;
Stack <MatchNode> stack = new Stack <MatchNode>();
foreach (string line in lines)
{
List <string> properties = new List <string>(Sharpen.Arrays.AsList(line.Split("\\s+"
)));
// split on any number of whitespaces
if ((properties[0].Length == 0))
{
properties.RemoveAtReturningValue(0);
}
int node_type = "statement".Equals(properties[0]) ? MatchNode.Matchnode_Statement
: MatchNode.Matchnode_Exprent;
// create new node
MatchNode matchNode = new MatchNode(node_type);
for (int i = 1; i < properties.Count; ++i)
{
string[] values = properties[i].Split(":");
IMatchable.MatchProperties property = (node_type == MatchNode.Matchnode_Statement
? stat_properties : expr_properties).GetOrNull(values[0]);
if (property == null)
{
// unknown property defined
throw new Exception("Unknown matching property");
}
else
{
object value;
int parameter = 0;
string strValue = values[1];
if (values.Length == 3)
{
parameter = System.Convert.ToInt32(values[1]);
strValue = values[2];
}
switch (property.ordinal())
{
case 0:
{
value = stat_type.GetOrNullable(strValue);
break;
}
case 2:
case 3:
{
value = int.Parse(strValue);
break;
}
case 4:
case 8:
case 13:
case 14:
case 15:
case 16:
case 17:
case 12:
case 1:
case 7:
{
value = strValue;
break;
}
case 5:
{
value = stat_if_type.GetOrNullable(strValue);
break;
}
case 9:
{
value = expr_func_type.GetOrNullable(strValue);
break;
}
case 10:
{
value = expr_exit_type.GetOrNullable(strValue);
break;
}
case 11:
{
value = expr_const_type.GetOrNull(strValue);
break;
}
case 6:
{
value = expr_type.GetOrNullable(strValue);
break;
}
default:
{
throw new Exception("Unhandled matching property");
}
}
matchNode.AddRule(property, new MatchNode.RuleValue(parameter, value));
}
}
if ((stack.Count == 0))
{
// first line, root node
stack.Push(matchNode);
}
else
{
// return to the correct parent on the stack
int new_depth = line.LastIndexOf(' ', depth) + 1;
for (int i = new_depth; i <= depth; ++i)
{
stack.Pop();
}
// insert new node
stack.First().AddChild(matchNode);
stack.Push(matchNode);
depth = new_depth;
}
}
this.rootNode = stack.Last();
}
public virtual void AddRule(IMatchable.MatchProperties property, MatchNode.RuleValue
value)
{
Sharpen.Collections.Put(rules, property, value);
}
